Divide huge SensorService files into managable pieces
Splitted SensorService.cpp and SensorService.h into smaller more
manageable pieces with the embedded classes/structs now in individual
files.
Change-Id: I5e75c41b9e0e5c9aff102fe4b0f142c61d1203e2
diff --git a/services/sensorservice/SensorEventConnection.h b/services/sensorservice/SensorEventConnection.h
new file mode 100644
index 0000000..b796cc0
--- /dev/null
+++ b/services/sensorservice/SensorEventConnection.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SENSOR_EVENT_CONNECTION_H
+#define ANDROID_SENSOR_EVENT_CONNECTION_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Vector.h>
+#include <utils/SortedVector.h>
+#include <utils/KeyedVector.h>
+#include <utils/threads.h>
+#include <utils/AndroidThreads.h>
+#include <utils/RefBase.h>
+#include <utils/Looper.h>
+#include <utils/String8.h>
+
+#include <binder/BinderService.h>
+
+#include <gui/Sensor.h>
+#include <gui/BitTube.h>
+#include <gui/ISensorServer.h>
+#include <gui/ISensorEventConnection.h>
+
+#include "SensorService.h"
+
+namespace android {
+
+class SensorService;
+
+class SensorService::SensorEventConnection:
+ public BnSensorEventConnection, public LooperCallback {
+
+ friend class SensorService;
+
+public:
+ SensorEventConnection(const sp<SensorService>& service, uid_t uid, String8 packageName,
+ bool isDataInjectionMode, const String16& opPackageName);
+
+ status_t sendEvents(sensors_event_t const* buffer, size_t count, sensors_event_t* scratch,
+ SensorEventConnection const * const * mapFlushEventsToConnections = NULL);
+ bool hasSensor(int32_t handle) const;
+ bool hasAnySensor() const;
+ bool hasOneShotSensors() const;
+ bool addSensor(int32_t handle);
+ bool removeSensor(int32_t handle);
+ void setFirstFlushPending(int32_t handle, bool value);
+ void dump(String8& result);
+ bool needsWakeLock();
+ void resetWakeLockRefCount();
+ String8 getPackageName() const;
+
+ uid_t getUid() const { return mUid; }
+
+private:
+ virtual ~SensorEventConnection();
+ virtual void onFirstRef();
+ virtual sp<BitTube> getSensorChannel() const;
+ virtual status_t enableDisable(int handle, bool enabled, nsecs_t samplingPeriodNs,
+ nsecs_t maxBatchReportLatencyNs, int reservedFlags);
+ virtual status_t setEventRate(int handle, nsecs_t samplingPeriodNs);
+ virtual status_t flush();
+ // Count the number of flush complete events which are about to be dropped in the buffer.
+ // Increment mPendingFlushEventsToSend in mSensorInfo. These flush complete events will be sent
+ // separately before the next batch of events.
+ void countFlushCompleteEventsLocked(sensors_event_t const* scratch, int numEventsDropped);
+
+ // Check if there are any wake up events in the buffer. If yes, return the index of the first
+ // wake_up sensor event in the buffer else return -1. This wake_up sensor event will have the
+ // flag WAKE_UP_SENSOR_EVENT_NEEDS_ACK set. Exactly one event per packet will have the wake_up
+ // flag set. SOCK_SEQPACKET ensures that either the entire packet is read or dropped.
+ int findWakeUpSensorEventLocked(sensors_event_t const* scratch, int count);
+
+ // Send pending flush_complete events. There may have been flush_complete_events that are
+ // dropped which need to be sent separately before other events. On older HALs (1_0) this method
+ // emulates the behavior of flush().
+ void sendPendingFlushEventsLocked();
+
+ // Writes events from mEventCache to the socket.
+ void writeToSocketFromCache();
+
+ // Compute the approximate cache size from the FIFO sizes of various sensors registered for this
+ // connection. Wake up and non-wake up sensors have separate FIFOs but FIFO may be shared
+ // amongst wake-up sensors and non-wake up sensors.
+ int computeMaxCacheSizeLocked() const;
+
+ // When more sensors register, the maximum cache size desired may change. Compute max cache
+ // size, reallocate memory and copy over events from the older cache.
+ void reAllocateCacheLocked(sensors_event_t const* scratch, int count);
+
+ // LooperCallback method. If there is data to read on this fd, it is an ack from the app that it
+ // has read events from a wake up sensor, decrement mWakeLockRefCount. If this fd is available
+ // for writing send the data from the cache.
+ virtual int handleEvent(int fd, int events, void* data);
+
+ // Increment mPendingFlushEventsToSend for the given sensor handle.
+ void incrementPendingFlushCount(int32_t handle);
+
+ // Add or remove the file descriptor associated with the BitTube to the looper. If mDead is set
+ // to true or there are no more sensors for this connection, the file descriptor is removed if
+ // it has been previously added to the Looper. Depending on the state of the connection FD may
+ // be added to the Looper. The flags to set are determined by the internal state of the
+ // connection. FDs are added to the looper when wake-up sensors are registered (to poll for
+ // acknowledgements) and when write fails on the socket when there are too many error and the
+ // other end hangs up or when this client unregisters for this connection.
+ void updateLooperRegistration(const sp<Looper>& looper); void
+ updateLooperRegistrationLocked(const sp<Looper>& looper);
+
+ sp<SensorService> const mService;
+ sp<BitTube> mChannel;
+ uid_t mUid;
+ mutable Mutex mConnectionLock;
+ // Number of events from wake up sensors which are still pending and haven't been delivered to
+ // the corresponding application. It is incremented by one unit for each write to the socket.
+ uint32_t mWakeLockRefCount;
+
+ // If this flag is set to true, it means that the file descriptor associated with the BitTube
+ // has been added to the Looper in SensorService. This flag is typically set when this
+ // connection has wake-up sensors associated with it or when write has failed on this connection
+ // and we're storing some events in the cache.
+ bool mHasLooperCallbacks;
+ // If there are any errors associated with the Looper this flag is set to true and
+ // mWakeLockRefCount is reset to zero. needsWakeLock method will always return false, if this
+ // flag is set.
+ bool mDead;
+
+ bool mDataInjectionMode;
+ struct FlushInfo {
+ // The number of flush complete events dropped for this sensor is stored here. They are
+ // sent separately before the next batch of events.
+ int mPendingFlushEventsToSend;
+
+ // Every activate is preceded by a flush. Only after the first flush complete is received,
+ // the events for the sensor are sent on that *connection*.
+ bool mFirstFlushPending;
+
+ FlushInfo() : mPendingFlushEventsToSend(0), mFirstFlushPending(false) {}
+ };
+ // protected by SensorService::mLock. Key for this vector is the sensor handle.
+ KeyedVector<int, FlushInfo> mSensorInfo;
+
+ sensors_event_t *mEventCache;
+ int mCacheSize, mMaxCacheSize;
+ String8 mPackageName;
+ const String16 mOpPackageName;
+#if DEBUG_CONNECTIONS
+ int mEventsReceived, mEventsSent, mEventsSentFromCache;
+ int mTotalAcksNeeded, mTotalAcksReceived;
+#endif
+
+};
+
+} // namepsace android
+
+#endif // ANDROID_SENSOR_EVENT_CONNECTION_H
+