Merge "gltrace: Patch up all glUniform*() calls."
diff --git a/cmds/keystore/keystore.cpp b/cmds/keystore/keystore.cpp
index 05f77e5..2c9cb35 100644
--- a/cmds/keystore/keystore.cpp
+++ b/cmds/keystore/keystore.cpp
@@ -581,7 +581,7 @@
 static ResponseCode insert(KeyStore* keyStore, int sock, uid_t uid, Value* keyName, Value* val) {
     char filename[NAME_MAX];
     encode_key(filename, uid, keyName);
-    Blob keyBlob(val->value, val->length, 0, NULL);
+    Blob keyBlob(val->value, val->length, NULL, 0);
     return keyStore->put(filename, &keyBlob);
 }
 
diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index 991a181..ae99160 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -60,6 +60,8 @@
     BufferQueue(bool allowSynchronousMode = true);
     virtual ~BufferQueue();
 
+    virtual int query(int what, int* value);
+
     // setBufferCount updates the number of available buffer slots.  After
     // calling this all buffer slots are both unallocated and owned by the
     // BufferQueue object (i.e. they are not owned by the client).
diff --git a/include/gui/SurfaceTexture.h b/include/gui/SurfaceTexture.h
index 4318f0f..dcab049 100644
--- a/include/gui/SurfaceTexture.h
+++ b/include/gui/SurfaceTexture.h
@@ -55,7 +55,7 @@
 
     virtual ~SurfaceTexture();
 
-    virtual int query(int what, int* value);
+
 
     // updateTexImage sets the image contents of the target texture to that of
     // the most recently queued buffer.
diff --git a/include/ui/InputTransport.h b/include/ui/InputTransport.h
index 95e4447..1f738cd 100644
--- a/include/ui/InputTransport.h
+++ b/include/ui/InputTransport.h
@@ -20,17 +20,13 @@
 /**
  * Native input transport.
  *
- * Uses anonymous shared memory as a whiteboard for sending input events from an
- * InputPublisher to an InputConsumer and ensuring appropriate synchronization.
- * One interesting feature is that published events can be updated in place as long as they
- * have not yet been consumed.
+ * The InputChannel provides a mechanism for exchanging InputMessage structures across processes.
  *
- * The InputPublisher and InputConsumer only take care of transferring event data
- * over an InputChannel and sending synchronization signals.  The InputDispatcher and InputQueue
- * build on these abstractions to add multiplexing and queueing.
+ * The InputPublisher and InputConsumer each handle one end-point of an input channel.
+ * The InputPublisher is used by the input dispatcher to send events to the application.
+ * The InputConsumer is used by the application to receive events from the input dispatcher.
  */
 
-#include <semaphore.h>
 #include <ui/Input.h>
 #include <utils/Errors.h>
 #include <utils/Timers.h>
@@ -40,88 +36,26 @@
 namespace android {
 
 /*
- * An input channel consists of a shared memory buffer and a pair of pipes
- * used to send input messages from an InputPublisher to an InputConsumer
- * across processes.  Each channel has a descriptive name for debugging purposes.
- *
- * Each endpoint has its own InputChannel object that specifies its own file descriptors.
- *
- * The input channel is closed when all references to it are released.
- */
-class InputChannel : public RefBase {
-protected:
-    virtual ~InputChannel();
-
-public:
-    InputChannel(const String8& name, int32_t ashmemFd, int32_t receivePipeFd,
-            int32_t sendPipeFd);
-
-    /* Creates a pair of input channels and their underlying shared memory buffers
-     * and pipes.
-     *
-     * Returns OK on success.
-     */
-    static status_t openInputChannelPair(const String8& name,
-            sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel);
-
-    inline String8 getName() const { return mName; }
-    inline int32_t getAshmemFd() const { return mAshmemFd; }
-    inline int32_t getReceivePipeFd() const { return mReceivePipeFd; }
-    inline int32_t getSendPipeFd() const { return mSendPipeFd; }
-
-    /* Sends a signal to the other endpoint.
-     *
-     * Returns OK on success.
-     * Returns DEAD_OBJECT if the channel's peer has been closed.
-     * Other errors probably indicate that the channel is broken.
-     */
-    status_t sendSignal(char signal);
-
-    /* Receives a signal send by the other endpoint.
-     * (Should only call this after poll() indicates that the receivePipeFd has available input.)
-     *
-     * Returns OK on success.
-     * Returns WOULD_BLOCK if there is no signal present.
-     * Returns DEAD_OBJECT if the channel's peer has been closed.
-     * Other errors probably indicate that the channel is broken.
-     */
-    status_t receiveSignal(char* outSignal);
-
-private:
-    String8 mName;
-    int32_t mAshmemFd;
-    int32_t mReceivePipeFd;
-    int32_t mSendPipeFd;
-};
-
-/*
- * Private intermediate representation of input events as messages written into an
- * ashmem buffer.
+ * Intermediate representation used to send input events and related signals.
  */
 struct InputMessage {
-    /* Semaphore count is set to 1 when the message is published.
-     * It becomes 0 transiently while the publisher updates the message.
-     * It becomes 0 permanently when the consumer consumes the message.
-     */
-    sem_t semaphore;
-
-    /* Initialized to false by the publisher.
-     * Set to true by the consumer when it consumes the message.
-     */
-    bool consumed;
-
-    int32_t type;
-
-    struct SampleData {
-        nsecs_t eventTime;
-        PointerCoords coords[0]; // variable length
+    enum {
+        TYPE_KEY = 1,
+        TYPE_MOTION = 2,
+        TYPE_FINISHED = 3,
     };
 
-    int32_t deviceId;
-    int32_t source;
+    struct Header {
+        uint32_t type;
+        uint32_t padding; // 8 byte alignment for the body that follows
+    } header;
 
-    union {
-        struct {
+    union Body {
+        struct Key {
+            uint32_t seq;
+            nsecs_t eventTime;
+            int32_t deviceId;
+            int32_t source;
             int32_t action;
             int32_t flags;
             int32_t keyCode;
@@ -129,10 +63,17 @@
             int32_t metaState;
             int32_t repeatCount;
             nsecs_t downTime;
-            nsecs_t eventTime;
+
+            inline size_t size() const {
+                return sizeof(Key);
+            }
         } key;
 
-        struct {
+        struct Motion {
+            uint32_t seq;
+            nsecs_t eventTime;
+            int32_t deviceId;
+            int32_t source;
             int32_t action;
             int32_t flags;
             int32_t metaState;
@@ -144,28 +85,88 @@
             float xPrecision;
             float yPrecision;
             size_t pointerCount;
-            PointerProperties pointerProperties[MAX_POINTERS];
-            size_t sampleCount;
-            SampleData sampleData[0]; // variable length
+            struct Pointer {
+                PointerProperties properties;
+                PointerCoords coords;
+            } pointers[MAX_POINTERS];
+
+            inline size_t size() const {
+                return sizeof(Motion) - sizeof(Pointer) * MAX_POINTERS
+                        + sizeof(Pointer) * pointerCount;
+            }
         } motion;
-    };
 
-    /* Gets the number of bytes to add to step to the next SampleData object in a motion
-     * event message for a given number of pointers.
-     */
-    static inline size_t sampleDataStride(size_t pointerCount) {
-        return sizeof(InputMessage::SampleData) + pointerCount * sizeof(PointerCoords);
-    }
+        struct Finished {
+            uint32_t seq;
+            bool handled;
 
-    /* Adds the SampleData stride to the given pointer. */
-    static inline SampleData* sampleDataPtrIncrement(SampleData* ptr, size_t stride) {
-        return reinterpret_cast<InputMessage::SampleData*>(reinterpret_cast<char*>(ptr) + stride);
-    }
+            inline size_t size() const {
+                return sizeof(Finished);
+            }
+        } finished;
+    } body;
+
+    bool isValid(size_t actualSize) const;
+    size_t size() const;
 };
 
 /*
- * Publishes input events to an anonymous shared memory buffer.
- * Uses atomic operations to coordinate shared access with a single concurrent consumer.
+ * An input channel consists of a local unix domain socket used to send and receive
+ * input messages across processes.  Each channel has a descriptive name for debugging purposes.
+ *
+ * Each endpoint has its own InputChannel object that specifies its file descriptor.
+ *
+ * The input channel is closed when all references to it are released.
+ */
+class InputChannel : public RefBase {
+protected:
+    virtual ~InputChannel();
+
+public:
+    InputChannel(const String8& name, int32_t fd);
+
+    /* Creates a pair of input channels.
+     *
+     * Returns OK on success.
+     */
+    static status_t openInputChannelPair(const String8& name,
+            sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel);
+
+    inline String8 getName() const { return mName; }
+    inline int32_t getFd() const { return mFd; }
+
+    /* Sends a message to the other endpoint.
+     *
+     * If the channel is full then the message is guaranteed not to have been sent at all.
+     * Try again after the consumer has sent a finished signal indicating that it has
+     * consumed some of the pending messages from the channel.
+     *
+     * Returns OK on success.
+     * Returns WOULD_BLOCK if the channel is full.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
+     * Other errors probably indicate that the channel is broken.
+     */
+    status_t sendMessage(const InputMessage* msg);
+
+    /* Receives a message sent by the other endpoint.
+     *
+     * If there is no message present, try again after poll() indicates that the fd
+     * is readable.
+     *
+     * Returns OK on success.
+     * Returns WOULD_BLOCK if there is no message present.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
+     * Other errors probably indicate that the channel is broken.
+     */
+    status_t receiveMessage(InputMessage* msg);
+
+private:
+    String8 mName;
+    int32_t mFd;
+};
+
+/*
+ * Publishes input events to an input channel.
  */
 class InputPublisher {
 public:
@@ -178,26 +179,16 @@
     /* Gets the underlying input channel. */
     inline sp<InputChannel> getChannel() { return mChannel; }
 
-    /* Prepares the publisher for use.  Must be called before it is used.
-     * Returns OK on success.
-     *
-     * This method implicitly calls reset(). */
-    status_t initialize();
-
-    /* Resets the publisher to its initial state and unpins its ashmem buffer.
-     * Returns OK on success.
-     *
-     * Should be called after an event has been consumed to release resources used by the
-     * publisher until the next event is ready to be published.
-     */
-    status_t reset();
-
-    /* Publishes a key event to the ashmem buffer.
+    /* Publishes a key event to the input channel.
      *
      * Returns OK on success.
-     * Returns INVALID_OPERATION if the publisher has not been reset.
+     * Returns WOULD_BLOCK if the channel is full.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
+     * Returns BAD_VALUE if seq is 0.
+     * Other errors probably indicate that the channel is broken.
      */
     status_t publishKeyEvent(
+            uint32_t seq,
             int32_t deviceId,
             int32_t source,
             int32_t action,
@@ -209,13 +200,16 @@
             nsecs_t downTime,
             nsecs_t eventTime);
 
-    /* Publishes a motion event to the ashmem buffer.
+    /* Publishes a motion event to the input channel.
      *
      * Returns OK on success.
-     * Returns INVALID_OPERATION if the publisher has not been reset.
-     * Returns BAD_VALUE if pointerCount is less than 1 or greater than MAX_POINTERS.
+     * Returns WOULD_BLOCK if the channel is full.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
+     * Returns BAD_VALUE if seq is 0 or if pointerCount is less than 1 or greater than MAX_POINTERS.
+     * Other errors probably indicate that the channel is broken.
      */
     status_t publishMotionEvent(
+            uint32_t seq,
             int32_t deviceId,
             int32_t source,
             int32_t action,
@@ -233,55 +227,25 @@
             const PointerProperties* pointerProperties,
             const PointerCoords* pointerCoords);
 
-    /* Appends a motion sample to a motion event unless already consumed.
-     *
-     * Returns OK on success.
-     * Returns INVALID_OPERATION if the current event is not a AMOTION_EVENT_ACTION_MOVE event.
-     * Returns FAILED_TRANSACTION if the current event has already been consumed.
-     * Returns NO_MEMORY if the buffer is full and no additional samples can be added.
-     */
-    status_t appendMotionSample(
-            nsecs_t eventTime,
-            const PointerCoords* pointerCoords);
-
-    /* Sends a dispatch signal to the consumer to inform it that a new message is available.
-     *
-     * Returns OK on success.
-     * Errors probably indicate that the channel is broken.
-     */
-    status_t sendDispatchSignal();
-
     /* Receives the finished signal from the consumer in reply to the original dispatch signal.
-     * Returns whether the consumer handled the message.
+     * If a signal was received, returns the message sequence number,
+     * and whether the consumer handled the message.
+     *
+     * The returned sequence number is never 0 unless the operation failed.
      *
      * Returns OK on success.
      * Returns WOULD_BLOCK if there is no signal present.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
      * Other errors probably indicate that the channel is broken.
      */
-    status_t receiveFinishedSignal(bool* outHandled);
+    status_t receiveFinishedSignal(uint32_t* outSeq, bool* outHandled);
 
 private:
     sp<InputChannel> mChannel;
-
-    size_t mAshmemSize;
-    InputMessage* mSharedMessage;
-    bool mPinned;
-    bool mSemaphoreInitialized;
-    bool mWasDispatched;
-
-    size_t mMotionEventPointerCount;
-    InputMessage::SampleData* mMotionEventSampleDataTail;
-    size_t mMotionEventSampleDataStride;
-
-    status_t publishInputEvent(
-            int32_t type,
-            int32_t deviceId,
-            int32_t source);
 };
 
 /*
- * Consumes input events from an anonymous shared memory buffer.
- * Uses atomic operations to coordinate shared access with a single concurrent publisher.
+ * Consumes input events from an input channel.
  */
 class InputConsumer {
 public:
@@ -294,43 +258,76 @@
     /* Gets the underlying input channel. */
     inline sp<InputChannel> getChannel() { return mChannel; }
 
-    /* Prepares the consumer for use.  Must be called before it is used. */
-    status_t initialize();
-
-    /* Consumes the input event in the buffer and copies its contents into
+    /* Consumes an input event from the input channel and copies its contents into
      * an InputEvent object created using the specified factory.
-     * This operation will block if the publisher is updating the event.
+     *
+     * Tries to combine a series of move events into larger batches whenever possible.
+     *
+     * If consumeBatches is false, then defers consuming pending batched events if it
+     * is possible for additional samples to be added to them later.  Call hasPendingBatch()
+     * to determine whether a pending batch is available to be consumed.
+     *
+     * If consumeBatches is true, then events are still batched but they are consumed
+     * immediately as soon as the input channel is exhausted.
+     *
+     * The returned sequence number is never 0 unless the operation failed.
      *
      * Returns OK on success.
-     * Returns INVALID_OPERATION if there is no currently published event.
+     * Returns WOULD_BLOCK if there is no event present.
+     * Returns DEAD_OBJECT if the channel's peer has been closed.
      * Returns NO_MEMORY if the event could not be created.
-     */
-    status_t consume(InputEventFactoryInterface* factory, InputEvent** outEvent);
-
-    /* Sends a finished signal to the publisher to inform it that the current message is
-     * finished processing and specifies whether the message was handled by the consumer.
-     *
-     * Returns OK on success.
-     * Errors probably indicate that the channel is broken.
-     */
-    status_t sendFinishedSignal(bool handled);
-
-    /* Receives the dispatched signal from the publisher.
-     *
-     * Returns OK on success.
-     * Returns WOULD_BLOCK if there is no signal present.
      * Other errors probably indicate that the channel is broken.
      */
-    status_t receiveDispatchSignal();
+    status_t consume(InputEventFactoryInterface* factory, bool consumeBatches,
+            uint32_t* outSeq, InputEvent** outEvent);
+
+    /* Sends a finished signal to the publisher to inform it that the message
+     * with the specified sequence number has finished being process and whether
+     * the message was handled by the consumer.
+     *
+     * Returns OK on success.
+     * Returns BAD_VALUE if seq is 0.
+     * Other errors probably indicate that the channel is broken.
+     */
+    status_t sendFinishedSignal(uint32_t seq, bool handled);
+
+    /* Returns true if there is a pending batch. */
+    bool hasPendingBatch() const;
 
 private:
     sp<InputChannel> mChannel;
 
-    size_t mAshmemSize;
-    InputMessage* mSharedMessage;
+    // The current input message.
+    InputMessage mMsg;
 
-    void populateKeyEvent(KeyEvent* keyEvent) const;
-    void populateMotionEvent(MotionEvent* motionEvent) const;
+    // True if mMsg contains a valid input message that was deferred from the previous
+    // call to consume and that still needs to be handled.
+    bool mMsgDeferred;
+
+    // Batched motion events per device and source.
+    struct Batch {
+        uint32_t seq; // sequence number of last input message batched in the event
+        MotionEvent event;
+    };
+    Vector<Batch> mBatches;
+
+    // Chain of batched sequence numbers.  When multiple input messages are combined into
+    // a batch, we append a record here that associates the last sequence number in the
+    // batch with the previous one.  When the finished signal is sent, we traverse the
+    // chain to individually finish all input messages that were part of the batch.
+    struct SeqChain {
+        uint32_t seq;   // sequence number of batched input message
+        uint32_t chain; // sequence number of previous batched input message
+    };
+    Vector<SeqChain> mSeqChains;
+
+    ssize_t findBatch(int32_t deviceId, int32_t source) const;
+    status_t sendUnchainedFinishedSignal(uint32_t seq, bool handled);
+
+    static void initializeKeyEvent(KeyEvent* event, const InputMessage* msg);
+    static void initializeMotionEvent(MotionEvent* event, const InputMessage* msg);
+    static bool canAppendSamples(const MotionEvent* event, const InputMessage* msg);
+    static void appendSamples(MotionEvent* event, const InputMessage* msg);
 };
 
 } // namespace android
diff --git a/include/utils/KeyedVector.h b/include/utils/KeyedVector.h
index 6bcdea4..fcc3bcf 100644
--- a/include/utils/KeyedVector.h
+++ b/include/utils/KeyedVector.h
@@ -66,7 +66,7 @@
             ssize_t         indexOfKey(const KEY& key) const;
 
     /*!
-     * modifing the array
+     * modifying the array
      */
 
             VALUE&          editValueFor(const KEY& key);
diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index c7e2c0f..0791de2 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -166,6 +166,37 @@
     return OK;
 }
 
+int BufferQueue::query(int what, int* outValue)
+{
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("query: SurfaceTexture has been abandoned!");
+        return NO_INIT;
+    }
+
+    int value;
+    switch (what) {
+    case NATIVE_WINDOW_WIDTH:
+        value = mDefaultWidth;
+        break;
+    case NATIVE_WINDOW_HEIGHT:
+        value = mDefaultHeight;
+        break;
+    case NATIVE_WINDOW_FORMAT:
+        value = mPixelFormat;
+        break;
+    case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
+        value = mSynchronousMode ?
+                (MIN_UNDEQUEUED_BUFFERS-1) : MIN_UNDEQUEUED_BUFFERS;
+        break;
+    default:
+        return BAD_VALUE;
+    }
+    outValue[0] = value;
+    return NO_ERROR;
+}
+
 status_t BufferQueue::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
     ST_LOGV("requestBuffer: slot=%d", slot);
     Mutex::Autolock lock(mMutex);
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index be1bcd1..a7bfc61 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -416,36 +416,7 @@
     return mSynchronousMode;
 }
 
