Merge change 25463 into eclair

* changes:
  First pass at pattern lock screen that includes date / time and carrier info (framework portion).
diff --git a/cmds/keystore/netkeystore.c b/cmds/keystore/netkeystore.c
index 83c7871..87fdc80 100644
--- a/cmds/keystore/netkeystore.c
+++ b/cmds/keystore/netkeystore.c
@@ -116,10 +116,13 @@
 
 static int is_alnum_string(char *s)
 {
+    char *s0 = s;
     while (*s != 0) {
-        if (!isalnum(*s++)) return 0;
+        if (!isalnum(*s++)) {
+            LOGE("The string '%s' is not an alphanumeric string\n", s0);
+            return 0;
+        }
     }
-    LOGE("The string %s is not an alphanumeric string\n", s);
     return 1;
 }
 
@@ -159,7 +162,9 @@
 // no argument
 static void do_get_state(LPC_MARSHAL *cmd, LPC_MARSHAL *reply)
 {
-    reply->retcode = get_state();
+    int s = get_state();
+    if (DBG) LOGD("keystore state = %d\n", s);
+    reply->retcode = s;
 }
 
 // args of listkeys():
@@ -413,12 +418,10 @@
 
         // read the command, execute and send the result back.
         if(read_marshal(s, &cmd)) goto err;
-        if (DBG) LOGD("new connection\n");
         execute(&cmd, &reply);
         write_marshal(s, &reply);
 err:
         memset(&reply, 0, sizeof(LPC_MARSHAL));
-        if (DBG) LOGD("closing connection\n");
         close(s);
     }
 
diff --git a/include/private/ui/SharedBufferStack.h b/include/private/ui/SharedBufferStack.h
index 8b0f154..c02b2e7 100644
--- a/include/private/ui/SharedBufferStack.h
+++ b/include/private/ui/SharedBufferStack.h
@@ -69,12 +69,6 @@
 
 // ----------------------------------------------------------------------------
 
-struct FlatRegion { // 12 bytes
-    static const unsigned int NUM_RECT_MAX = 1;
-    uint32_t    count;
-    uint16_t    rects[4*NUM_RECT_MAX];
-};
-
 // should be 128 bytes (32 longs)
 class SharedBufferStack
 {
@@ -84,6 +78,18 @@
     friend class SharedBufferServer;
 
 public:
+    struct FlatRegion { // 12 bytes
+        static const unsigned int NUM_RECT_MAX = 1;
+        uint32_t    count;
+        uint16_t    rects[4*NUM_RECT_MAX];
+    };
+    
+    struct Statistics { // 4 longs
+        typedef int32_t usecs_t;
+        usecs_t  totalTime;
+        usecs_t  reserved[3];
+    };
+    
     SharedBufferStack();
     void init(int32_t identity);
     status_t setDirtyRegion(int buffer, const Region& reg);
@@ -100,7 +106,8 @@
     volatile int32_t reallocMask;
 
     int32_t     identity;       // surface's identity (const)
-    int32_t     reserved32[13];
+    int32_t     reserved32[9];
+    Statistics  stats;
     FlatRegion  dirtyRegion[NUM_BUFFER_MAX];    // 12*4=48 bytes
 };
 
@@ -223,7 +230,7 @@
     status_t queue(int buf);
     bool needNewBuffer(int buffer) const;
     status_t setDirtyRegion(int buffer, const Region& reg);
-
+    
 private:
     friend struct Condition;
     friend struct DequeueCondition;
@@ -257,6 +264,8 @@
     };
 
     int32_t tail;
+    // statistics...
+    nsecs_t mDequeueTime[NUM_BUFFER_MAX];
 };
 
 // ----------------------------------------------------------------------------
@@ -275,6 +284,9 @@
     
     Region getDirtyRegion(int buffer) const;
 
+    SharedBufferStack::Statistics getStats() const;
+    
+
 private:
     struct UnlockUpdate : public UpdateBase {
         const int lockedBuffer;
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index d893f0a..cc913cb 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -174,6 +174,13 @@
 
     surface = eglCreateWindowSurface(display, config, mNativeWindow.get(), NULL);
 
+    if (mFlags & UPDATE_ON_DEMAND) {
+        // if we have update on demand, we definitely don't need to
+        // preserve the backbuffer, which is usually costly.
+        eglSurfaceAttrib(display, surface,
+                EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
+    }
+
     if (eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &dummy) == EGL_TRUE) {
         if (dummy == EGL_BUFFER_PRESERVED) {
             mFlags |= BUFFER_PRESERVED;
diff --git a/libs/surfaceflinger/Layer.cpp b/libs/surfaceflinger/Layer.cpp
index 1e7f1e6..7387c85 100644
--- a/libs/surfaceflinger/Layer.cpp
+++ b/libs/surfaceflinger/Layer.cpp
@@ -303,7 +303,6 @@
 
     // Index of the back buffer
     const bool backbufferChanged = (front.w != temp.w) || (front.h != temp.h);
-
     if (backbufferChanged) {
         // the size changed, we need to ask our client to request a new buffer
         LOGD_IF(DEBUG_RESIZE,
@@ -318,17 +317,6 @@
         // buffer, it'll get the new size.
         setDrawingSize(temp.w, temp.h);
 