-int SurfaceTexture::query(int what, int* outValue)
-{
-    Mutex::Autolock lock(mMutex);
 
-    if (mAbandoned) {
-        ST_LOGE("query: SurfaceTexture has been abandoned!");
-        return NO_INIT;
-    }
-
-    int value;
-    switch (what) {
-    case NATIVE_WINDOW_WIDTH:
-        value = mDefaultWidth;
-        break;
-    case NATIVE_WINDOW_HEIGHT:
-        value = mDefaultHeight;
-        break;
-    case NATIVE_WINDOW_FORMAT:
-        value = mPixelFormat;
-        break;
-    case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
-        value = mSynchronousMode ?
-                (MIN_UNDEQUEUED_BUFFERS-1) : MIN_UNDEQUEUED_BUFFERS;
-        break;
-    default:
-        return BAD_VALUE;
-    }
-    outValue[0] = value;
-    return NO_ERROR;
-}
 
 void SurfaceTexture::abandon() {
     Mutex::Autolock lock(mMutex);
diff --git a/libs/ui/InputTransport.cpp b/libs/ui/InputTransport.cpp
index 09cbb31..ecb3fb5 100644
--- a/libs/ui/InputTransport.cpp
+++ b/libs/ui/InputTransport.cpp
@@ -7,325 +7,203 @@
 
 //#define LOG_NDEBUG 0
 
-// Log debug messages about channel signalling (send signal, receive signal)
-#define DEBUG_CHANNEL_SIGNALS 0
+// Log debug messages about channel messages (send message, receive message)
+#define DEBUG_CHANNEL_MESSAGES 0
 
 // Log debug messages whenever InputChannel objects are created/destroyed
 #define DEBUG_CHANNEL_LIFECYCLE 0
 
-// Log debug messages about transport actions (initialize, reset, publish, ...)
+// Log debug messages about transport actions
 #define DEBUG_TRANSPORT_ACTIONS 0
 
 
-#include <cutils/ashmem.h>
 #include <cutils/log.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <sys/mman.h>
 #include <ui/InputTransport.h>
 #include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
 
 namespace android {
 
-#define ROUND_UP(value, boundary) (((value) + (boundary) - 1) & ~((boundary) - 1))
-#define MIN_HISTORY_DEPTH 20
+// Socket buffer size.  The default is typically about 128KB, which is much larger than
+// we really need.  So we make it smaller.  It just needs to be big enough to hold
+// a few dozen large multi-finger motion events in the case where an application gets
+// behind processing touches.
+static const size_t SOCKET_BUFFER_SIZE = 32 * 1024;
 
-// Must be at least sizeof(InputMessage) + sufficient space for pointer data
-static const int DEFAULT_MESSAGE_BUFFER_SIZE = ROUND_UP(
-        sizeof(InputMessage) + MIN_HISTORY_DEPTH
-                * (sizeof(InputMessage::SampleData) + MAX_POINTERS * sizeof(PointerCoords)),
-        4096);
 
-// Signal sent by the producer to the consumer to inform it that a new message is
-// available to be consumed in the shared memory buffer.
-static const char INPUT_SIGNAL_DISPATCH = 'D';
+// --- InputMessage ---
 
-// Signal sent by the consumer to the producer to inform it that it has finished
-// consuming the most recent message and it handled it.
-static const char INPUT_SIGNAL_FINISHED_HANDLED = 'f';
+bool InputMessage::isValid(size_t actualSize) const {
+    if (size() == actualSize) {
+        switch (header.type) {
+        case TYPE_KEY:
+            return true;
+        case TYPE_MOTION:
+            return body.motion.pointerCount > 0
+                    && body.motion.pointerCount <= MAX_POINTERS;
+        case TYPE_FINISHED:
+            return true;
+        }
+    }
+    return false;
+}
 
-// Signal sent by the consumer to the producer to inform it that it has finished
-// consuming the most recent message but it did not handle it.
-static const char INPUT_SIGNAL_FINISHED_UNHANDLED = 'u';
+size_t InputMessage::size() const {
+    switch (header.type) {
+    case TYPE_KEY:
+        return sizeof(Header) + body.key.size();
+    case TYPE_MOTION:
+        return sizeof(Header) + body.motion.size();
+    case TYPE_FINISHED:
+        return sizeof(Header) + body.finished.size();
+    }
+    return sizeof(Header);
+}
 
 
 // --- InputChannel ---
 
-InputChannel::InputChannel(const String8& name, int32_t ashmemFd, int32_t receivePipeFd,
-        int32_t sendPipeFd) :
-        mName(name), mAshmemFd(ashmemFd), mReceivePipeFd(receivePipeFd), mSendPipeFd(sendPipeFd) {
+InputChannel::InputChannel(const String8& name, int fd) :
+        mName(name), mFd(fd) {
 #if DEBUG_CHANNEL_LIFECYCLE
-    ALOGD("Input channel constructed: name='%s', ashmemFd=%d, receivePipeFd=%d, sendPipeFd=%d",
-            mName.string(), ashmemFd, receivePipeFd, sendPipeFd);
+    ALOGD("Input channel constructed: name='%s', fd=%d",
+            mName.string(), fd);
 #endif
 
-    int result = fcntl(mReceivePipeFd, F_SETFL, O_NONBLOCK);
-    LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make receive pipe "
-            "non-blocking.  errno=%d", mName.string(), errno);
-
-    result = fcntl(mSendPipeFd, F_SETFL, O_NONBLOCK);
-    LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make send pipe "
+    int result = fcntl(mFd, F_SETFL, O_NONBLOCK);
+    LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make socket "
             "non-blocking.  errno=%d", mName.string(), errno);
 }
 
 InputChannel::~InputChannel() {
 #if DEBUG_CHANNEL_LIFECYCLE
-    ALOGD("Input channel destroyed: name='%s', ashmemFd=%d, receivePipeFd=%d, sendPipeFd=%d",
-            mName.string(), mAshmemFd, mReceivePipeFd, mSendPipeFd);
+    ALOGD("Input channel destroyed: name='%s', fd=%d",
+            mName.string(), mFd);
 #endif
 
-    ::close(mAshmemFd);
-    ::close(mReceivePipeFd);
-    ::close(mSendPipeFd);
+    ::close(mFd);
 }
 
 status_t InputChannel::openInputChannelPair(const String8& name,
         sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel) {
-    status_t result;
-
-    String8 ashmemName("InputChannel ");
-    ashmemName.append(name);
-    int serverAshmemFd = ashmem_create_region(ashmemName.string(), DEFAULT_MESSAGE_BUFFER_SIZE);
-    if (serverAshmemFd < 0) {
-        result = -errno;
-        ALOGE("channel '%s' ~ Could not create shared memory region. errno=%d",
+    int sockets[2];
+    if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets)) {
+        status_t result = -errno;
+        ALOGE("channel '%s' ~ Could not create socket pair.  errno=%d",
                 name.string(), errno);
-    } else {
-        result = ashmem_set_prot_region(serverAshmemFd, PROT_READ | PROT_WRITE);
-        if (result < 0) {
-            ALOGE("channel '%s' ~ Error %d trying to set protection of ashmem fd %d.",
-                    name.string(), result, serverAshmemFd);
-        } else {
-            // Dup the file descriptor because the server and client input channel objects that
-            // are returned may have different lifetimes but they share the same shared memory region.
-            int clientAshmemFd;
-            clientAshmemFd = dup(serverAshmemFd);
-            if (clientAshmemFd < 0) {
-                result = -errno;
-                ALOGE("channel '%s' ~ Could not dup() shared memory region fd. errno=%d",
-                        name.string(), errno);
-            } else {
-                int forward[2];
-                if (pipe(forward)) {
-                    result = -errno;
-                    ALOGE("channel '%s' ~ Could not create forward pipe.  errno=%d",
-                            name.string(), errno);
-                } else {
-                    int reverse[2];
-                    if (pipe(reverse)) {
-                        result = -errno;
-                        ALOGE("channel '%s' ~ Could not create reverse pipe.  errno=%d",
-                                name.string(), errno);
-                    } else {
-                        String8 serverChannelName = name;
-                        serverChannelName.append(" (server)");
-                        outServerChannel = new InputChannel(serverChannelName,
-                                serverAshmemFd, reverse[0], forward[1]);
-
-                        String8 clientChannelName = name;
-                        clientChannelName.append(" (client)");
-                        outClientChannel = new InputChannel(clientChannelName,
-                                clientAshmemFd, forward[0], reverse[1]);
-                        return OK;
-                    }
-                    ::close(forward[0]);
-                    ::close(forward[1]);
-                }
-                ::close(clientAshmemFd);
-            }
-        }
-        ::close(serverAshmemFd);
+        outServerChannel.clear();
+        outClientChannel.clear();
+        return result;
     }
 
-    outServerChannel.clear();
-    outClientChannel.clear();
-    return result;
+    int bufferSize = SOCKET_BUFFER_SIZE;
+    setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
+    setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
+    setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize));
+    setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize));
+
+    String8 serverChannelName = name;
+    serverChannelName.append(" (server)");
+    outServerChannel = new InputChannel(serverChannelName, sockets[0]);
+
+    String8 clientChannelName = name;
+    clientChannelName.append(" (client)");
+    outClientChannel = new InputChannel(clientChannelName, sockets[1]);
+    return OK;
 }
 
-status_t InputChannel::sendSignal(char signal) {
+status_t InputChannel::sendMessage(const InputMessage* msg) {
+    size_t msgLength = msg->size();
     ssize_t nWrite;
     do {
-        nWrite = ::write(mSendPipeFd, & signal, 1);
+        nWrite = ::send(mFd, msg, msgLength, MSG_DONTWAIT | MSG_NOSIGNAL);
     } while (nWrite == -1 && errno == EINTR);
 
-    if (nWrite == 1) {
-#if DEBUG_CHANNEL_SIGNALS
-        ALOGD("channel '%s' ~ sent signal '%c'", mName.string(), signal);
+    if (nWrite < 0) {
+        int error = errno;
+#if DEBUG_CHANNEL_MESSAGES
+        ALOGD("channel '%s' ~ error sending message of type %d, errno=%d", mName.string(),
+                msg->header.type, error);
 #endif
-        return OK;
+        if (error == EAGAIN || error == EWOULDBLOCK) {
+            return WOULD_BLOCK;
+        }
+        if (error == EPIPE || error == ENOTCONN) {
+            return DEAD_OBJECT;
+        }
+        return -error;
     }
 
-#if DEBUG_CHANNEL_SIGNALS
-    ALOGD("channel '%s' ~ error sending signal '%c', errno=%d", mName.string(), signal, errno);
-#endif
-    return -errno;
-}
-
-status_t InputChannel::receiveSignal(char* outSignal) {
-    ssize_t nRead;
-    do {
-        nRead = ::read(mReceivePipeFd, outSignal, 1);
-    } while (nRead == -1 && errno == EINTR);
-
-    if (nRead == 1) {
-#if DEBUG_CHANNEL_SIGNALS
-        ALOGD("channel '%s' ~ received signal '%c'", mName.string(), *outSignal);
-#endif
-        return OK;
-    }
-
-    if (nRead == 0) { // check for EOF
-#if DEBUG_CHANNEL_SIGNALS
-        ALOGD("channel '%s' ~ receive signal failed because peer was closed", mName.string());
+    if (size_t(nWrite) != msgLength) {
+#if DEBUG_CHANNEL_MESSAGES
+        ALOGD("channel '%s' ~ error sending message type %d, send was incomplete",
+                mName.string(), msg->header.type);
 #endif
         return DEAD_OBJECT;
     }
 
-    if (errno == EAGAIN) {
-#if DEBUG_CHANNEL_SIGNALS
-        ALOGD("channel '%s' ~ receive signal failed because no signal available", mName.string());
+#if DEBUG_CHANNEL_MESSAGES
+    ALOGD("channel '%s' ~ sent message of type %d", mName.string(), msg->header.type);
 #endif
-        return WOULD_BLOCK;
+    return OK;
+}
+
+status_t InputChannel::receiveMessage(InputMessage* msg) {
+    ssize_t nRead;
+    do {
+        nRead = ::recv(mFd, msg, sizeof(InputMessage), MSG_DONTWAIT);
+    } while (nRead == -1 && errno == EINTR);
+
+    if (nRead < 0) {
+        int error = errno;
+#if DEBUG_CHANNEL_MESSAGES
+        ALOGD("channel '%s' ~ receive message failed, errno=%d", mName.string(), errno);
+#endif
+        if (error == EAGAIN || error == EWOULDBLOCK) {
+            return WOULD_BLOCK;
+        }
+        if (error == EPIPE || error == ENOTCONN) {
+            return DEAD_OBJECT;
+        }
+        return -error;
     }
 
-#if DEBUG_CHANNEL_SIGNALS
-    ALOGD("channel '%s' ~ receive signal failed, errno=%d", mName.string(), errno);
+    if (nRead == 0) { // check for EOF
+#if DEBUG_CHANNEL_MESSAGES
+        ALOGD("channel '%s' ~ receive message failed because peer was closed", mName.string());
 #endif
-    return -errno;
+        return DEAD_OBJECT;
+    }
+
+    if (!msg->isValid(nRead)) {
+#if DEBUG_CHANNEL_MESSAGES
+        ALOGD("channel '%s' ~ received invalid message", mName.string());
+#endif
+        return BAD_VALUE;
+    }
+
+#if DEBUG_CHANNEL_MESSAGES
+    ALOGD("channel '%s' ~ received message of type %d", mName.string(), msg->header.type);
+#endif
+    return OK;
 }
 
 
 // --- InputPublisher ---
 
 InputPublisher::InputPublisher(const sp<InputChannel>& channel) :
-        mChannel(channel), mSharedMessage(NULL),
-        mPinned(false), mSemaphoreInitialized(false), mWasDispatched(false),
-        mMotionEventSampleDataTail(NULL) {
+        mChannel(channel) {
 }
 
 InputPublisher::~InputPublisher() {
-    reset();
-
-    if (mSharedMessage) {
-        munmap(mSharedMessage, mAshmemSize);
-    }
-}
-
-status_t InputPublisher::initialize() {
-#if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ initialize",
-            mChannel->getName().string());
-#endif
-
-    int ashmemFd = mChannel->getAshmemFd();
-    int result = ashmem_get_size_region(ashmemFd);
-    if (result < 0) {
-        ALOGE("channel '%s' publisher ~ Error %d getting size of ashmem fd %d.",
-                mChannel->getName().string(), result, ashmemFd);
-        return UNKNOWN_ERROR;
-    }
-    mAshmemSize = (size_t) result;
-
-    mSharedMessage = static_cast<InputMessage*>(mmap(NULL, mAshmemSize,
-            PROT_READ | PROT_WRITE, MAP_SHARED, ashmemFd, 0));
-    if (! mSharedMessage) {
-        ALOGE("channel '%s' publisher ~ mmap failed on ashmem fd %d.",
-                mChannel->getName().string(), ashmemFd);
-        return NO_MEMORY;
-    }
-
-    mPinned = true;
-    mSharedMessage->consumed = false;
-
-    return reset();
-}
-
-status_t InputPublisher::reset() {
-#if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ reset",
-        mChannel->getName().string());
-#endif
-
-    if (mPinned) {
-        // Destroy the semaphore since we are about to unpin the memory region that contains it.
-        int result;
-        if (mSemaphoreInitialized) {
-            if (mSharedMessage->consumed) {
-                result = sem_post(& mSharedMessage->semaphore);
-                if (result < 0) {
-                    ALOGE("channel '%s' publisher ~ Error %d in sem_post.",
-                            mChannel->getName().string(), errno);
-                    return UNKNOWN_ERROR;
-                }
-            }
-
-            result = sem_destroy(& mSharedMessage->semaphore);
-            if (result < 0) {
-                ALOGE("channel '%s' publisher ~ Error %d in sem_destroy.",
-                        mChannel->getName().string(), errno);
-                return UNKNOWN_ERROR;
-            }
-
-            mSemaphoreInitialized = false;
-        }
-
-        // Unpin the region since we no longer care about its contents.
-        int ashmemFd = mChannel->getAshmemFd();
-        result = ashmem_unpin_region(ashmemFd, 0, 0);
-        if (result < 0) {
-            ALOGE("channel '%s' publisher ~ Error %d unpinning ashmem fd %d.",
-                    mChannel->getName().string(), result, ashmemFd);
-            return UNKNOWN_ERROR;
-        }
-
-        mPinned = false;
-    }
-
-    mMotionEventSampleDataTail = NULL;
-    mWasDispatched = false;
-    return OK;
-}
-
-status_t InputPublisher::publishInputEvent(
-        int32_t type,
-        int32_t deviceId,
-        int32_t source) {
-    if (mPinned) {
-        ALOGE("channel '%s' publisher ~ Attempted to publish a new event but publisher has "
-                "not yet been reset.", mChannel->getName().string());
-        return INVALID_OPERATION;
-    }
-
-    // Pin the region.
-    // We do not check for ASHMEM_NOT_PURGED because we don't care about the previous
-    // contents of the buffer so it does not matter whether it was purged in the meantime.
-    int ashmemFd = mChannel->getAshmemFd();
-    int result = ashmem_pin_region(ashmemFd, 0, 0);
-    if (result < 0) {
-        ALOGE("channel '%s' publisher ~ Error %d pinning ashmem fd %d.",
-                mChannel->getName().string(), result, ashmemFd);
-        return UNKNOWN_ERROR;
-    }
-
-    mPinned = true;
-
-    result = sem_init(& mSharedMessage->semaphore, 1, 1);
-    if (result < 0) {
-        ALOGE("channel '%s' publisher ~ Error %d in sem_init.",
-                mChannel->getName().string(), errno);
-        return UNKNOWN_ERROR;
-    }
-
-    mSemaphoreInitialized = true;
-
-    mSharedMessage->consumed = false;
-    mSharedMessage->type = type;
-    mSharedMessage->deviceId = deviceId;
-    mSharedMessage->source = source;
-    return OK;
 }
 
 status_t InputPublisher::publishKeyEvent(
+        uint32_t seq,
         int32_t deviceId,
         int32_t source,
         int32_t action,
@@ -337,31 +215,37 @@
         nsecs_t downTime,
         nsecs_t eventTime) {
 #if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ publishKeyEvent: deviceId=%d, source=0x%x, "
+    ALOGD("channel '%s' publisher ~ publishKeyEvent: seq=%u, deviceId=%d, source=0x%x, "
             "action=0x%x, flags=0x%x, keyCode=%d, scanCode=%d, metaState=0x%x, repeatCount=%d,"
             "downTime=%lld, eventTime=%lld",
-            mChannel->getName().string(),
+            mChannel->getName().string(), seq,
             deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount,
             downTime, eventTime);
 #endif
 
-    status_t result = publishInputEvent(AINPUT_EVENT_TYPE_KEY, deviceId, source);
-    if (result < 0) {
-        return result;
+    if (!seq) {
+        ALOGE("Attempted to publish a key event with sequence number 0.");
+        return BAD_VALUE;
     }
 
-    mSharedMessage->key.action = action;
-    mSharedMessage->key.flags = flags;
-    mSharedMessage->key.keyCode = keyCode;
-    mSharedMessage->key.scanCode = scanCode;
-    mSharedMessage->key.metaState = metaState;
-    mSharedMessage->key.repeatCount = repeatCount;
-    mSharedMessage->key.downTime = downTime;
-    mSharedMessage->key.eventTime = eventTime;
-    return OK;
+    InputMessage msg;
+    msg.header.type = InputMessage::TYPE_KEY;
+    msg.body.key.seq = seq;
+    msg.body.key.deviceId = deviceId;
+    msg.body.key.source = source;
+    msg.body.key.action = action;
+    msg.body.key.flags = flags;
+    msg.body.key.keyCode = keyCode;
+    msg.body.key.scanCode = scanCode;
+    msg.body.key.metaState = metaState;
+    msg.body.key.repeatCount = repeatCount;
+    msg.body.key.downTime = downTime;
+    msg.body.key.eventTime = eventTime;
+    return mChannel->sendMessage(&msg);
 }
 
 status_t InputPublisher::publishMotionEvent(
+        uint32_t seq,
         int32_t deviceId,
         int32_t source,
         int32_t action,
@@ -379,349 +263,349 @@
         const PointerProperties* pointerProperties,
         const PointerCoords* pointerCoords) {
 #if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ publishMotionEvent: deviceId=%d, source=0x%x, "
+    ALOGD("channel '%s' publisher ~ publishMotionEvent: seq=%u, deviceId=%d, source=0x%x, "
             "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, "
             "xOffset=%f, yOffset=%f, "
             "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, "
             "pointerCount=%d",
-            mChannel->getName().string(),
+            mChannel->getName().string(), seq,
             deviceId, source, action, flags, edgeFlags, metaState, buttonState,
             xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount);
 #endif
 
+    if (!seq) {
+        ALOGE("Attempted to publish a motion event with sequence number 0.");
+        return BAD_VALUE;
+    }
+
     if (pointerCount > MAX_POINTERS || pointerCount < 1) {
         ALOGE("channel '%s' publisher ~ Invalid number of pointers provided: %d.",
                 mChannel->getName().string(), pointerCount);
         return BAD_VALUE;
     }
 
-    status_t result = publishInputEvent(AINPUT_EVENT_TYPE_MOTION, deviceId, source);
-    if (result < 0) {
-        return result;
-    }
-
-    mSharedMessage->motion.action = action;
-    mSharedMessage->motion.flags = flags;
-    mSharedMessage->motion.edgeFlags = edgeFlags;
-    mSharedMessage->motion.metaState = metaState;
-    mSharedMessage->motion.buttonState = buttonState;
-    mSharedMessage->motion.xOffset = xOffset;
-    mSharedMessage->motion.yOffset = yOffset;
-    mSharedMessage->motion.xPrecision = xPrecision;
-    mSharedMessage->motion.yPrecision = yPrecision;
-    mSharedMessage->motion.downTime = downTime;
-    mSharedMessage->motion.pointerCount = pointerCount;
-
-    mSharedMessage->motion.sampleCount = 1;
-    mSharedMessage->motion.sampleData[0].eventTime = eventTime;
-
+    InputMessage msg;
+    msg.header.type = InputMessage::TYPE_MOTION;
+    msg.body.motion.seq = seq;
+    msg.body.motion.deviceId = deviceId;
+    msg.body.motion.source = source;
+    msg.body.motion.action = action;
+    msg.body.motion.flags = flags;
+    msg.body.motion.edgeFlags = edgeFlags;
+    msg.body.motion.metaState = metaState;
+    msg.body.motion.buttonState = buttonState;
+    msg.body.motion.xOffset = xOffset;
+    msg.body.motion.yOffset = yOffset;
+    msg.body.motion.xPrecision = xPrecision;
+    msg.body.motion.yPrecision = yPrecision;
+    msg.body.motion.downTime = downTime;
+    msg.body.motion.eventTime = eventTime;
+    msg.body.motion.pointerCount = pointerCount;
     for (size_t i = 0; i < pointerCount; i++) {
-        mSharedMessage->motion.pointerProperties[i].copyFrom(pointerProperties[i]);
-        mSharedMessage->motion.sampleData[0].coords[i].copyFrom(pointerCoords[i]);
+        msg.body.motion.pointers[i].properties.copyFrom(pointerProperties[i]);
+        msg.body.motion.pointers[i].coords.copyFrom(pointerCoords[i]);
     }
-
-    // Cache essential information about the motion event to ensure that a malicious consumer
-    // cannot confuse the publisher by modifying the contents of the shared memory buffer while
-    // it is being updated.
-    if (action == AMOTION_EVENT_ACTION_MOVE
-            || action == AMOTION_EVENT_ACTION_HOVER_MOVE) {
-        mMotionEventPointerCount = pointerCount;
-        mMotionEventSampleDataStride = InputMessage::sampleDataStride(pointerCount);
-        mMotionEventSampleDataTail = InputMessage::sampleDataPtrIncrement(
-                mSharedMessage->motion.sampleData, mMotionEventSampleDataStride);
-    } else {
-        mMotionEventSampleDataTail = NULL;
-    }
-    return OK;
+    return mChannel->sendMessage(&msg);
 }
 
-status_t InputPublisher::appendMotionSample(
-        nsecs_t eventTime,
-        const PointerCoords* pointerCoords) {
-#if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ appendMotionSample: eventTime=%lld",
-            mChannel->getName().string(), eventTime);
-#endif
-
-    if (! mPinned || ! mMotionEventSampleDataTail) {
-        ALOGE("channel '%s' publisher ~ Cannot append motion sample because there is no current "
-                "AMOTION_EVENT_ACTION_MOVE or AMOTION_EVENT_ACTION_HOVER_MOVE event.",
-                mChannel->getName().string());
-        return INVALID_OPERATION;
-    }
-
-    InputMessage::SampleData* newTail = InputMessage::sampleDataPtrIncrement(
-            mMotionEventSampleDataTail, mMotionEventSampleDataStride);
-    size_t newBytesUsed = reinterpret_cast<char*>(newTail) -
-            reinterpret_cast<char*>(mSharedMessage);
-
-    if (newBytesUsed > mAshmemSize) {
-#if DEBUG_TRANSPORT_ACTIONS
-        ALOGD("channel '%s' publisher ~ Cannot append motion sample because the shared memory "
-                "buffer is full.  Buffer size: %d bytes, pointers: %d, samples: %d",
-                mChannel->getName().string(),
-                mAshmemSize, mMotionEventPointerCount, mSharedMessage->motion.sampleCount);
-#endif
-        return NO_MEMORY;
-    }
-
-    int result;
-    if (mWasDispatched) {
-        result = sem_trywait(& mSharedMessage->semaphore);
-        if (result < 0) {
-            if (errno == EAGAIN) {
-                // Only possible source of contention is the consumer having consumed (or being in the
-                // process of consuming) the message and left the semaphore count at 0.
-#if DEBUG_TRANSPORT_ACTIONS
-                ALOGD("channel '%s' publisher ~ Cannot append motion sample because the message has "
-                        "already been consumed.", mChannel->getName().string());
-#endif
-                return FAILED_TRANSACTION;
-            } else {
-                ALOGE("channel '%s' publisher ~ Error %d in sem_trywait.",
-                        mChannel->getName().string(), errno);
-                return UNKNOWN_ERROR;
-            }
-        }
-    }
-
-    mMotionEventSampleDataTail->eventTime = eventTime;
-    for (size_t i = 0; i < mMotionEventPointerCount; i++) {
-        mMotionEventSampleDataTail->coords[i].copyFrom(pointerCoords[i]);
-    }
-    mMotionEventSampleDataTail = newTail;
-
-    mSharedMessage->motion.sampleCount += 1;
-
-    if (mWasDispatched) {
-        result = sem_post(& mSharedMessage->semaphore);
-        if (result < 0) {
-            ALOGE("channel '%s' publisher ~ Error %d in sem_post.",
-                    mChannel->getName().string(), errno);
-            return UNKNOWN_ERROR;
-        }
-    }
-    return OK;
-}
-
-status_t InputPublisher::sendDispatchSignal() {
-#if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' publisher ~ sendDispatchSignal",
-            mChannel->getName().string());
-#endif
-
-    mWasDispatched = true;
-    return mChannel->sendSignal(INPUT_SIGNAL_DISPATCH);
-}
-
-status_t InputPublisher::receiveFinishedSignal(bool* outHandled) {
+status_t InputPublisher::receiveFinishedSignal(uint32_t* outSeq, bool* outHandled) {
 #if DEBUG_TRANSPORT_ACTIONS
     ALOGD("channel '%s' publisher ~ receiveFinishedSignal",
             mChannel->getName().string());
 #endif
 
-    char signal;
-    status_t result = mChannel->receiveSignal(& signal);
+    InputMessage msg;
+    status_t result = mChannel->receiveMessage(&msg);
     if (result) {
+        *outSeq = 0;
         *outHandled = false;
         return result;
     }
-    if (signal == INPUT_SIGNAL_FINISHED_HANDLED) {
-        *outHandled = true;
-    } else if (signal == INPUT_SIGNAL_FINISHED_UNHANDLED) {
-        *outHandled = false;
-    } else {
-        ALOGE("channel '%s' publisher ~ Received unexpected signal '%c' from consumer",
-                mChannel->getName().string(), signal);
+    if (msg.header.type != InputMessage::TYPE_FINISHED) {
+        ALOGE("channel '%s' publisher ~ Received unexpected message of type %d from consumer",
+                mChannel->getName().string(), msg.header.type);
         return UNKNOWN_ERROR;
     }
+    *outSeq = msg.body.finished.seq;
+    *outHandled = msg.body.finished.handled;
     return OK;
 }
 
 // --- InputConsumer ---
 
 InputConsumer::InputConsumer(const sp<InputChannel>& channel) :
-        mChannel(channel), mSharedMessage(NULL) {
+        mChannel(channel), mMsgDeferred(false) {
 }
 
 InputConsumer::~InputConsumer() {
-    if (mSharedMessage) {
-        munmap(mSharedMessage, mAshmemSize);
-    }
 }
 
-status_t InputConsumer::initialize() {
+status_t InputConsumer::consume(InputEventFactoryInterface* factory,
+        bool consumeBatches, uint32_t* outSeq, InputEvent** outEvent) {
 #if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' consumer ~ initialize",
-            mChannel->getName().string());
+    ALOGD("channel '%s' consumer ~ consume: consumeBatches=%s",
+            mChannel->getName().string(), consumeBatches ? "true" : "false");
 #endif
 
-    int ashmemFd = mChannel->getAshmemFd();
-    int result = ashmem_get_size_region(ashmemFd);
-    if (result < 0) {
-        ALOGE("channel '%s' consumer ~ Error %d getting size of ashmem fd %d.",
-                mChannel->getName().string(), result, ashmemFd);
-        return UNKNOWN_ERROR;
-    }
-
-    mAshmemSize = (size_t) result;
-
-    mSharedMessage = static_cast<InputMessage*>(mmap(NULL, mAshmemSize,
-            PROT_READ | PROT_WRITE, MAP_SHARED, ashmemFd, 0));
-    if (! mSharedMessage) {
-        ALOGE("channel '%s' consumer ~ mmap failed on ashmem fd %d.",
-                mChannel->getName().string(), ashmemFd);
-        return NO_MEMORY;
-    }
-
-    return OK;
-}
-
-status_t InputConsumer::consume(InputEventFactoryInterface* factory, InputEvent** outEvent) {
-#if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' consumer ~ consume",
-            mChannel->getName().string());
-#endif
-
+    *outSeq = 0;
     *outEvent = NULL;
 
-    int ashmemFd = mChannel->getAshmemFd();
-    int result = ashmem_pin_region(ashmemFd, 0, 0);
-    if (result != ASHMEM_NOT_PURGED) {
-        if (result == ASHMEM_WAS_PURGED) {
-            ALOGE("channel '%s' consumer ~ Error %d pinning ashmem fd %d because it was purged "
-                    "which probably indicates that the publisher and consumer are out of sync.",
-                    mChannel->getName().string(), result, ashmemFd);
-            return INVALID_OPERATION;
+    // Fetch the next input message.
+    // Loop until an event can be returned or no additional events are received.
+    while (!*outEvent) {
+        if (mMsgDeferred) {
+            // mMsg contains a valid input message from the previous call to consume
+            // that has not yet been processed.
+            mMsgDeferred = false;
+        } else {
+            // Receive a fresh message.
+            status_t result = mChannel->receiveMessage(&mMsg);
+            if (result) {
+                // Consume the next batched event unless batches are being held for later.
+                if (!mBatches.isEmpty() && (consumeBatches || result != WOULD_BLOCK)) {
+                    MotionEvent* motionEvent = factory->createMotionEvent();
+                    if (! motionEvent) return NO_MEMORY;
+
+                    const Batch& batch = mBatches.top();
+                    motionEvent->copyFrom(&batch.event, true /*keepHistory*/);
+                    *outSeq = batch.seq;
+                    *outEvent = motionEvent;
+                    mBatches.pop();
+#if DEBUG_TRANSPORT_ACTIONS
+                    ALOGD("channel '%s' consumer ~ consumed batch event, seq=%u",
+                            mChannel->getName().string(), *outSeq);
+#endif
+                    break;
+                }
+                return result;
+            }
         }
 
-        ALOGE("channel '%s' consumer ~ Error %d pinning ashmem fd %d.",
-                mChannel->getName().string(), result, ashmemFd);
-        return UNKNOWN_ERROR;
-    }
+        switch (mMsg.header.type) {
+        case InputMessage::TYPE_KEY: {
+            KeyEvent* keyEvent = factory->createKeyEvent();
+            if (!keyEvent) return NO_MEMORY;
 
-    if (mSharedMessage->consumed) {
-        ALOGE("channel '%s' consumer ~ The current message has already been consumed.",
-                mChannel->getName().string());
-        return INVALID_OPERATION;
-    }
-
-    // Acquire but *never release* the semaphore.  Contention on the semaphore is used to signal
-    // to the publisher that the message has been consumed (or is in the process of being
-    // consumed).  Eventually the publisher will reinitialize the semaphore for the next message.
-    result = sem_wait(& mSharedMessage->semaphore);
-    if (result < 0) {
-        ALOGE("channel '%s' consumer ~ Error %d in sem_wait.",
-                mChannel->getName().string(), errno);
-        return UNKNOWN_ERROR;
-    }
-
-    mSharedMessage->consumed = true;
-
-    switch (mSharedMessage->type) {
-    case AINPUT_EVENT_TYPE_KEY: {
-        KeyEvent* keyEvent = factory->createKeyEvent();
-        if (! keyEvent) return NO_MEMORY;
-
-        populateKeyEvent(keyEvent);
-
-        *outEvent = keyEvent;
-        break;
-    }
-
-    case AINPUT_EVENT_TYPE_MOTION: {
-        MotionEvent* motionEvent = factory->createMotionEvent();
-        if (! motionEvent) return NO_MEMORY;
-
-        populateMotionEvent(motionEvent);
-
-        *outEvent = motionEvent;
-        break;
-    }
-
-    default:
-        ALOGE("channel '%s' consumer ~ Received message of unknown type %d",
-                mChannel->getName().string(), mSharedMessage->type);
-        return UNKNOWN_ERROR;
-    }
-
-    return OK;
-}
-
-status_t InputConsumer::sendFinishedSignal(bool handled) {
+            initializeKeyEvent(keyEvent, &mMsg);
+            *outSeq = mMsg.body.key.seq;
+            *outEvent = keyEvent;
 #if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' consumer ~ sendFinishedSignal: handled=%d",
-            mChannel->getName().string(), handled);
+            ALOGD("channel '%s' consumer ~ consumed key event, seq=%u",
+                    mChannel->getName().string(), *outSeq);
 #endif
+            break;
+        }
 
-    return mChannel->sendSignal(handled
-            ? INPUT_SIGNAL_FINISHED_HANDLED
-            : INPUT_SIGNAL_FINISHED_UNHANDLED);
-}
+        case AINPUT_EVENT_TYPE_MOTION: {
+            ssize_t batchIndex = findBatch(mMsg.body.motion.deviceId, mMsg.body.motion.source);
+            if (batchIndex >= 0) {
+                Batch& batch = mBatches.editItemAt(batchIndex);
+                if (canAppendSamples(&batch.event, &mMsg)) {
+                    // Append to the batch and save the new sequence number for the tail end.
+                    uint32_t chain = batch.seq;
+                    appendSamples(&batch.event, &mMsg);
+                    batch.seq = mMsg.body.motion.seq;
 
-status_t InputConsumer::receiveDispatchSignal() {
+                    // Update the sequence number chain.
+                    SeqChain seqChain;
+                    seqChain.seq = batch.seq;
+                    seqChain.chain = chain;
+                    mSeqChains.push(seqChain);
 #if DEBUG_TRANSPORT_ACTIONS
-    ALOGD("channel '%s' consumer ~ receiveDispatchSignal",
-            mChannel->getName().string());
+                    ALOGD("channel '%s' consumer ~ appended to batch event",
+                            mChannel->getName().string());
 #endif
+                    break;
+                } else {
+                    MotionEvent* motionEvent = factory->createMotionEvent();
+                    if (! motionEvent) return NO_MEMORY;
 
-    char signal;
-    status_t result = mChannel->receiveSignal(& signal);
-    if (result) {
-        return result;
-    }
-    if (signal != INPUT_SIGNAL_DISPATCH) {
-        ALOGE("channel '%s' consumer ~ Received unexpected signal '%c' from publisher",
-                mChannel->getName().string(), signal);
-        return UNKNOWN_ERROR;
+                    // We cannot append to the batch in progress, so we need to consume
+                    // the previous batch right now and defer the new message until later.
+                    mMsgDeferred = true;
+
+                    // Return the end of the previous batch.
+                    motionEvent->copyFrom(&batch.event, true /*keepHistory*/);
+                    *outSeq = batch.seq;
+                    *outEvent = motionEvent;
+                    mBatches.removeAt(batchIndex);
+#if DEBUG_TRANSPORT_ACTIONS
+                    ALOGD("channel '%s' consumer ~ consumed batch event and "
+                            "deferred current event, seq=%u",
+                            mChannel->getName().string(), *outSeq);
+#endif
+                    break;
+                }
+            }
+
+            // Start a new batch if needed.
+            if (mMsg.body.motion.action == AMOTION_EVENT_ACTION_MOVE
+                    || mMsg.body.motion.action == AMOTION_EVENT_ACTION_HOVER_MOVE) {
+                mBatches.push();
+                Batch& batch = mBatches.editTop();
+                batch.seq = mMsg.body.motion.seq;
+                initializeMotionEvent(&batch.event, &mMsg);
+#if DEBUG_TRANSPORT_ACTIONS
+                ALOGD("channel '%s' consumer ~ started batch event",
+                        mChannel->getName().string());
+#endif
+                break;
+            }
+
+            MotionEvent* motionEvent = factory->createMotionEvent();
+            if (! motionEvent) return NO_MEMORY;
+
+            initializeMotionEvent(motionEvent, &mMsg);
+            *outSeq = mMsg.body.motion.seq;
+            *outEvent = motionEvent;
+#if DEBUG_TRANSPORT_ACTIONS
+            ALOGD("channel '%s' consumer ~ consumed motion event, seq=%u",
+                    mChannel->getName().string(), *outSeq);
+#endif
+            break;
+        }
+
+        default:
+            ALOGE("channel '%s' consumer ~ Received unexpected message of type %d",
+                    mChannel->getName().string(), mMsg.header.type);
+            return UNKNOWN_ERROR;
+        }
     }
     return OK;
 }
 