-        // all buffers need reallocation
-        lcblk->reallocate();
-
-        // recompute the visible region
-        // FIXME: ideally we would do that only when we have received
-        // a buffer of the right size
-        flags |= Layer::eVisibleRegion;
-        this->contentDirty = true;
-        
-#if 0 
-        // FIXME: handle freeze lock
         // we're being resized and there is a freeze display request,
         // acquire a freeze lock, so that the screen stays put
         // until we've redrawn at the new size; this is to avoid
@@ -340,7 +328,12 @@
                 mFreezeLock = mFlinger->getFreezeLock();
             }
         }
-#endif
+
+        // recompute the visible region
+        flags |= Layer::eVisibleRegion;
+        this->contentDirty = true;
+        // all buffers need reallocation
+        lcblk->reallocate();
     }
 
     if (temp.sequence != front.sequence) {
@@ -382,6 +375,13 @@
     const Region dirty(lcblk->getDirtyRegion(buf));
     mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() );
 
+
+    const Layer::State& front(drawingState());
+    if (newFrontBuffer->getWidth() == front.w &&
+        newFrontBuffer->getHeight() ==front.h) {
+        mFreezeLock.clear();
+    }
+
     // FIXME: signal an event if we have more buffers waiting
     // mFlinger->signalEvent();
 
diff --git a/libs/surfaceflinger/LayerBuffer.cpp b/libs/surfaceflinger/LayerBuffer.cpp
index 38a897d..667571b 100644
--- a/libs/surfaceflinger/LayerBuffer.cpp
+++ b/libs/surfaceflinger/LayerBuffer.cpp
@@ -595,6 +595,7 @@
 
     *overlayRef = new OverlayRef(mOverlayHandle, channel,
             mWidth, mHeight, mFormat, mWidthStride, mHeightStride);
+    mLayer.mFlinger->signalEvent();
 }
 
 LayerBuffer::OverlaySource::~OverlaySource()
diff --git a/libs/surfaceflinger/SurfaceFlinger.cpp b/libs/surfaceflinger/SurfaceFlinger.cpp
index a352431..31b5128 100644
--- a/libs/surfaceflinger/SurfaceFlinger.cpp
+++ b/libs/surfaceflinger/SurfaceFlinger.cpp
@@ -1521,6 +1521,7 @@
             /*** Layer ***/
             sp<Layer> l = LayerBase::dynamicCast< Layer* >(layer.get());
             if (l != 0) {
+                SharedBufferStack::Statistics stats = l->lcblk->getStats();
                 result.append( l->lcblk->dump("      ") );
                 sp<const Buffer> buf0(l->getBuffer(0));
                 sp<const Buffer> buf1(l->getBuffer(1));
@@ -1539,10 +1540,10 @@
                 snprintf(buffer, SIZE,
                         "      "
                         "format=%2d, [%3ux%3u:%3u] [%3ux%3u:%3u],"
-                        " freezeLock=%p\n",
+                        " freezeLock=%p, dq-q-time=%u us\n",
                         l->pixelFormat(),
                         w0, h0, s0, w1, h1, s1,
-                        l->getFreezeLock().get());
+                        l->getFreezeLock().get(), stats.totalTime);
                 result.append(buffer);
                 buffer[0] = 0;
             }
diff --git a/libs/ui/SharedBufferStack.cpp b/libs/ui/SharedBufferStack.cpp
index 7789a3f..9ad4349 100644
--- a/libs/ui/SharedBufferStack.cpp
+++ b/libs/ui/SharedBufferStack.cpp
@@ -276,6 +276,8 @@
         LOGW("dequeue: tail=%d, head=%d, avail=%d, queued=%d",
                 tail, stack.head, stack.available, stack.queued);
     }
+        
+    const nsecs_t dequeueTime = systemTime(SYSTEM_TIME_THREAD);
 
     //LOGD("[%d] about to dequeue a buffer",
     //        mSharedStack->identity);
@@ -296,6 +298,8 @@
     LOGD_IF(DEBUG_ATOMICS, "dequeued=%d, tail=%d, %s",
             dequeued, tail, dump("").string());
 
+    mDequeueTime[dequeued] = dequeueTime; 
+
     return dequeued;
 }
 
@@ -312,7 +316,7 @@
 status_t SharedBufferClient::lock(int buf)
 {
     LockCondition condition(this, buf);
-    status_t err = waitForCondition(condition);    
+    status_t err = waitForCondition(condition);
     return err;
 }
 
@@ -321,6 +325,9 @@
     QueueUpdate update(this);
     status_t err = updateCondition( update );
     LOGD_IF(DEBUG_ATOMICS, "queued=%d, %s", buf, dump("").string());
+    SharedBufferStack& stack( *mSharedStack );
+    const nsecs_t now = systemTime(SYSTEM_TIME_THREAD);
+    stack.stats.totalTime = ns2us(now - mDequeueTime[buf]);
     return err;
 }
 
@@ -393,5 +400,12 @@
     return stack.getDirtyRegion(buffer);
 }
 
+SharedBufferStack::Statistics SharedBufferServer::getStats() const
+{
+    SharedBufferStack& stack( *mSharedStack );
+    return stack.stats;
+}
+
+
 // ---------------------------------------------------------------------------
 }; // namespace android