-void InputConsumer::populateKeyEvent(KeyEvent* keyEvent) const {
-    keyEvent->initialize(
-            mSharedMessage->deviceId,
-            mSharedMessage->source,
-            mSharedMessage->key.action,
-            mSharedMessage->key.flags,
-            mSharedMessage->key.keyCode,
-            mSharedMessage->key.scanCode,
-            mSharedMessage->key.metaState,
-            mSharedMessage->key.repeatCount,
-            mSharedMessage->key.downTime,
-            mSharedMessage->key.eventTime);
-}
+status_t InputConsumer::sendFinishedSignal(uint32_t seq, bool handled) {
+#if DEBUG_TRANSPORT_ACTIONS
+    ALOGD("channel '%s' consumer ~ sendFinishedSignal: seq=%u, handled=%s",
+            mChannel->getName().string(), seq, handled ? "true" : "false");
+#endif
 
-void InputConsumer::populateMotionEvent(MotionEvent* motionEvent) const {
-    motionEvent->initialize(
-            mSharedMessage->deviceId,
-            mSharedMessage->source,
-            mSharedMessage->motion.action,
-            mSharedMessage->motion.flags,
-            mSharedMessage->motion.edgeFlags,
-            mSharedMessage->motion.metaState,
-            mSharedMessage->motion.buttonState,
-            mSharedMessage->motion.xOffset,
-            mSharedMessage->motion.yOffset,
-            mSharedMessage->motion.xPrecision,
-            mSharedMessage->motion.yPrecision,
-            mSharedMessage->motion.downTime,
-            mSharedMessage->motion.sampleData[0].eventTime,
-            mSharedMessage->motion.pointerCount,
-            mSharedMessage->motion.pointerProperties,
-            mSharedMessage->motion.sampleData[0].coords);
+    if (!seq) {
+        ALOGE("Attempted to send a finished signal with sequence number 0.");
+        return BAD_VALUE;
+    }
 
-    size_t sampleCount = mSharedMessage->motion.sampleCount;
-    if (sampleCount > 1) {
-        InputMessage::SampleData* sampleData = mSharedMessage->motion.sampleData;
-        size_t sampleDataStride = InputMessage::sampleDataStride(
-                mSharedMessage->motion.pointerCount);
-
-        while (--sampleCount > 0) {
-            sampleData = InputMessage::sampleDataPtrIncrement(sampleData, sampleDataStride);
-            motionEvent->addSample(sampleData->eventTime, sampleData->coords);
+    // Send finished signals for the batch sequence chain first.
+    size_t seqChainCount = mSeqChains.size();
+    if (seqChainCount) {
+        uint32_t currentSeq = seq;
+        uint32_t chainSeqs[seqChainCount];
+        size_t chainIndex = 0;
+        for (size_t i = seqChainCount; i-- > 0; ) {
+             const SeqChain& seqChain = mSeqChains.itemAt(i);
+             if (seqChain.seq == currentSeq) {
+                 currentSeq = seqChain.chain;
+                 chainSeqs[chainIndex++] = currentSeq;
+                 mSeqChains.removeAt(i);
+             }
+        }
+        status_t status = OK;
+        while (!status && chainIndex-- > 0) {
+            status = sendUnchainedFinishedSignal(chainSeqs[chainIndex], handled);
+        }
+        if (status) {
+            // An error occurred so at least one signal was not sent, reconstruct the chain.
+            do {
+                SeqChain seqChain;
+                seqChain.seq = chainIndex != 0 ? chainSeqs[chainIndex - 1] : seq;
+                seqChain.chain = chainSeqs[chainIndex];
+                mSeqChains.push(seqChain);
+            } while (chainIndex-- > 0);
+            return status;
         }
     }
+
+    // Send finished signal for the last message in the batch.
+    return sendUnchainedFinishedSignal(seq, handled);
+}
+
+status_t InputConsumer::sendUnchainedFinishedSignal(uint32_t seq, bool handled) {
+    InputMessage msg;
+    msg.header.type = InputMessage::TYPE_FINISHED;
+    msg.body.finished.seq = seq;
+    msg.body.finished.handled = handled;
+    return mChannel->sendMessage(&msg);
+}
+
+bool InputConsumer::hasPendingBatch() const {
+    return !mBatches.isEmpty();
+}
+
+ssize_t InputConsumer::findBatch(int32_t deviceId, int32_t source) const {
+    for (size_t i = 0; i < mBatches.size(); i++) {
+        const Batch& batch = mBatches.itemAt(i);
+        if (batch.event.getDeviceId() == deviceId && batch.event.getSource() == source) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+void InputConsumer::initializeKeyEvent(KeyEvent* event, const InputMessage* msg) {
+    event->initialize(
+            msg->body.key.deviceId,
+            msg->body.key.source,
+            msg->body.key.action,
+            msg->body.key.flags,
+            msg->body.key.keyCode,
+            msg->body.key.scanCode,
+            msg->body.key.metaState,
+            msg->body.key.repeatCount,
+            msg->body.key.downTime,
+            msg->body.key.eventTime);
+}
+
+void InputConsumer::initializeMotionEvent(MotionEvent* event, const InputMessage* msg) {
+    size_t pointerCount = msg->body.motion.pointerCount;
+    PointerProperties pointerProperties[pointerCount];
+    PointerCoords pointerCoords[pointerCount];
+    for (size_t i = 0; i < pointerCount; i++) {
+        pointerProperties[i].copyFrom(msg->body.motion.pointers[i].properties);
+        pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords);
+    }
+
+    event->initialize(
+            msg->body.motion.deviceId,
+            msg->body.motion.source,
+            msg->body.motion.action,
+            msg->body.motion.flags,
+            msg->body.motion.edgeFlags,
+            msg->body.motion.metaState,
+            msg->body.motion.buttonState,
+            msg->body.motion.xOffset,
+            msg->body.motion.yOffset,
+            msg->body.motion.xPrecision,
+            msg->body.motion.yPrecision,
+            msg->body.motion.downTime,
+            msg->body.motion.eventTime,
+            pointerCount,
+            pointerProperties,
+            pointerCoords);
+}
+
+bool InputConsumer::canAppendSamples(const MotionEvent* event, const InputMessage *msg) {
+    size_t pointerCount = msg->body.motion.pointerCount;
+    if (event->getPointerCount() != pointerCount
+            || event->getAction() != msg->body.motion.action) {
+        return false;
+    }
+    for (size_t i = 0; i < pointerCount; i++) {
+        if (*event->getPointerProperties(i) != msg->body.motion.pointers[i].properties) {
+            return false;
+        }
+    }
+    return true;
+}
+
+void InputConsumer::appendSamples(MotionEvent* event, const InputMessage* msg) {
+    size_t pointerCount = msg->body.motion.pointerCount;
+    PointerCoords pointerCoords[pointerCount];
+    for (size_t i = 0; i < pointerCount; i++) {
+        pointerCoords[i].copyFrom(msg->body.motion.pointers[i].coords);
+    }
+
+    event->setMetaState(event->getMetaState() | msg->body.motion.metaState);
+    event->addSample(msg->body.motion.eventTime, pointerCoords);
 }
 
 } // namespace android
diff --git a/libs/ui/tests/InputChannel_test.cpp b/libs/ui/tests/InputChannel_test.cpp
index eff22ee..ee422fe 100644
--- a/libs/ui/tests/InputChannel_test.cpp
+++ b/libs/ui/tests/InputChannel_test.cpp
@@ -20,8 +20,7 @@
 #include <gtest/gtest.h>
 #include <unistd.h>
 #include <time.h>
-#include <sys/mman.h>
-#include <cutils/ashmem.h>
+#include <errno.h>
 
 #include "../../utils/tests/TestHelpers.h"
 
@@ -36,35 +35,24 @@
 
 TEST_F(InputChannelTest, ConstructorAndDestructor_TakesOwnershipOfFileDescriptors) {
     // Our purpose here is to verify that the input channel destructor closes the
-    // file descriptors provided to it.  One easy way is to provide it with one end
+    // file descriptor provided to it.  One easy way is to provide it with one end
     // of a pipe and to check for EPIPE on the other end after the channel is destroyed.
-    Pipe fakeAshmem, sendPipe, receivePipe;
+    Pipe pipe;
 
-    sp<InputChannel> inputChannel = new InputChannel(String8("channel name"),
-            fakeAshmem.sendFd, receivePipe.receiveFd, sendPipe.sendFd);
+    sp<InputChannel> inputChannel = new InputChannel(String8("channel name"), pipe.sendFd);
 
     EXPECT_STREQ("channel name", inputChannel->getName().string())
             << "channel should have provided name";
-    EXPECT_EQ(fakeAshmem.sendFd, inputChannel->getAshmemFd())
-            << "channel should have provided ashmem fd";
-    EXPECT_EQ(receivePipe.receiveFd, inputChannel->getReceivePipeFd())
-            << "channel should have provided receive pipe fd";
-    EXPECT_EQ(sendPipe.sendFd, inputChannel->getSendPipeFd())
-            << "channel should have provided send pipe fd";
+    EXPECT_EQ(pipe.sendFd, inputChannel->getFd())
+            << "channel should have provided fd";
 
     inputChannel.clear(); // destroys input channel
 
-    EXPECT_EQ(-EPIPE, fakeAshmem.readSignal())
-            << "channel should have closed ashmem fd when destroyed";
-    EXPECT_EQ(-EPIPE, receivePipe.writeSignal())
-            << "channel should have closed receive pipe fd when destroyed";
-    EXPECT_EQ(-EPIPE, sendPipe.readSignal())
-            << "channel should have closed send pipe fd when destroyed";
+    EXPECT_EQ(-EPIPE, pipe.readSignal())
+            << "channel should have closed fd when destroyed";
 
     // clean up fds of Pipe endpoints that were closed so we don't try to close them again
-    fakeAshmem.sendFd = -1;
-    receivePipe.receiveFd = -1;
-    sendPipe.sendFd = -1;
+    pipe.sendFd = -1;
 }
 
 TEST_F(InputChannelTest, OpenInputChannelPair_ReturnsAPairOfConnectedChannels) {
@@ -82,43 +70,40 @@
     EXPECT_STREQ("channel name (client)", clientChannel->getName().string())
             << "client channel should have suffixed name";
 
-    // Ashmem uniqueness
-    EXPECT_NE(serverChannel->getAshmemFd(), clientChannel->getAshmemFd())
-            << "server and client channel should have different ashmem fds because it was dup'd";
-
-    // Ashmem usability
-    ssize_t serverAshmemSize = ashmem_get_size_region(serverChannel->getAshmemFd());
-    ssize_t clientAshmemSize = ashmem_get_size_region(clientChannel->getAshmemFd());
-    uint32_t* serverAshmem = static_cast<uint32_t*>(mmap(NULL, serverAshmemSize,
-            PROT_READ | PROT_WRITE, MAP_SHARED, serverChannel->getAshmemFd(), 0));
-    uint32_t* clientAshmem = static_cast<uint32_t*>(mmap(NULL, clientAshmemSize,
-            PROT_READ | PROT_WRITE, MAP_SHARED, clientChannel->getAshmemFd(), 0));
-    ASSERT_TRUE(serverAshmem != NULL)
-            << "server channel ashmem should be mappable";
-    ASSERT_TRUE(clientAshmem != NULL)
-            << "client channel ashmem should be mappable";
-    *serverAshmem = 0xf00dd00d;
-    EXPECT_EQ(0xf00dd00d, *clientAshmem)
-            << "ashmem buffer should be shared by client and server";
-    munmap(serverAshmem, serverAshmemSize);
-    munmap(clientAshmem, clientAshmemSize);
-
     // Server->Client communication
-    EXPECT_EQ(OK, serverChannel->sendSignal('S'))
-            << "server channel should be able to send signal to client channel";
-    char signal;
-    EXPECT_EQ(OK, clientChannel->receiveSignal(& signal))
-            << "client channel should be able to receive signal from server channel";
-    EXPECT_EQ('S', signal)
-            << "client channel should receive the correct signal from server channel";
+    InputMessage serverMsg;
+    memset(&serverMsg, 0, sizeof(InputMessage));
+    serverMsg.header.type = InputMessage::TYPE_KEY;
+    serverMsg.body.key.action = AKEY_EVENT_ACTION_DOWN;
+    EXPECT_EQ(OK, serverChannel->sendMessage(&serverMsg))
+            << "server channel should be able to send message to client channel";
+
+    InputMessage clientMsg;
+    EXPECT_EQ(OK, clientChannel->receiveMessage(&clientMsg))
+            << "client channel should be able to receive message from server channel";
+    EXPECT_EQ(serverMsg.header.type, clientMsg.header.type)
+            << "client channel should receive the correct message from server channel";
+    EXPECT_EQ(serverMsg.body.key.action, clientMsg.body.key.action)
+            << "client channel should receive the correct message from server channel";
 
     // Client->Server communication
-    EXPECT_EQ(OK, clientChannel->sendSignal('c'))
-            << "client channel should be able to send signal to server channel";
-    EXPECT_EQ(OK, serverChannel->receiveSignal(& signal))
-            << "server channel should be able to receive signal from client channel";
-    EXPECT_EQ('c', signal)
-            << "server channel should receive the correct signal from client channel";
+    InputMessage clientReply;
+    memset(&clientReply, 0, sizeof(InputMessage));
+    clientReply.header.type = InputMessage::TYPE_FINISHED;
+    clientReply.body.finished.seq = 0x11223344;
+    clientReply.body.finished.handled = true;
+    EXPECT_EQ(OK, clientChannel->sendMessage(&clientReply))
+            << "client channel should be able to send message to server channel";
+
+    InputMessage serverReply;
+    EXPECT_EQ(OK, serverChannel->receiveMessage(&serverReply))
+            << "server channel should be able to receive message from client channel";
+    EXPECT_EQ(clientReply.header.type, serverReply.header.type)
+            << "server channel should receive the correct message from client channel";
+    EXPECT_EQ(clientReply.body.finished.seq, serverReply.body.finished.seq)
+            << "server channel should receive the correct message from client channel";
+    EXPECT_EQ(clientReply.body.finished.handled, serverReply.body.finished.handled)
+            << "server channel should receive the correct message from client channel";
 }
 
 TEST_F(InputChannelTest, ReceiveSignal_WhenNoSignalPresent_ReturnsAnError) {
@@ -130,9 +115,9 @@
     ASSERT_EQ(OK, result)
             << "should have successfully opened a channel pair";
 
-    char signal;
-    EXPECT_EQ(WOULD_BLOCK, clientChannel->receiveSignal(& signal))
-            << "receiveSignal should have returned WOULD_BLOCK";
+    InputMessage msg;
+    EXPECT_EQ(WOULD_BLOCK, clientChannel->receiveMessage(&msg))
+            << "receiveMessage should have returned WOULD_BLOCK";
 }
 
 TEST_F(InputChannelTest, ReceiveSignal_WhenPeerClosed_ReturnsAnError) {
@@ -146,9 +131,9 @@
 
     serverChannel.clear(); // close server channel
 
-    char signal;
-    EXPECT_EQ(DEAD_OBJECT, clientChannel->receiveSignal(& signal))
-            << "receiveSignal should have returned DEAD_OBJECT";
+    InputMessage msg;
+    EXPECT_EQ(DEAD_OBJECT, clientChannel->receiveMessage(&msg))
+            << "receiveMessage should have returned DEAD_OBJECT";
 }
 
 TEST_F(InputChannelTest, SendSignal_WhenPeerClosed_ReturnsAnError) {
@@ -162,8 +147,10 @@
 
     serverChannel.clear(); // close server channel
 
-    EXPECT_EQ(DEAD_OBJECT, clientChannel->sendSignal('S'))
-            << "sendSignal should have returned DEAD_OBJECT";
+    InputMessage msg;
+    msg.header.type = InputMessage::TYPE_KEY;
+    EXPECT_EQ(DEAD_OBJECT, clientChannel->sendMessage(&msg))
+            << "sendMessage should have returned DEAD_OBJECT";
 }
 
 
diff --git a/libs/ui/tests/InputPublisherAndConsumer_test.cpp b/libs/ui/tests/InputPublisherAndConsumer_test.cpp
index fcc4cad..3303053 100644
--- a/libs/ui/tests/InputPublisherAndConsumer_test.cpp
+++ b/libs/ui/tests/InputPublisherAndConsumer_test.cpp
@@ -57,11 +57,8 @@
         clientChannel.clear();
     }
 
-    void Initialize();
     void PublishAndConsumeKeyEvent();
-    void PublishAndConsumeMotionEvent(
-            size_t samplesToAppendBeforeDispatch = 0,
-            size_t samplesToAppendAfterDispatch = 0);
+    void PublishAndConsumeMotionEvent();
 };
 
 TEST_F(InputPublisherAndConsumerTest, GetChannel_ReturnsTheChannel) {
@@ -69,21 +66,10 @@
     EXPECT_EQ(clientChannel.get(), mConsumer->getChannel().get());
 }
 
-void InputPublisherAndConsumerTest::Initialize() {
-    status_t status;
-
-    status = mPublisher->initialize();
-    ASSERT_EQ(OK, status)
-            << "publisher initialize should return OK";
-
-    status = mConsumer->initialize();
-    ASSERT_EQ(OK, status)
-            << "consumer initialize should return OK";
-}
-
 void InputPublisherAndConsumerTest::PublishAndConsumeKeyEvent() {
     status_t status;
 
+    const uint32_t seq = 15;
     const int32_t deviceId = 1;
     const int32_t source = AINPUT_SOURCE_KEYBOARD;
     const int32_t action = AKEY_EVENT_ACTION_DOWN;
@@ -95,21 +81,14 @@
     const nsecs_t downTime = 3;
     const nsecs_t eventTime = 4;
 
-    status = mPublisher->publishKeyEvent(deviceId, source, action, flags,
+    status = mPublisher->publishKeyEvent(seq, deviceId, source, action, flags,
             keyCode, scanCode, metaState, repeatCount, downTime, eventTime);
     ASSERT_EQ(OK, status)
             << "publisher publishKeyEvent should return OK";
 
-    status = mPublisher->sendDispatchSignal();
-    ASSERT_EQ(OK, status)
-            << "publisher sendDispatchSignal should return OK";
-
-    status = mConsumer->receiveDispatchSignal();
-    ASSERT_EQ(OK, status)
-            << "consumer receiveDispatchSignal should return OK";
-
+    uint32_t consumeSeq;
     InputEvent* event;
-    status = mConsumer->consume(& mEventFactory, & event);
+    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, &consumeSeq, &event);
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
@@ -119,6 +98,7 @@
             << "consumer should have returned a key event";
 
     KeyEvent* keyEvent = static_cast<KeyEvent*>(event);
+    EXPECT_EQ(seq, consumeSeq);
     EXPECT_EQ(deviceId, keyEvent->getDeviceId());
     EXPECT_EQ(source, keyEvent->getSource());
     EXPECT_EQ(action, keyEvent->getAction());
@@ -130,26 +110,25 @@
     EXPECT_EQ(downTime, keyEvent->getDownTime());
     EXPECT_EQ(eventTime, keyEvent->getEventTime());
 
-    status = mConsumer->sendFinishedSignal(true);
+    status = mConsumer->sendFinishedSignal(seq, true);
     ASSERT_EQ(OK, status)
             << "consumer sendFinishedSignal should return OK";
 
+    uint32_t finishedSeq = 0;
     bool handled = false;
-    status = mPublisher->receiveFinishedSignal(&handled);
+    status = mPublisher->receiveFinishedSignal(&finishedSeq, &handled);
     ASSERT_EQ(OK, status)
             << "publisher receiveFinishedSignal should return OK";
+    ASSERT_EQ(seq, finishedSeq)
+            << "publisher receiveFinishedSignal should have returned the original sequence number";
     ASSERT_TRUE(handled)
             << "publisher receiveFinishedSignal should have set handled to consumer's reply";
-
-    status = mPublisher->reset();
-    ASSERT_EQ(OK, status)
-            << "publisher reset should return OK";
 }
 
-void InputPublisherAndConsumerTest::PublishAndConsumeMotionEvent(
-        size_t samplesToAppendBeforeDispatch, size_t samplesToAppendAfterDispatch) {
+void InputPublisherAndConsumerTest::PublishAndConsumeMotionEvent() {
     status_t status;
 
+    const uint32_t seq = 15;
     const int32_t deviceId = 1;
     const int32_t source = AINPUT_SOURCE_TOUCHSCREEN;
     const int32_t action = AMOTION_EVENT_ACTION_MOVE;
@@ -163,67 +142,36 @@
     const float yPrecision = 0.5;
     const nsecs_t downTime = 3;
     const size_t pointerCount = 3;
+    const nsecs_t eventTime = 4;
     PointerProperties pointerProperties[pointerCount];
+    PointerCoords pointerCoords[pointerCount];
     for (size_t i = 0; i < pointerCount; i++) {
         pointerProperties[i].clear();
         pointerProperties[i].id = (i + 2) % pointerCount;
         pointerProperties[i].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+
+        pointerCoords[i].clear();
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_X, 100 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_Y, 200 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 0.5 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_SIZE, 0.7 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, 1.5 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, 1.7 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, 2.5 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, 2.7 * i);
+        pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, 3.5 * i);
     }
 
-    Vector<nsecs_t> sampleEventTimes;
-    Vector<PointerCoords> samplePointerCoords;
-
-    for (size_t i = 0; i <= samplesToAppendAfterDispatch + samplesToAppendBeforeDispatch; i++) {
-        sampleEventTimes.push(i + 10);
-        for (size_t j = 0; j < pointerCount; j++) {
-            samplePointerCoords.push();
-            PointerCoords& pc = samplePointerCoords.editTop();
-            pc.clear();
-            pc.setAxisValue(AMOTION_EVENT_AXIS_X, 100 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_Y, 200 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 0.5 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_SIZE, 0.7 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, 1.5 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, 1.7 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, 2.5 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, 2.7 * i + j);
-            pc.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, 3.5 * i + j);
-        }
-    }
-
-    status = mPublisher->publishMotionEvent(deviceId, source, action, flags, edgeFlags,
+    status = mPublisher->publishMotionEvent(seq, deviceId, source, action, flags, edgeFlags,
             metaState, buttonState, xOffset, yOffset, xPrecision, yPrecision,
-            downTime, sampleEventTimes[0], pointerCount,
-            pointerProperties, samplePointerCoords.array());
+            downTime, eventTime, pointerCount,
+            pointerProperties, pointerCoords);
     ASSERT_EQ(OK, status)
             << "publisher publishMotionEvent should return OK";
 
-    for (size_t i = 0; i < samplesToAppendBeforeDispatch; i++) {
-        size_t sampleIndex = i + 1;
-        status = mPublisher->appendMotionSample(sampleEventTimes[sampleIndex],
-                samplePointerCoords.array() + sampleIndex * pointerCount);
-        ASSERT_EQ(OK, status)
-                << "publisher appendMotionEvent should return OK";
-    }
-
-    status = mPublisher->sendDispatchSignal();
-    ASSERT_EQ(OK, status)
-            << "publisher sendDispatchSignal should return OK";
-
-    for (size_t i = 0; i < samplesToAppendAfterDispatch; i++) {
-        size_t sampleIndex = i + 1 + samplesToAppendBeforeDispatch;
-        status = mPublisher->appendMotionSample(sampleEventTimes[sampleIndex],
-                samplePointerCoords.array() + sampleIndex * pointerCount);
-        ASSERT_EQ(OK, status)
-                << "publisher appendMotionEvent should return OK";
-    }
-
-    status = mConsumer->receiveDispatchSignal();
-    ASSERT_EQ(OK, status)
-            << "consumer receiveDispatchSignal should return OK";
-
+    uint32_t consumeSeq;
     InputEvent* event;
-    status = mConsumer->consume(& mEventFactory, & event);
+    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, &consumeSeq, &event);
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
@@ -232,9 +180,8 @@
     ASSERT_EQ(AINPUT_EVENT_TYPE_MOTION, event->getType())
             << "consumer should have returned a motion event";
 
-    size_t lastSampleIndex = samplesToAppendBeforeDispatch + samplesToAppendAfterDispatch;
-
     MotionEvent* motionEvent = static_cast<MotionEvent*>(event);
+    EXPECT_EQ(seq, consumeSeq);
     EXPECT_EQ(deviceId, motionEvent->getDeviceId());
     EXPECT_EQ(source, motionEvent->getSource());
     EXPECT_EQ(action, motionEvent->getAction());
@@ -245,150 +192,69 @@
     EXPECT_EQ(xPrecision, motionEvent->getXPrecision());
     EXPECT_EQ(yPrecision, motionEvent->getYPrecision());
     EXPECT_EQ(downTime, motionEvent->getDownTime());
-    EXPECT_EQ(sampleEventTimes[lastSampleIndex], motionEvent->getEventTime());
+    EXPECT_EQ(eventTime, motionEvent->getEventTime());
     EXPECT_EQ(pointerCount, motionEvent->getPointerCount());
-    EXPECT_EQ(lastSampleIndex, motionEvent->getHistorySize());
+    EXPECT_EQ(0U, motionEvent->getHistorySize());
 
     for (size_t i = 0; i < pointerCount; i++) {
         SCOPED_TRACE(i);
         EXPECT_EQ(pointerProperties[i].id, motionEvent->getPointerId(i));
         EXPECT_EQ(pointerProperties[i].toolType, motionEvent->getToolType(i));
-    }
 
-    for (size_t sampleIndex = 0; sampleIndex < lastSampleIndex; sampleIndex++) {
-        SCOPED_TRACE(sampleIndex);
-        EXPECT_EQ(sampleEventTimes[sampleIndex],
-                motionEvent->getHistoricalEventTime(sampleIndex));
-        for (size_t i = 0; i < pointerCount; i++) {
-            SCOPED_TRACE(i);
-            size_t offset = sampleIndex * pointerCount + i;
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_X),
-                    motionEvent->getHistoricalRawX(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_Y),
-                    motionEvent->getHistoricalRawY(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_X) + xOffset,
-                    motionEvent->getHistoricalX(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_Y) + yOffset,
-                    motionEvent->getHistoricalY(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
-                    motionEvent->getHistoricalPressure(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_SIZE),
-                    motionEvent->getHistoricalSize(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
-                    motionEvent->getHistoricalTouchMajor(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
-                    motionEvent->getHistoricalTouchMinor(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
-                    motionEvent->getHistoricalToolMajor(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
-                    motionEvent->getHistoricalToolMinor(i, sampleIndex));
-            EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
-                    motionEvent->getHistoricalOrientation(i, sampleIndex));
-        }
-    }
-
-    SCOPED_TRACE(lastSampleIndex);
-    EXPECT_EQ(sampleEventTimes[lastSampleIndex], motionEvent->getEventTime());
-    for (size_t i = 0; i < pointerCount; i++) {
-        SCOPED_TRACE(i);
-        size_t offset = lastSampleIndex * pointerCount + i;
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_X),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_X),
                 motionEvent->getRawX(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_Y),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_Y),
                 motionEvent->getRawY(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_X) + xOffset,
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_X) + xOffset,
                 motionEvent->getX(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_Y) + yOffset,
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_Y) + yOffset,
                 motionEvent->getY(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
                 motionEvent->getPressure(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_SIZE),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_SIZE),
                 motionEvent->getSize(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
                 motionEvent->getTouchMajor(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
                 motionEvent->getTouchMinor(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
                 motionEvent->getToolMajor(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
                 motionEvent->getToolMinor(i));
-        EXPECT_EQ(samplePointerCoords[offset].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
+        EXPECT_EQ(pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
                 motionEvent->getOrientation(i));
     }
 
-    status = mConsumer->sendFinishedSignal(false);
+    status = mConsumer->sendFinishedSignal(seq, false);
     ASSERT_EQ(OK, status)
             << "consumer sendFinishedSignal should return OK";
 
+    uint32_t finishedSeq = 0;
     bool handled = true;
-    status = mPublisher->receiveFinishedSignal(&handled);
+    status = mPublisher->receiveFinishedSignal(&finishedSeq, &handled);
     ASSERT_EQ(OK, status)
             << "publisher receiveFinishedSignal should return OK";
+    ASSERT_EQ(seq, finishedSeq)
+            << "publisher receiveFinishedSignal should have returned the original sequence number";
     ASSERT_FALSE(handled)
             << "publisher receiveFinishedSignal should have set handled to consumer's reply";
-
-    status = mPublisher->reset();
-    ASSERT_EQ(OK, status)
-            << "publisher reset should return OK";
 }
 
 TEST_F(InputPublisherAndConsumerTest, PublishKeyEvent_EndToEnd) {
-    ASSERT_NO_FATAL_FAILURE(Initialize());
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
 }
 
-TEST_F(InputPublisherAndConsumerTest, PublishKeyEvent_WhenNotReset_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    status = mPublisher->publishKeyEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    ASSERT_EQ(OK, status)
-            << "publisher publishKeyEvent should return OK first time";
-
-    status = mPublisher->publishKeyEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    ASSERT_EQ(INVALID_OPERATION, status)
-            << "publisher publishKeyEvent should return INVALID_OPERATION because "
-                    "the publisher was not reset";
-}
-
 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_EndToEnd) {
-    ASSERT_NO_FATAL_FAILURE(Initialize());
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
 }
 
-TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenNotReset_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    const size_t pointerCount = 1;
-    PointerProperties pointerProperties[pointerCount];
-    PointerCoords pointerCoords[pointerCount];
-    for (size_t i = 0; i < pointerCount; i++) {
-        pointerProperties[i].clear();
-        pointerCoords[i].clear();
-    }
-
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(OK, status)
-            << "publisher publishMotionEvent should return OK";
-
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(INVALID_OPERATION, status)
-            << "publisher publishMotionEvent should return INVALID_OPERATION because ";
-                    "the publisher was not reset";
-}
-
 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenPointerCountLessThan1_ReturnsError) {
     status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
     const size_t pointerCount = 0;
     PointerProperties pointerProperties[pointerCount];
     PointerCoords pointerCoords[pointerCount];
 
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status)
             << "publisher publishMotionEvent should return BAD_VALUE";
@@ -396,8 +262,6 @@
 
 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenPointerCountGreaterThanMax_ReturnsError) {
     status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
     const size_t pointerCount = MAX_POINTERS + 1;
     PointerProperties pointerProperties[pointerCount];
     PointerCoords pointerCoords[pointerCount];
@@ -406,14 +270,13 @@
         pointerCoords[i].clear();
     }
 
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status)
             << "publisher publishMotionEvent should return BAD_VALUE";
 }
 
 TEST_F(InputPublisherAndConsumerTest, PublishMultipleEvents_EndToEnd) {
-    ASSERT_NO_FATAL_FAILURE(Initialize());
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent());
@@ -421,111 +284,4 @@
     ASSERT_NO_FATAL_FAILURE(PublishAndConsumeKeyEvent());
 }
 
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenCalledBeforeDispatchSignal_AppendsSamples) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-    ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent(3, 0));
-}
-
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenCalledAfterDispatchSignalAndNotConsumed_AppendsSamples) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-    ASSERT_NO_FATAL_FAILURE(PublishAndConsumeMotionEvent(0, 4));
-}
-
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenNoMotionEventPublished_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    PointerCoords pointerCoords[1];
-    status = mPublisher->appendMotionSample(0, pointerCoords);
-    ASSERT_EQ(INVALID_OPERATION, status)
-            << "publisher appendMotionSample should return INVALID_OPERATION";
-}
-
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenPublishedMotionEventIsNotAMove_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    const size_t pointerCount = MAX_POINTERS;
-    PointerProperties pointerProperties[pointerCount];
-    PointerCoords pointerCoords[pointerCount];
-    for (size_t i = 0; i < pointerCount; i++) {
-        pointerProperties[i].clear();
-        pointerCoords[i].clear();
-    }
-
-    status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_DOWN,
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(OK, status);
-
-    status = mPublisher->appendMotionSample(0, pointerCoords);
-    ASSERT_EQ(INVALID_OPERATION, status)
-            << "publisher appendMotionSample should return INVALID_OPERATION";
-}
-
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenAlreadyConsumed_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    const size_t pointerCount = MAX_POINTERS;
-    PointerProperties pointerProperties[pointerCount];
-    PointerCoords pointerCoords[pointerCount];
-    for (size_t i = 0; i < pointerCount; i++) {
-        pointerProperties[i].clear();
-        pointerCoords[i].clear();
-    }
-
-    status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_MOVE,
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(OK, status);
-
-    status = mPublisher->sendDispatchSignal();
-    ASSERT_EQ(OK, status);
-
-    status = mConsumer->receiveDispatchSignal();
-    ASSERT_EQ(OK, status);
-
-    InputEvent* event;
-    status = mConsumer->consume(& mEventFactory, & event);
-    ASSERT_EQ(OK, status);
-
-    status = mPublisher->appendMotionSample(0, pointerCoords);
-    ASSERT_EQ(status_t(FAILED_TRANSACTION), status)
-            << "publisher appendMotionSample should return FAILED_TRANSACTION";
-}
-
-TEST_F(InputPublisherAndConsumerTest, AppendMotionSample_WhenBufferFull_ReturnsError) {
-    status_t status;
-    ASSERT_NO_FATAL_FAILURE(Initialize());
-
-    const size_t pointerCount = MAX_POINTERS;
-    PointerProperties pointerProperties[pointerCount];
-    PointerCoords pointerCoords[pointerCount];
-    for (size_t i = 0; i < pointerCount; i++) {
-        pointerProperties[i].clear();
-        pointerCoords[i].clear();
-    }
-
-    status = mPublisher->publishMotionEvent(0, 0, AMOTION_EVENT_ACTION_MOVE,
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(OK, status);
-
-    for (int count = 1;; count++) {
-        ASSERT_LT(count, 100000) << "should eventually reach OOM";
-
-        status = mPublisher->appendMotionSample(0, pointerCoords);
-        if (status != OK) {
-            ASSERT_GT(count, 12) << "should be able to add at least a dozen samples";
-            ASSERT_EQ(NO_MEMORY, status)
-                    << "publisher appendMotionSample should return NO_MEMORY when buffer is full";
-            break;
-        }
-    }
-
-    status = mPublisher->appendMotionSample(0, pointerCoords);
-    ASSERT_EQ(NO_MEMORY, status)
-            << "publisher appendMotionSample should return NO_MEMORY persistently until reset";
-}
-
 } // namespace android
diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index 06be2ef..0b1016c 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -118,12 +118,6 @@
 
 // ----------------------------------------------------------------------------
 
-Loader::entry_t::entry_t(int dpy, int impl, const char* tag)
-    : dpy(dpy), impl(impl), tag(tag) {
-}
-
-// ----------------------------------------------------------------------------
-
 Loader::Loader()
 {
     char line[256];
@@ -131,8 +125,9 @@
 
     /* Special case for GLES emulation */
     if (checkGlesEmulationStatus() == 0) {
-        ALOGD("Emulator without GPU support detected. Fallback to software renderer.");
-        gConfig.add( entry_t(0, 0, "android") );
+        ALOGD("Emulator without GPU support detected. "
+              "Fallback to software renderer.");
+        mDriverTag.setTo("android");
         return;
     }
 
@@ -141,14 +136,16 @@
     if (cfg == NULL) {
         // default config
         ALOGD("egl.cfg not found, using default config");
-        gConfig.add( entry_t(0, 0, "android") );
+        mDriverTag.setTo("android");
     } else {
         while (fgets(line, 256, cfg)) {
-            int dpy;
-            int impl;
+            int dpy, impl;
             if (sscanf(line, "%u %u %s", &dpy, &impl, tag) == 3) {
                 //ALOGD(">>> %u %u %s", dpy, impl, tag);
-                gConfig.add( entry_t(dpy, impl, tag) );
+                // We only load the h/w accelerated implementation
+                if (tag != String8("android")) {
+                    mDriverTag = tag;
+                }
             }
         }
         fclose(cfg);
@@ -160,30 +157,12 @@
     GLTrace_stop();
 }
 
-const char* Loader::getTag(int dpy, int impl)
+void* Loader::open(egl_connection_t* cnx)
 {
-    const Vector<entry_t>& cfgs(gConfig);    
-    const size_t c = cfgs.size();
-    for (size_t i=0 ; i<c ; i++) {
-        if (dpy == cfgs[i].dpy)
-            if (impl == cfgs[i].impl)
-                return cfgs[i].tag.string();
-    }
-    return 0;
-}
-
-void* Loader::open(EGLNativeDisplayType display, int impl, egl_connection_t* cnx)
-{
-    /*
-     * TODO: if we don't find display/0, then use 0/0
-     * (0/0 should always work)
-     */
-    
     void* dso;
-    int index = int(display);
     driver_t* hnd = 0;
     
-    char const* tag = getTag(index, impl);
+    char const* tag = mDriverTag.string();
     if (tag) {
         dso = load_driver("GLES", tag, cnx, EGL | GLESv1_CM | GLESv2);
         if (dso) {
@@ -193,16 +172,14 @@
             dso = load_driver("EGL", tag, cnx, EGL);
             if (dso) {
                 hnd = new driver_t(dso);
-
                 // TODO: make this more automated
                 hnd->set( load_driver("GLESv1_CM", tag, cnx, GLESv1_CM), GLESv1_CM );
-
-                hnd->set( load_driver("GLESv2", tag, cnx, GLESv2), GLESv2 );
+                hnd->set( load_driver("GLESv2",    tag, cnx, GLESv2),    GLESv2 );
             }
         }
     }
 
-    LOG_FATAL_IF(!index && !impl && !hnd, 
+    LOG_FATAL_IF(!index && !hnd,
             "couldn't find the default OpenGL ES implementation "
             "for default display");
     
@@ -221,7 +198,7 @@
         __eglMustCastToProperFunctionPointerType* curr, 
         getProcAddressType getProcAddress) 
 {
-    const size_t SIZE = 256;
+    const ssize_t SIZE = 256;
     char scrap[SIZE];
     while (*api) {
         char const * name = *api;
@@ -326,14 +303,14 @@
     if (mask & GLESv1_CM) {
         init_api(dso, gl_names,
             (__eglMustCastToProperFunctionPointerType*)
-                &cnx->hooks[GLESv1_INDEX]->gl,
+                &cnx->hooks[egl_connection_t::GLESv1_INDEX]->gl,
             getProcAddress);
     }
 
     if (mask & GLESv2) {
       init_api(dso, gl_names,
             (__eglMustCastToProperFunctionPointerType*)
-                &cnx->hooks[GLESv2_INDEX]->gl,
+                &cnx->hooks[egl_connection_t::GLESv2_INDEX]->gl,
             getProcAddress);
     }
     
diff --git a/opengl/libs/EGL/Loader.h b/opengl/libs/EGL/Loader.h
index 580d6e4..30773cb 100644
--- a/opengl/libs/EGL/Loader.h
+++ b/opengl/libs/EGL/Loader.h
@@ -24,7 +24,6 @@
 #include <utils/Errors.h>
 #include <utils/Singleton.h>
 #include <utils/String8.h>
-#include <utils/Vector.h>
 
 #include <EGL/egl.h>
 
@@ -53,23 +52,13 @@
         void* dso[3];
     };
     
-    struct entry_t {
-        entry_t() { }
-        entry_t(int dpy, int impl, const char* tag);
-        int dpy;
-        int impl;
-        String8 tag;
-    };
-
-    Vector<entry_t> gConfig;    
+    String8 mDriverTag;
     getProcAddressType getProcAddress;
     
-    const char* getTag(int dpy, int impl);
-
 public:
     ~Loader();
     
-    void* open(EGLNativeDisplayType display, int impl, egl_connection_t* cnx);
+    void* open(egl_connection_t* cnx);
     status_t close(void* driver);
     
 private:
diff --git a/opengl/libs/EGL/egl.cpp b/opengl/libs/EGL/egl.cpp
index 83933e5..4a56dcf 100644
--- a/opengl/libs/EGL/egl.cpp
+++ b/opengl/libs/EGL/egl.cpp
@@ -48,8 +48,8 @@
 namespace android {
 // ----------------------------------------------------------------------------
 
-egl_connection_t gEGLImpl[IMPL_NUM_IMPLEMENTATIONS];
-gl_hooks_t gHooks[2][IMPL_NUM_IMPLEMENTATIONS];
+egl_connection_t gEGLImpl;
+gl_hooks_t gHooks[2];
 gl_hooks_t gHooksNoContext;
 pthread_key_t gGLWrapperKey = -1;
 
@@ -187,16 +187,13 @@
     return dp;
 }
 
-egl_connection_t* validate_display_config(EGLDisplay dpy, EGLConfig config,
+egl_connection_t* validate_display_config(EGLDisplay dpy, EGLConfig,
         egl_display_t const*& dp) {
     dp = validate_display(dpy);
     if (!dp)
         return (egl_connection_t*) NULL;
 
-    if (intptr_t(config) >= dp->numTotalConfigs) {
-        return setError(EGL_BAD_CONFIG, (egl_connection_t*)NULL);
-    }
-    egl_connection_t* const cnx = &gEGLImpl[dp->configs[intptr_t(config)].impl];
+    egl_connection_t* const cnx = &gEGLImpl;
     if (cnx->dso == 0) {
         return setError(EGL_BAD_CONFIG, (egl_connection_t*)NULL);
     }
@@ -228,7 +225,7 @@
     // EGL.
 
     egl_image_t const * const i = get_image(image);
-    return i->images[c->impl];
+    return i->image;
 }
 
 // ----------------------------------------------------------------------------
@@ -266,34 +263,17 @@
     // get our driver loader
     Loader& loader(Loader::getInstance());
 
-    // dynamically load all our EGL implementations
-    egl_connection_t* cnx;
-
-    cnx = &gEGLImpl[IMPL_SOFTWARE];
+    // dynamically load our EGL implementation
+    egl_connection_t* cnx = &gEGLImpl;
     if (cnx->dso == 0) {
-        cnx->hooks[GLESv1_INDEX] = &gHooks[GLESv1_INDEX][IMPL_SOFTWARE];
-        cnx->hooks[GLESv2_INDEX] = &gHooks[GLESv2_INDEX][IMPL_SOFTWARE];
-        cnx->dso = loader.open(EGL_DEFAULT_DISPLAY, 0, cnx);
+        cnx->hooks[egl_connection_t::GLESv1_INDEX] =
+                &gHooks[egl_connection_t::GLESv1_INDEX];
+        cnx->hooks[egl_connection_t::GLESv2_INDEX] =
+                &gHooks[egl_connection_t::GLESv2_INDEX];
+        cnx->dso = loader.open(cnx);
     }
 
-    cnx = &gEGLImpl[IMPL_HARDWARE];
-    if (cnx->dso == 0) {
-        char value[PROPERTY_VALUE_MAX];
-        property_get("debug.egl.hw", value, "1");
-        if (atoi(value) != 0) {
-            cnx->hooks[GLESv1_INDEX] = &gHooks[GLESv1_INDEX][IMPL_HARDWARE];
-            cnx->hooks[GLESv2_INDEX] = &gHooks[GLESv2_INDEX][IMPL_HARDWARE];
-            cnx->dso = loader.open(EGL_DEFAULT_DISPLAY, 1, cnx);
-        } else {
-            ALOGD("3D hardware acceleration is disabled");
-        }
-    }
-
-    if (!gEGLImpl[IMPL_SOFTWARE].dso && !gEGLImpl[IMPL_HARDWARE].dso) {
-        return EGL_FALSE;
-    }
-
-    return EGL_TRUE;
+    return cnx->dso ? EGL_TRUE : EGL_FALSE;
 }
 
 static pthread_mutex_t sInitDriverMutex = PTHREAD_MUTEX_INITIALIZER;
diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index 73aab26..bb2783d 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -44,6 +44,7 @@
 #include "egl_impl.h"
 #include "egl_object.h"
 #include "egl_tls.h"
+#include "egldefs.h"
 
 using namespace android;
 
@@ -88,24 +89,6 @@
 
 // ----------------------------------------------------------------------------
 
-template<typename T>
-static __attribute__((noinline))
-int binarySearch(T const sortedArray[], int first, int last, T key) {
-    while (first <= last) {
-        int mid = (first + last) / 2;
-        if (sortedArray[mid] < key) {
-            first = mid + 1;
-        } else if (key < sortedArray[mid]) {
-            last = mid - 1;
-        } else {
-            return mid;
-        }
-    }
-    return -1;
-}
-
-// ----------------------------------------------------------------------------
-
 namespace android {
 extern void setGLHooksThreadSpecific(gl_hooks_t const *value);
 extern EGLBoolean egl_init_drivers();
@@ -183,21 +166,20 @@
     egl_display_t const * const dp = validate_display(dpy);
     if (!dp) return EGL_FALSE;
 
-    GLint numConfigs = dp->numTotalConfigs;
-    if (!configs) {
-        *num_config = numConfigs;
-        return EGL_TRUE;
+    if (num_config==0) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
     }
 
-    GLint n = 0;
-    for (intptr_t i=0 ; i<dp->numTotalConfigs && config_size ; i++) {
-        *configs++ = EGLConfig(i);
-        config_size--;
-        n++;
+    EGLBoolean res = EGL_FALSE;
+    *num_config = 0;
+
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso) {
+        res = cnx->egl.eglGetConfigs(
+                dp->disp.dpy, configs, config_size, num_config);
     }
-    
-    *num_config = n;
-    return EGL_TRUE;
+
+    return res;
 }
 
 EGLBoolean eglChooseConfig( EGLDisplay dpy, const EGLint *attrib_list,
@@ -213,105 +195,13 @@
         return setError(EGL_BAD_PARAMETER, EGL_FALSE);
     }
 
-    EGLint n;
     EGLBoolean res = EGL_FALSE;
     *num_config = 0;
 
-    
-    // It is unfortunate, but we need to remap the EGL_CONFIG_IDs, 
-    // to do this, we have to go through the attrib_list array once
-    // to figure out both its size and if it contains an EGL_CONFIG_ID
-    // key. If so, the full array is copied and patched.
-    // NOTE: we assume that there can be only one occurrence
-    // of EGL_CONFIG_ID.
-    
-    EGLint patch_index = -1;
-    GLint attr;
-    size_t size = 0;
-    if (attrib_list) {
-        while ((attr=attrib_list[size]) != EGL_NONE) {
-            if (attr == EGL_CONFIG_ID)
-                patch_index = size;
-            size += 2;
-        }
-    }
-    if (patch_index >= 0) {
-        size += 2; // we need copy the sentinel as well
-        EGLint* new_list = (EGLint*)malloc(size*sizeof(EGLint));
-        if (new_list == 0)
-            return setError(EGL_BAD_ALLOC, EGL_FALSE);
-        memcpy(new_list, attrib_list, size*sizeof(EGLint));
-
-        // patch the requested EGL_CONFIG_ID
-        bool found = false;
-        EGLConfig ourConfig(0);
-        EGLint& configId(new_list[patch_index+1]);
-        for (intptr_t i=0 ; i<dp->numTotalConfigs ; i++) {
-            if (dp->configs[i].configId == configId) {
-                ourConfig = EGLConfig(i);
-                configId = dp->configs[i].implConfigId;
-                found = true;
-                break;
-            }
-        }
-
-        egl_connection_t* const cnx = &gEGLImpl[dp->configs[intptr_t(ourConfig)].impl];
-        if (found && cnx->dso) {
-            // and switch to the new list
-            attrib_list = const_cast<const EGLint *>(new_list);
-
-            // At this point, the only configuration that can match is
-            // dp->configs[i][index], however, we don't know if it would be
-            // rejected because of the other attributes, so we do have to call
-            // cnx->egl.eglChooseConfig() -- but we don't have to loop
-            // through all the EGLimpl[].
-            // We also know we can only get a single config back, and we know
-            // which one.
-
-            res = cnx->egl.eglChooseConfig(
-                    dp->disp[ dp->configs[intptr_t(ourConfig)].impl ].dpy,
-                    attrib_list, configs, config_size, &n);
-            if (res && n>0) {
-                // n has to be 0 or 1, by construction, and we already know
-                // which config it will return (since there can be only one).
-                if (configs) {
-                    configs[0] = ourConfig;
-                }
-                *num_config = 1;
-            }
-        }
-
-        free(const_cast<EGLint *>(attrib_list));
-        return res;
-    }
-
-
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso) {
-            if (cnx->egl.eglChooseConfig(
-                    dp->disp[i].dpy, attrib_list, configs, config_size, &n)) {
-                if (configs) {
-                    // now we need to convert these client EGLConfig to our
-                    // internal EGLConfig format.
-                    // This is done in O(n Log(n)) time.
-                    for (int j=0 ; j<n ; j++) {
-                        egl_config_t key(i, configs[j]);
-                        intptr_t index = binarySearch<egl_config_t>(
-                                dp->configs, 0, dp->numTotalConfigs, key);
-                        if (index >= 0) {
-                            configs[j] = EGLConfig(index);
-                        } else {
-                            return setError(EGL_BAD_CONFIG, EGL_FALSE);
-                        }
-                    }
-                    configs += n;
-                    config_size -= n;
-                }
-                *num_config += n;
-                res = EGL_TRUE;
-            }
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso) {
+        res = cnx->egl.eglChooseConfig(
+                dp->disp.dpy, attrib_list, configs, config_size, num_config);
     }
     return res;
 }
@@ -325,13 +215,8 @@
     egl_connection_t* cnx = validate_display_config(dpy, config, dp);
     if (!cnx) return EGL_FALSE;
     
-    if (attribute == EGL_CONFIG_ID) {
-        *value = dp->configs[intptr_t(config)].configId;
-        return EGL_TRUE;
-    }
     return cnx->egl.eglGetConfigAttrib(
-            dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
-            dp->configs[intptr_t(config)].config, attribute, value);
+            dp->disp.dpy, config, attribute, value);
 }
 
 // ----------------------------------------------------------------------------
@@ -347,8 +232,7 @@
     egl_display_t const* dp = 0;
     egl_connection_t* cnx = validate_display_config(dpy, config, dp);
     if (cnx) {
-        EGLDisplay iDpy = dp->disp[ dp->configs[intptr_t(config)].impl ].dpy;
-        EGLConfig iConfig = dp->configs[intptr_t(config)].config;
+        EGLDisplay iDpy = dp->disp.dpy;
         EGLint format;
 
         if (native_window_api_connect(window, NATIVE_WINDOW_API_EGL) != OK) {
@@ -359,7 +243,7 @@
 
         // set the native window's buffers format to match this config
         if (cnx->egl.eglGetConfigAttrib(iDpy,
-                iConfig, EGL_NATIVE_VISUAL_ID, &format)) {
+                config, EGL_NATIVE_VISUAL_ID, &format)) {
             if (format != 0) {
                 int err = native_window_set_buffers_format(window, format);
                 if (err != 0) {
@@ -377,10 +261,9 @@
         anw->setSwapInterval(anw, 1);
 
         EGLSurface surface = cnx->egl.eglCreateWindowSurface(
-                iDpy, iConfig, window, attrib_list);
+                iDpy, config, window, attrib_list);
         if (surface != EGL_NO_SURFACE) {
-            egl_surface_t* s = new egl_surface_t(dpy, config, window, surface,
-                    dp->configs[intptr_t(config)].impl, cnx);
+            egl_surface_t* s = new egl_surface_t(dpy, config, window, surface, cnx);
             return s;
         }
 
@@ -401,11 +284,9 @@
     egl_connection_t* cnx = validate_display_config(dpy, config, dp);
     if (cnx) {
         EGLSurface surface = cnx->egl.eglCreatePixmapSurface(
-                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
-                dp->configs[intptr_t(config)].config, pixmap, attrib_list);
+                dp->disp.dpy, config, pixmap, attrib_list);
         if (surface != EGL_NO_SURFACE) {
-            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface,
-                    dp->configs[intptr_t(config)].impl, cnx);
+            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface, cnx);
             return s;
         }
     }
@@ -421,11 +302,9 @@
     egl_connection_t* cnx = validate_display_config(dpy, config, dp);
     if (cnx) {
         EGLSurface surface = cnx->egl.eglCreatePbufferSurface(
-                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
-                dp->configs[intptr_t(config)].config, attrib_list);
+                dp->disp.dpy, config, attrib_list);
         if (surface != EGL_NO_SURFACE) {
-            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface,
-                    dp->configs[intptr_t(config)].impl, cnx);
+            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface, cnx);
             return s;
         }
     }
@@ -444,8 +323,7 @@
         return setError(EGL_BAD_SURFACE, EGL_FALSE);
 
     egl_surface_t * const s = get_surface(surface);
-    EGLBoolean result = s->cnx->egl.eglDestroySurface(
-            dp->disp[s->impl].dpy, s->surface);
+    EGLBoolean result = s->cnx->egl.eglDestroySurface(dp->disp.dpy, s->surface);
     if (result == EGL_TRUE) {
         _s.terminate();
     }
@@ -465,16 +343,8 @@
         return setError(EGL_BAD_SURFACE, EGL_FALSE);
 
     egl_surface_t const * const s = get_surface(surface);
-    EGLBoolean result(EGL_TRUE);
-    if (attribute == EGL_CONFIG_ID) {
-        // We need to remap EGL_CONFIG_IDs
-        *value = dp->configs[intptr_t(s->config)].configId;
-    } else {
-        result = s->cnx->egl.eglQuerySurface(
-                dp->disp[s->impl].dpy, s->surface, attribute, value);
-    }
-
-    return result;
+    return s->cnx->egl.eglQuerySurface(
+            dp->disp.dpy, s->surface, attribute, value);
 }
 
 void EGLAPI eglBeginFrame(EGLDisplay dpy, EGLSurface surface) {
@@ -514,9 +384,7 @@
             share_list = c->context;
         }
         EGLContext context = cnx->egl.eglCreateContext(
-                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
-                dp->configs[intptr_t(config)].config,
-                share_list, attrib_list);
+                dp->disp.dpy, config, share_list, attrib_list);
         if (context != EGL_NO_CONTEXT) {
             // figure out if it's a GLESv1 or GLESv2
             int version = 0;
@@ -526,15 +394,14 @@
                     GLint value = *attrib_list++;
                     if (attr == EGL_CONTEXT_CLIENT_VERSION) {
                         if (value == 1) {
-                            version = GLESv1_INDEX;
+                            version = egl_connection_t::GLESv1_INDEX;
                         } else if (value == 2) {
-                            version = GLESv2_INDEX;
+                            version = egl_connection_t::GLESv2_INDEX;
                         }
                     }
                 };
             }
-            egl_context_t* c = new egl_context_t(dpy, context, config,
-                    dp->configs[intptr_t(config)].impl, cnx, version);
+            egl_context_t* c = new egl_context_t(dpy, context, config, cnx, version);
 #if EGL_TRACE
             if (gEGLDebugLevel > 0)
                 GLTrace_eglCreateContext(version, c);
@@ -558,8 +425,7 @@
         return setError(EGL_BAD_CONTEXT, EGL_FALSE);
     
     egl_context_t * const c = get_context(ctx);
-    EGLBoolean result = c->cnx->egl.eglDestroyContext(
-            dp->disp[c->impl].dpy, c->context);
+    EGLBoolean result = c->cnx->egl.eglDestroyContext(dp->disp.dpy, c->context);
     if (result == EGL_TRUE) {
         _c.terminate();
     }
@@ -625,20 +491,12 @@
     // retrieve the underlying implementation's draw EGLSurface
     if (draw != EGL_NO_SURFACE) {
         d = get_surface(draw);
-        // make sure the EGLContext and EGLSurface passed in are for
-        // the same driver
-        if (c && d->impl != c->impl)
-            return setError(EGL_BAD_MATCH, EGL_FALSE);
         impl_draw = d->surface;
     }
 
     // retrieve the underlying implementation's read EGLSurface
     if (read != EGL_NO_SURFACE) {
         r = get_surface(read);
-        // make sure the EGLContext and EGLSurface passed in are for
-        // the same driver
-        if (c && r->impl != c->impl)
-            return setError(EGL_BAD_MATCH, EGL_FALSE);
         impl_read = r->surface;
     }
 
@@ -682,17 +540,9 @@
     if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
 
     egl_context_t * const c = get_context(ctx);
+    return c->cnx->egl.eglQueryContext(
+            dp->disp.dpy, c->context, attribute, value);
 
-    EGLBoolean result(EGL_TRUE);
-    if (attribute == EGL_CONFIG_ID) {
-        *value = dp->configs[intptr_t(c->config)].configId;
-    } else {
-        // We need to remap EGL_CONFIG_IDs
-        result = c->cnx->egl.eglQueryContext(
-                dp->disp[c->impl].dpy, c->context, attribute, value);
-    }
-
-    return result;
 }
 
 EGLContext eglGetCurrentContext(void)
@@ -744,64 +594,37 @@
 
 EGLBoolean eglWaitGL(void)
 {
-    // could be called before eglInitialize(), but we wouldn't have a context
-    // then, and this function would return GL_TRUE, which isn't wrong.
-
     clearError();
 
-    EGLBoolean res = EGL_TRUE;
-    EGLContext ctx = getContext();
-    if (ctx) {
-        egl_context_t const * const c = get_context(ctx);
-        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        if (uint32_t(c->impl)>=2)
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        egl_connection_t* const cnx = &gEGLImpl[c->impl];
-        if (!cnx->dso) 
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        res = cnx->egl.eglWaitGL();
-    }
-    return res;
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (!cnx->dso)
+        return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+
+    return cnx->egl.eglWaitGL();
 }
 
 EGLBoolean eglWaitNative(EGLint engine)
 {
-    // could be called before eglInitialize(), but we wouldn't have a context
-    // then, and this function would return GL_TRUE, which isn't wrong.
-
     clearError();
 
-    EGLBoolean res = EGL_TRUE;
-    EGLContext ctx = getContext();
-    if (ctx) {
-        egl_context_t const * const c = get_context(ctx);
-        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        if (uint32_t(c->impl)>=2)
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        egl_connection_t* const cnx = &gEGLImpl[c->impl];
-        if (!cnx->dso) 
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        res = cnx->egl.eglWaitNative(engine);
-    }
-    return res;
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (!cnx->dso)
+        return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+
+    return cnx->egl.eglWaitNative(engine);
 }
 
 EGLint eglGetError(void)
 {
-    EGLint result = EGL_SUCCESS;
-    EGLint err;
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        err = EGL_SUCCESS;
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso)
-            err = cnx->egl.eglGetError();
-        if (err!=EGL_SUCCESS && result==EGL_SUCCESS)
-            result = err;
+    EGLint err = EGL_SUCCESS;
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso) {
+        err = cnx->egl.eglGetError();
     }
-    err = egl_tls_t::getError();
-    if (result == EGL_SUCCESS)
-        result = err;
-    return result;
+    if (err == EGL_SUCCESS) {
+        err = egl_tls_t::getError();
+    }
+    return err;
 }
 
 // Note: Similar implementations of these functions also exist in
@@ -885,20 +708,20 @@
 
         if (!addr && (slot < MAX_NUMBER_OF_GL_EXTENSIONS)) {
             bool found = false;
-            for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-                egl_connection_t* const cnx = &gEGLImpl[i];
-                if (cnx->dso && cnx->egl.eglGetProcAddress) {
-                    found = true;
-                    // Extensions are independent of the bound context
-                    cnx->hooks[GLESv1_INDEX]->ext.extensions[slot] =
-                    cnx->hooks[GLESv2_INDEX]->ext.extensions[slot] =
+
+            egl_connection_t* const cnx = &gEGLImpl;
+            if (cnx->dso && cnx->egl.eglGetProcAddress) {
+                found = true;
+                // Extensions are independent of the bound context
+                cnx->hooks[egl_connection_t::GLESv1_INDEX]->ext.extensions[slot] =
+                cnx->hooks[egl_connection_t::GLESv2_INDEX]->ext.extensions[slot] =
 #if EGL_TRACE
-                    debugHooks->ext.extensions[slot] =
-                    gHooksTrace.ext.extensions[slot] =
+                debugHooks->ext.extensions[slot] =
+                gHooksTrace.ext.extensions[slot] =
 #endif
-                            cnx->egl.eglGetProcAddress(procname);
-                }
+                        cnx->egl.eglGetProcAddress(procname);
             }
+
             if (found) {
                 addr = gExtensionForwarders[slot];
 
@@ -937,7 +760,7 @@
 #endif
 
     egl_surface_t const * const s = get_surface(draw);
-    return s->cnx->egl.eglSwapBuffers(dp->disp[s->impl].dpy, s->surface);
+    return s->cnx->egl.eglSwapBuffers(dp->disp.dpy, s->surface);
 }
 
 EGLBoolean eglCopyBuffers(  EGLDisplay dpy, EGLSurface surface,
@@ -953,8 +776,7 @@
         return setError(EGL_BAD_SURFACE, EGL_FALSE);
 
     egl_surface_t const * const s = get_surface(surface);
-    return s->cnx->egl.eglCopyBuffers(
-            dp->disp[s->impl].dpy, s->surface, target);
+    return s->cnx->egl.eglCopyBuffers(dp->disp.dpy, s->surface, target);
 }
 
 const char* eglQueryString(EGLDisplay dpy, EGLint name)
@@ -973,12 +795,8 @@
             return dp->getExtensionString();
         case EGL_CLIENT_APIS:
             return dp->getClientApiString();
-        case EGL_VERSION_HW_ANDROID: {
-            if (gEGLImpl[IMPL_HARDWARE].dso) {
-                return dp->disp[IMPL_HARDWARE].queryString.version;
-            }
-            return dp->disp[IMPL_SOFTWARE].queryString.version;
-        }
+        case EGL_VERSION_HW_ANDROID:
+            return dp->disp.queryString.version;
     }
     return setError(EGL_BAD_PARAMETER, (const char *)0);
 }
@@ -1003,7 +821,7 @@
     egl_surface_t const * const s = get_surface(surface);
     if (s->cnx->egl.eglSurfaceAttrib) {
         return s->cnx->egl.eglSurfaceAttrib(
-                dp->disp[s->impl].dpy, s->surface, attribute, value);
+                dp->disp.dpy, s->surface, attribute, value);
     }
     return setError(EGL_BAD_SURFACE, EGL_FALSE);
 }
@@ -1023,7 +841,7 @@
     egl_surface_t const * const s = get_surface(surface);
     if (s->cnx->egl.eglBindTexImage) {
         return s->cnx->egl.eglBindTexImage(
-                dp->disp[s->impl].dpy, s->surface, buffer);
+                dp->disp.dpy, s->surface, buffer);
     }
     return setError(EGL_BAD_SURFACE, EGL_FALSE);
 }
@@ -1043,7 +861,7 @@
     egl_surface_t const * const s = get_surface(surface);
     if (s->cnx->egl.eglReleaseTexImage) {
         return s->cnx->egl.eglReleaseTexImage(
-                dp->disp[s->impl].dpy, s->surface, buffer);
+                dp->disp.dpy, s->surface, buffer);
     }
     return setError(EGL_BAD_SURFACE, EGL_FALSE);
 }
@@ -1056,17 +874,11 @@
     if (!dp) return EGL_FALSE;
 
     EGLBoolean res = EGL_TRUE;
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso) {
-            if (cnx->egl.eglSwapInterval) {
-                if (cnx->egl.eglSwapInterval(
-                        dp->disp[i].dpy, interval) == EGL_FALSE) {
-                    res = EGL_FALSE;
-                }
-            }
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->egl.eglSwapInterval) {
+        res = cnx->egl.eglSwapInterval(dp->disp.dpy, interval);
     }
+
     return res;
 }
 
@@ -1079,23 +891,15 @@
 {
     clearError();
 
-    // could be called before eglInitialize(), but we wouldn't have a context
-    // then, and this function would return GL_TRUE, which isn't wrong.
-    EGLBoolean res = EGL_TRUE;
-    EGLContext ctx = getContext();
-    if (ctx) {
-        egl_context_t const * const c = get_context(ctx);
-        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        if (uint32_t(c->impl)>=2)
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        egl_connection_t* const cnx = &gEGLImpl[c->impl];
-        if (!cnx->dso) 
-            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
-        if (cnx->egl.eglWaitClient) {
-            res = cnx->egl.eglWaitClient();
-        } else {
-            res = cnx->egl.eglWaitGL();
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (!cnx->dso)
+        return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+
+    EGLBoolean res;
+    if (cnx->egl.eglWaitClient) {
+        res = cnx->egl.eglWaitClient();
+    } else {
+        res = cnx->egl.eglWaitGL();
     }
     return res;
 }
@@ -1110,15 +914,9 @@
 
     // bind this API on all EGLs
     EGLBoolean res = EGL_TRUE;
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso) {
-            if (cnx->egl.eglBindAPI) {
-                if (cnx->egl.eglBindAPI(api) == EGL_FALSE) {
-                    res = EGL_FALSE;
-                }
-            }
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->egl.eglBindAPI) {
+        res = cnx->egl.eglBindAPI(api);
     }
     return res;
 }
@@ -1131,16 +929,11 @@
         return setError(EGL_BAD_PARAMETER, EGL_FALSE);
     }
 
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso) {
-            if (cnx->egl.eglQueryAPI) {
-                // the first one we find is okay, because they all
-                // should be the same
-                return cnx->egl.eglQueryAPI();
-            }
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->egl.eglQueryAPI) {
+        return cnx->egl.eglQueryAPI();
     }
+
     // or, it can only be OpenGL ES
     return EGL_OPENGL_ES_API;
 }
@@ -1152,14 +945,11 @@
     // If there is context bound to the thread, release it
     egl_display_t::loseCurrent(get_context(getContext()));
 
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso) {
-            if (cnx->egl.eglReleaseThread) {
-                cnx->egl.eglReleaseThread();
-            }
-        }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->egl.eglReleaseThread) {
+        cnx->egl.eglReleaseThread();
     }
+
     egl_tls_t::clearTLS();
 #if EGL_TRACE
     if (gEGLDebugLevel > 0)
@@ -1179,9 +969,7 @@
     if (!cnx) return EGL_FALSE;
     if (cnx->egl.eglCreatePbufferFromClientBuffer) {
         return cnx->egl.eglCreatePbufferFromClientBuffer(
-                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
-                buftype, buffer,
-                dp->configs[intptr_t(config)].config, attrib_list);
+                dp->disp.dpy, buftype, buffer, config, attrib_list);
     }
     return setError(EGL_BAD_CONFIG, EGL_NO_SURFACE);
 }
@@ -1205,7 +993,7 @@
     egl_surface_t const * const s = get_surface(surface);
     if (s->cnx->egl.eglLockSurfaceKHR) {
         return s->cnx->egl.eglLockSurfaceKHR(
-                dp->disp[s->impl].dpy, s->surface, attrib_list);
+                dp->disp.dpy, s->surface, attrib_list);
     }
     return setError(EGL_BAD_DISPLAY, EGL_FALSE);
 }
@@ -1223,8 +1011,7 @@
 
     egl_surface_t const * const s = get_surface(surface);
     if (s->cnx->egl.eglUnlockSurfaceKHR) {
-        return s->cnx->egl.eglUnlockSurfaceKHR(
-                dp->disp[s->impl].dpy, s->surface);
+        return s->cnx->egl.eglUnlockSurfaceKHR(dp->disp.dpy, s->surface);
     }
     return setError(EGL_BAD_DISPLAY, EGL_FALSE);
 }
@@ -1244,12 +1031,12 @@
         egl_context_t * const c = get_context(ctx);
         // since we have an EGLContext, we know which implementation to use
         EGLImageKHR image = c->cnx->egl.eglCreateImageKHR(
-                dp->disp[c->impl].dpy, c->context, target, buffer, attrib_list);
+                dp->disp.dpy, c->context, target, buffer, attrib_list);
         if (image == EGL_NO_IMAGE_KHR)
             return image;
             
         egl_image_t* result = new egl_image_t(dpy, ctx);
-        result->images[c->impl] = image;
+        result->image = image;
         return (EGLImageKHR)result;
     } else {
         // EGL_NO_CONTEXT is a valid parameter
@@ -1261,23 +1048,14 @@
 
         EGLint currentError = eglGetError();
 
-        EGLImageKHR implImages[IMPL_NUM_IMPLEMENTATIONS];
-        bool success = false;
-        for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-            egl_connection_t* const cnx = &gEGLImpl[i];
-            implImages[i] = EGL_NO_IMAGE_KHR;
-            if (cnx->dso) {
-                if (cnx->egl.eglCreateImageKHR) {
-                    implImages[i] = cnx->egl.eglCreateImageKHR(
-                            dp->disp[i].dpy, ctx, target, buffer, attrib_list);
-                    if (implImages[i] != EGL_NO_IMAGE_KHR) {
-                        success = true;
-                    }
-                }
-            }
+        EGLImageKHR implImage = EGL_NO_IMAGE_KHR;
+        egl_connection_t* const cnx = &gEGLImpl;
+        if (cnx->dso && cnx->egl.eglCreateImageKHR) {
+            implImage = cnx->egl.eglCreateImageKHR(
+                    dp->disp.dpy, ctx, target, buffer, attrib_list);
         }
 
-        if (!success) {
+        if (implImage == EGL_NO_IMAGE_KHR) {
             // failure, if there was an error when we entered this function,
             // the error flag must not be updated.
             // Otherwise, the error is whatever happened in the implementation
@@ -1289,13 +1067,12 @@
         } else {
             // In case of success, we need to clear all error flags
             // (especially those caused by the implementation that didn't
-            // succeed). TODO: we could avoid this if we knew this was
-            // a "full" success (all implementation succeeded).
+            // succeed).
             eglGetError();
         }
 
         egl_image_t* result = new egl_image_t(dpy, ctx);
-        memcpy(result->images, implImages, sizeof(implImages));
+        result->image = implImage;
         return (EGLImageKHR)result;
     }
 }
@@ -1312,19 +1089,17 @@
 
     egl_image_t* image = get_image(img);
     bool success = false;
-    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (image->images[i] != EGL_NO_IMAGE_KHR) {
-            if (cnx->dso) {
-                if (cnx->egl.eglDestroyImageKHR) {
-                    if (cnx->egl.eglDestroyImageKHR(
-                            dp->disp[i].dpy, image->images[i])) {
-                        success = true;
-                    }
-                }
+
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (image->image != EGL_NO_IMAGE_KHR) {
+        if (cnx->dso && cnx->egl.eglDestroyImageKHR) {
+            if (cnx->egl.eglDestroyImageKHR(
+                    dp->disp.dpy, image->image)) {
+                success = true;
             }
         }
     }
+
     if (!success)
         return EGL_FALSE;
 
@@ -1354,7 +1129,7 @@
     EGLSyncKHR result = EGL_NO_SYNC_KHR;
     if (c->cnx->egl.eglCreateSyncKHR) {
         EGLSyncKHR sync = c->cnx->egl.eglCreateSyncKHR(
-                dp->disp[c->impl].dpy, type, attrib_list);
+                dp->disp.dpy, type, attrib_list);
         if (sync == EGL_NO_SYNC_KHR)
             return sync;
         result = (egl_sync_t*)new egl_sync_t(dpy, ctx, sync);
@@ -1382,7 +1157,7 @@
     egl_context_t * const c = get_context(ctx);
     if (c->cnx->egl.eglDestroySyncKHR) {
         result = c->cnx->egl.eglDestroySyncKHR(
-                dp->disp[c->impl].dpy, syncObject->sync);
+                dp->disp.dpy, syncObject->sync);
         if (result)
             _s.terminate();
     }
@@ -1408,7 +1183,7 @@
     egl_context_t * const c = get_context(ctx);
     if (c->cnx->egl.eglClientWaitSyncKHR) {
         return c->cnx->egl.eglClientWaitSyncKHR(
-                dp->disp[c->impl].dpy, syncObject->sync, flags, timeout);
+                dp->disp.dpy, syncObject->sync, flags, timeout);
     }
 
     return EGL_FALSE;
@@ -1434,7 +1209,7 @@
     egl_context_t * const c = get_context(ctx);
     if (c->cnx->egl.eglGetSyncAttribKHR) {
         return c->cnx->egl.eglGetSyncAttribKHR(
-                dp->disp[c->impl].dpy, syncObject->sync, attribute, value);
+                dp->disp.dpy, syncObject->sync, attribute, value);
     }
 
     return EGL_FALSE;
@@ -1458,12 +1233,10 @@
     }
 
     EGLuint64NV ret = 0;
-    egl_connection_t* const cnx = &gEGLImpl[IMPL_HARDWARE];
+    egl_connection_t* const cnx = &gEGLImpl;
 
-    if (cnx->dso) {
-        if (cnx->egl.eglGetSystemTimeFrequencyNV) {
-            return cnx->egl.eglGetSystemTimeFrequencyNV();
-        }
+    if (cnx->dso && cnx->egl.eglGetSystemTimeFrequencyNV) {
+        return cnx->egl.eglGetSystemTimeFrequencyNV();
     }
 
     return setErrorQuiet(EGL_BAD_DISPLAY, 0);
@@ -1478,12 +1251,10 @@
     }
 
     EGLuint64NV ret = 0;
-    egl_connection_t* const cnx = &gEGLImpl[IMPL_HARDWARE];
+    egl_connection_t* const cnx = &gEGLImpl;
 
-    if (cnx->dso) {
-        if (cnx->egl.eglGetSystemTimeNV) {
-            return cnx->egl.eglGetSystemTimeNV();
-        }
+    if (cnx->dso && cnx->egl.eglGetSystemTimeNV) {
+        return cnx->egl.eglGetSystemTimeNV();
     }
 
     return setErrorQuiet(EGL_BAD_DISPLAY, 0);
diff --git a/opengl/libs/EGL/egl_cache.cpp b/opengl/libs/EGL/egl_cache.cpp
index 7fd6519..c79fb5f 100644
--- a/opengl/libs/EGL/egl_cache.cpp
+++ b/opengl/libs/EGL/egl_cache.cpp
@@ -83,39 +83,39 @@
 
 void egl_cache_t::initialize(egl_display_t *display) {
     Mutex::Autolock lock(mMutex);
-    for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
-            const char* exts = display->disp[i].queryString.extensions;
-            size_t bcExtLen = strlen(BC_EXT_STR);
-            size_t extsLen = strlen(exts);
-            bool equal = !strcmp(BC_EXT_STR, exts);
-            bool atStart = !strncmp(BC_EXT_STR " ", exts, bcExtLen+1);
-            bool atEnd = (bcExtLen+1) < extsLen &&
-                    !strcmp(" " BC_EXT_STR, exts + extsLen - (bcExtLen+1));
-            bool inMiddle = strstr(exts, " " BC_EXT_STR " ");
-            if (equal || atStart || atEnd || inMiddle) {
-                PFNEGLSETBLOBCACHEFUNCSANDROIDPROC eglSetBlobCacheFuncsANDROID;
-                eglSetBlobCacheFuncsANDROID =
-                        reinterpret_cast<PFNEGLSETBLOBCACHEFUNCSANDROIDPROC>(
+
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
+        const char* exts = display->disp.queryString.extensions;
+        size_t bcExtLen = strlen(BC_EXT_STR);
+        size_t extsLen = strlen(exts);
+        bool equal = !strcmp(BC_EXT_STR, exts);
+        bool atStart = !strncmp(BC_EXT_STR " ", exts, bcExtLen+1);
+        bool atEnd = (bcExtLen+1) < extsLen &&
+                !strcmp(" " BC_EXT_STR, exts + extsLen - (bcExtLen+1));
+        bool inMiddle = strstr(exts, " " BC_EXT_STR " ");
+        if (equal || atStart || atEnd || inMiddle) {
+            PFNEGLSETBLOBCACHEFUNCSANDROIDPROC eglSetBlobCacheFuncsANDROID;
+            eglSetBlobCacheFuncsANDROID =
+                    reinterpret_cast<PFNEGLSETBLOBCACHEFUNCSANDROIDPROC>(
                             cnx->egl.eglGetProcAddress(
                                     "eglSetBlobCacheFuncsANDROID"));
-                if (eglSetBlobCacheFuncsANDROID == NULL) {
-                    ALOGE("EGL_ANDROID_blob_cache advertised by display %d, "
-                            "but unable to get eglSetBlobCacheFuncsANDROID", i);
-                    continue;
-                }
+            if (eglSetBlobCacheFuncsANDROID == NULL) {
+                ALOGE("EGL_ANDROID_blob_cache advertised, "
+                        "but unable to get eglSetBlobCacheFuncsANDROID");
+                return;
+            }
 
-                eglSetBlobCacheFuncsANDROID(display->disp[i].dpy,
-                        android::setBlob, android::getBlob);
-                EGLint err = cnx->egl.eglGetError();
-                if (err != EGL_SUCCESS) {
-                    ALOGE("eglSetBlobCacheFuncsANDROID resulted in an error: "
-                            "%#x", err);
-                }
+            eglSetBlobCacheFuncsANDROID(display->disp.dpy,
+                    android::setBlob, android::getBlob);
+            EGLint err = cnx->egl.eglGetError();
+            if (err != EGL_SUCCESS) {
+                ALOGE("eglSetBlobCacheFuncsANDROID resulted in an error: "
+                        "%#x", err);
             }
         }
     }
+
     mInitialized = true;
 }
 
diff --git a/opengl/libs/EGL/egl_display.cpp b/opengl/libs/EGL/egl_display.cpp
index 6b2ae51..c85b4ce 100644
--- a/opengl/libs/EGL/egl_display.cpp
+++ b/opengl/libs/EGL/egl_display.cpp
@@ -60,18 +60,12 @@
 extern void initEglTraceLevel();
 extern void setGLHooksThreadSpecific(gl_hooks_t const *value);
 
-static int cmp_configs(const void* a, const void *b) {
-    const egl_config_t& c0 = *(egl_config_t const *)a;
-    const egl_config_t& c1 = *(egl_config_t const *)b;
-    return c0<c1 ? -1 : (c1<c0 ? 1 : 0);
-}
-
 // ----------------------------------------------------------------------------
 
 egl_display_t egl_display_t::sDisplay[NUM_DISPLAYS];
 
 egl_display_t::egl_display_t() :
-    magic('_dpy'), numTotalConfigs(0), configs(0), refs(0) {
+    magic('_dpy'), refs(0) {
 }
 
 egl_display_t::~egl_display_t() {
@@ -119,15 +113,13 @@
     // get our driver loader
     Loader& loader(Loader::getInstance());
 
-    for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso && disp[i].dpy == EGL_NO_DISPLAY) {
-            EGLDisplay dpy = cnx->egl.eglGetDisplay(display);
-            disp[i].dpy = dpy;
-            if (dpy == EGL_NO_DISPLAY) {
-                loader.close(cnx->dso);
-                cnx->dso = NULL;
-            }
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && disp.dpy == EGL_NO_DISPLAY) {
+        EGLDisplay dpy = cnx->egl.eglGetDisplay(display);
+        disp.dpy = dpy;
+        if (dpy == EGL_NO_DISPLAY) {
+            loader.close(cnx->dso);
+            cnx->dso = NULL;
         }
     }
 
@@ -160,12 +152,11 @@
     // initialize each EGL and
     // build our own extension string first, based on the extension we know
     // and the extension supported by our client implementation
-    for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        cnx->major = -1;
-        cnx->minor = -1;
-        if (!cnx->dso)
-            continue;
+
+    egl_connection_t* const cnx = &gEGLImpl;
+    cnx->major = -1;
+    cnx->minor = -1;
+    if (cnx->dso) {
 
 #if defined(ADRENO130)
 #warning "Adreno-130 eglInitialize() workaround"
@@ -177,31 +168,30 @@
          * eglGetDisplay() before calling eglInitialize();
          */
         if (i == IMPL_HARDWARE) {
-            disp[i].dpy =
-            cnx->egl.eglGetDisplay(EGL_DEFAULT_DISPLAY);
+            disp[i].dpy = cnx->egl.eglGetDisplay(EGL_DEFAULT_DISPLAY);
         }
 #endif
 
-        EGLDisplay idpy = disp[i].dpy;
+        EGLDisplay idpy = disp.dpy;
         if (cnx->egl.eglInitialize(idpy, &cnx->major, &cnx->minor)) {
-            //ALOGD("initialized %d dpy=%p, ver=%d.%d, cnx=%p",
-            //        i, idpy, cnx->major, cnx->minor, cnx);
+            //ALOGD("initialized dpy=%p, ver=%d.%d, cnx=%p",
+            //        idpy, cnx->major, cnx->minor, cnx);
 
             // display is now initialized
-            disp[i].state = egl_display_t::INITIALIZED;
+            disp.state = egl_display_t::INITIALIZED;
 
             // get the query-strings for this display for each implementation
-            disp[i].queryString.vendor = cnx->egl.eglQueryString(idpy,
+            disp.queryString.vendor = cnx->egl.eglQueryString(idpy,
                     EGL_VENDOR);
-            disp[i].queryString.version = cnx->egl.eglQueryString(idpy,
+            disp.queryString.version = cnx->egl.eglQueryString(idpy,
                     EGL_VERSION);
-            disp[i].queryString.extensions = cnx->egl.eglQueryString(idpy,
+            disp.queryString.extensions = cnx->egl.eglQueryString(idpy,
                     EGL_EXTENSIONS);
-            disp[i].queryString.clientApi = cnx->egl.eglQueryString(idpy,
+            disp.queryString.clientApi = cnx->egl.eglQueryString(idpy,
                     EGL_CLIENT_APIS);
 
         } else {
-            ALOGW("%d: eglInitialize(%p) failed (%s)", i, idpy,
+            ALOGW("eglInitialize(%p) failed (%s)", idpy,
                     egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
         }
     }
@@ -211,7 +201,7 @@
     mVersionString.setTo(sVersionString);
     mClientApiString.setTo(sClientApiString);
 
-    // we only add extensions that exist in at least one implementation
+    // we only add extensions that exist in the implementation
     char const* start = sExtensionString;
     char const* end;
     do {
@@ -223,15 +213,13 @@
             if (len) {
                 // NOTE: we could avoid the copy if we had strnstr.
                 const String8 ext(start, len);
-                // now go through all implementations and look for this extension
-                for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-                    if (disp[i].queryString.extensions) {
-                        // if we find it, add this extension string to our list
-                        // (and don't forget the space)
-                        const char* match = strstr(disp[i].queryString.extensions, ext.string());
-                        if (match && (match[len] == ' ' || match[len] == 0)) {
-                            mExtensionString.append(start, len+1);
-                        }
+                // now look for this extension
+                if (disp.queryString.extensions) {
+                    // if we find it, add this extension string to our list
+                    // (and don't forget the space)
+                    const char* match = strstr(disp.queryString.extensions, ext.string());
+                    if (match && (match[len] == ' ' || match[len] == 0)) {
+                        mExtensionString.append(start, len+1);
                     }
                 }
             }
@@ -242,52 +230,12 @@
 
     egl_cache_t::get()->initialize(this);
 
-    EGLBoolean res = EGL_FALSE;
-    for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
-            EGLint n;
-            if (cnx->egl.eglGetConfigs(disp[i].dpy, 0, 0, &n)) {
-                disp[i].config = (EGLConfig*) malloc(sizeof(EGLConfig) * n);
-                if (disp[i].config) {
-                    if (cnx->egl.eglGetConfigs(disp[i].dpy, disp[i].config, n,
-                            &disp[i].numConfigs)) {
-                        numTotalConfigs += n;
-                        res = EGL_TRUE;
-                    }
-                }
-            }
-        }
-    }
-
-    if (res == EGL_TRUE) {
-        configs = new egl_config_t[numTotalConfigs];
-        for (int i = 0, k = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-            egl_connection_t* const cnx = &gEGLImpl[i];
-            if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
-                for (int j = 0; j < disp[i].numConfigs; j++) {
-                    configs[k].impl = i;
-                    configs[k].config = disp[i].config[j];
-                    configs[k].configId = k + 1; // CONFIG_ID start at 1
-                    // store the implementation's CONFIG_ID
-                    cnx->egl.eglGetConfigAttrib(disp[i].dpy, disp[i].config[j],
-                            EGL_CONFIG_ID, &configs[k].implConfigId);
-                    k++;
-                }
-            }
-        }
-
-        // sort our configurations so we can do binary-searches
-        qsort(configs, numTotalConfigs, sizeof(egl_config_t), cmp_configs);
-
-        refs++;
-        if (major != NULL)
-            *major = VERSION_MAJOR;
-        if (minor != NULL)
-            *minor = VERSION_MINOR;
-        return EGL_TRUE;
-    }
-    return setError(EGL_NOT_INITIALIZED, EGL_FALSE);
+    refs++;
+    if (major != NULL)
+        *major = VERSION_MAJOR;
+    if (minor != NULL)
+        *minor = VERSION_MINOR;
+    return EGL_TRUE;
 }
 
 EGLBoolean egl_display_t::terminate() {
@@ -305,22 +253,15 @@
     }
 
     EGLBoolean res = EGL_FALSE;
-    for (int i = 0; i < IMPL_NUM_IMPLEMENTATIONS; i++) {
-        egl_connection_t* const cnx = &gEGLImpl[i];
-        if (cnx->dso && disp[i].state == egl_display_t::INITIALIZED) {
-            if (cnx->egl.eglTerminate(disp[i].dpy) == EGL_FALSE) {
-                ALOGW("%d: eglTerminate(%p) failed (%s)", i, disp[i].dpy,
-                        egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
-            }
-            // REVISIT: it's unclear what to do if eglTerminate() fails
-            free(disp[i].config);
-
-            disp[i].numConfigs = 0;
-            disp[i].config = 0;
-            disp[i].state = egl_display_t::TERMINATED;
-
-            res = EGL_TRUE;
+    egl_connection_t* const cnx = &gEGLImpl;
+    if (cnx->dso && disp.state == egl_display_t::INITIALIZED) {
+        if (cnx->egl.eglTerminate(disp.dpy) == EGL_FALSE) {
+            ALOGW("eglTerminate(%p) failed (%s)", disp.dpy,
+                    egl_tls_t::egl_strerror(cnx->egl.eglGetError()));
         }
+        // REVISIT: it's unclear what to do if eglTerminate() fails
+        disp.state = egl_display_t::TERMINATED;
+        res = EGL_TRUE;
     }
 
     // Mark all objects remaining in the list as terminated, unless
@@ -337,8 +278,6 @@
     objects.clear();
 
     refs--;
-    numTotalConfigs = 0;
-    delete[] configs;
     return res;
 }
 
@@ -390,13 +329,13 @@
         Mutex::Autolock _l(lock);
         if (c) {
             result = c->cnx->egl.eglMakeCurrent(
-                    disp[c->impl].dpy, impl_draw, impl_read, impl_ctx);
+                    disp.dpy, impl_draw, impl_read, impl_ctx);
             if (result == EGL_TRUE) {
                 c->onMakeCurrent(draw, read);
             }
         } else {
             result = cur_c->cnx->egl.eglMakeCurrent(
-                    disp[cur_c->impl].dpy, impl_draw, impl_read, impl_ctx);
+                    disp.dpy, impl_draw, impl_read, impl_ctx);
             if (result == EGL_TRUE) {
                 cur_c->onLooseCurrent();
             }
diff --git a/opengl/libs/EGL/egl_display.h b/opengl/libs/EGL/egl_display.h
index f3c4ddf..6348228 100644
--- a/opengl/libs/EGL/egl_display.h
+++ b/opengl/libs/EGL/egl_display.h
@@ -44,23 +44,6 @@
 
 // ----------------------------------------------------------------------------
 
-struct egl_config_t {
-    egl_config_t() {}
-    egl_config_t(int impl, EGLConfig config)
-        : impl(impl), config(config), configId(0), implConfigId(0) { }
-    int         impl;           // the implementation this config is for
-    EGLConfig   config;         // the implementation's EGLConfig
-    EGLint      configId;       // our CONFIG_ID
-    EGLint      implConfigId;   // the implementation's CONFIG_ID
-    inline bool operator < (const egl_config_t& rhs) const {
-        if (impl < rhs.impl) return true;
-        if (impl > rhs.impl) return false;
-        return config < rhs.config;
-    }
-};
-
-// ----------------------------------------------------------------------------
-
 class EGLAPI egl_display_t { // marked as EGLAPI for testing purposes
     static egl_display_t sDisplay[NUM_DISPLAYS];
     EGLDisplay getDisplay(EGLNativeDisplayType display);
@@ -113,12 +96,9 @@
     };
 
     struct DisplayImpl {
-        DisplayImpl() : dpy(EGL_NO_DISPLAY), config(0),
-                        state(NOT_INITIALIZED), numConfigs(0) { }
+        DisplayImpl() : dpy(EGL_NO_DISPLAY), state(NOT_INITIALIZED) { }
         EGLDisplay  dpy;
-        EGLConfig*  config;
         EGLint      state;
-        EGLint      numConfigs;
         strings_t   queryString;
     };
 
@@ -126,9 +106,7 @@
     uint32_t        magic;
 
 public:
-    DisplayImpl     disp[IMPL_NUM_IMPLEMENTATIONS];
-    EGLint          numTotalConfigs;
-    egl_config_t*   configs;
+    DisplayImpl     disp;
 
 private:
             uint32_t                    refs;
diff --git a/opengl/libs/EGL/egl_object.cpp b/opengl/libs/EGL/egl_object.cpp
index b660c53..d0cbb31 100644
--- a/opengl/libs/EGL/egl_object.cpp
+++ b/opengl/libs/EGL/egl_object.cpp
@@ -64,9 +64,9 @@
 // ----------------------------------------------------------------------------
 
 egl_context_t::egl_context_t(EGLDisplay dpy, EGLContext context, EGLConfig config,
-        int impl, egl_connection_t const* cnx, int version) :
+        egl_connection_t const* cnx, int version) :
     egl_object_t(get_display(dpy)), dpy(dpy), context(context),
-            config(config), read(0), draw(0), impl(impl), cnx(cnx),
+            config(config), read(0), draw(0), cnx(cnx),
             version(version)
 {
 }
@@ -87,7 +87,7 @@
 
     if (gl_extensions.isEmpty()) {
         // call the implementation's glGetString(GL_EXTENSIONS)
-        const char* exts = (const char *)gEGLImpl[impl].hooks[version]->gl.glGetString(GL_EXTENSIONS);
+        const char* exts = (const char *)gEGLImpl.hooks[version]->gl.glGetString(GL_EXTENSIONS);
         gl_extensions.setTo(exts);
         if (gl_extensions.find("GL_EXT_debug_marker") < 0) {
             String8 temp("GL_EXT_debug_marker ");
diff --git a/opengl/libs/EGL/egl_object.h b/opengl/libs/EGL/egl_object.h
index abd4cbb..f137bad 100644
--- a/opengl/libs/EGL/egl_object.h
+++ b/opengl/libs/EGL/egl_object.h
@@ -125,7 +125,7 @@
 
 // ----------------------------------------------------------------------------
 
-class egl_surface_t: public egl_object_t {
+class egl_surface_t : public egl_object_t {
 protected:
     ~egl_surface_t() {
         ANativeWindow* const window = win.get();
@@ -140,15 +140,14 @@
     typedef egl_object_t::LocalRef<egl_surface_t, EGLSurface> Ref;
 
     egl_surface_t(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win,
-            EGLSurface surface, int impl, egl_connection_t const* cnx) :
+            EGLSurface surface, egl_connection_t const* cnx) :
         egl_object_t(get_display(dpy)), dpy(dpy), surface(surface),
-                config(config), win(win), impl(impl), cnx(cnx) {
+                config(config), win(win), cnx(cnx) {
     }
     EGLDisplay dpy;
     EGLSurface surface;
     EGLConfig config;
     sp<ANativeWindow> win;
-    int impl;
     egl_connection_t const* cnx;
 };
 
@@ -159,7 +158,7 @@
     typedef egl_object_t::LocalRef<egl_context_t, EGLContext> Ref;
 
     egl_context_t(EGLDisplay dpy, EGLContext context, EGLConfig config,
-            int impl, egl_connection_t const* cnx, int version);
+            egl_connection_t const* cnx, int version);
 
     void onLooseCurrent();
     void onMakeCurrent(EGLSurface draw, EGLSurface read);
@@ -169,7 +168,6 @@
     EGLConfig config;
     EGLSurface read;
     EGLSurface draw;
-    int impl;
     egl_connection_t const* cnx;
     int version;
     String8 gl_extensions;
@@ -182,12 +180,11 @@
     typedef egl_object_t::LocalRef<egl_image_t, EGLImageKHR> Ref;
 
     egl_image_t(EGLDisplay dpy, EGLContext context) :
-        egl_object_t(get_display(dpy)), dpy(dpy), context(context) {
-        memset(images, 0, sizeof(images));
-    }
+        egl_object_t(get_display(dpy)),
+        dpy(dpy), context(context), image(EGL_NO_IMAGE_KHR) { }
     EGLDisplay dpy;
     EGLContext context;
-    EGLImageKHR images[IMPL_NUM_IMPLEMENTATIONS];
+    EGLImageKHR image;
 };
 
 class egl_sync_t: public egl_object_t {
diff --git a/opengl/libs/EGL/egldefs.h b/opengl/libs/EGL/egldefs.h
index ff20957..c900c1c 100644
--- a/opengl/libs/EGL/egldefs.h
+++ b/opengl/libs/EGL/egldefs.h
@@ -19,31 +19,24 @@
 
 #include "hooks.h"
 
+#define VERSION_MAJOR 1
+#define VERSION_MINOR 4
+
 // ----------------------------------------------------------------------------
 namespace android {
 // ----------------------------------------------------------------------------
 
-#define VERSION_MAJOR 1
-#define VERSION_MINOR 4
-
 //  EGLDisplay are global, not attached to a given thread
 const unsigned int NUM_DISPLAYS = 1;
 
-enum {
-    IMPL_HARDWARE = 0,
-    IMPL_SOFTWARE,
-    IMPL_NUM_IMPLEMENTATIONS
-};
-
-enum {
-    GLESv1_INDEX = 0,
-    GLESv2_INDEX = 1,
-};
-
 // ----------------------------------------------------------------------------
 
-struct egl_connection_t
-{
+struct egl_connection_t {
+    enum {
+        GLESv1_INDEX = 0,
+        GLESv2_INDEX = 1
+    };
+
     inline egl_connection_t() : dso(0) { }
     void *              dso;
     gl_hooks_t *        hooks[2];
@@ -54,7 +47,7 @@
 
 // ----------------------------------------------------------------------------
 
-extern gl_hooks_t gHooks[2][IMPL_NUM_IMPLEMENTATIONS];
+extern gl_hooks_t gHooks[2];
 extern gl_hooks_t gHooksNoContext;
 extern pthread_key_t gGLWrapperKey;
 extern "C" void gl_unimplemented();
@@ -63,7 +56,7 @@
 extern char const * const gl_names[];
 extern char const * const egl_names[];
 
-extern egl_connection_t gEGLImpl[IMPL_NUM_IMPLEMENTATIONS];
+extern egl_connection_t gEGLImpl;
 
 // ----------------------------------------------------------------------------
 }; // namespace android