9e3adfcebf
i) Fix a possible race condition when adding a pending flush connection to mActiveSensors data structure. ii) Invalidate flush_complete_events as soon as they are consumed by a connection so that they are not used by other connections which are registered for the same sensor. Change-Id: I1491bea8c2081c4aab1feacc60add13b7aa26bb7
95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_SENSOR_EVENT_QUEUE_H
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#define ANDROID_SENSOR_EVENT_QUEUE_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <utils/Timers.h>
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#include <gui/BitTube.h>
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// ----------------------------------------------------------------------------
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#define WAKE_UP_SENSOR_EVENT_NEEDS_ACK (1U << 30)
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struct ALooper;
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struct ASensorEvent;
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// Concrete types for the NDK
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struct ASensorEventQueue {
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ALooper* looper;
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};
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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class ISensorEventConnection;
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class Sensor;
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class Looper;
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// ----------------------------------------------------------------------------
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class SensorEventQueue : public ASensorEventQueue, public RefBase
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{
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public:
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enum { MAX_RECEIVE_BUFFER_EVENT_COUNT = 256 };
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SensorEventQueue(const sp<ISensorEventConnection>& connection);
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virtual ~SensorEventQueue();
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virtual void onFirstRef();
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int getFd() const;
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static ssize_t write(const sp<BitTube>& tube,
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ASensorEvent const* events, size_t numEvents);
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ssize_t read(ASensorEvent* events, size_t numEvents);
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status_t waitForEvent() const;
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status_t wake() const;
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status_t enableSensor(Sensor const* sensor) const;
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status_t disableSensor(Sensor const* sensor) const;
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status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
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// these are here only to support SensorManager.java
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status_t enableSensor(int32_t handle, int32_t samplingPeriodUs, int maxBatchReportLatencyUs,
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int reservedFlags) const;
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status_t disableSensor(int32_t handle) const;
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status_t flush() const;
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// Send an ack for every wake_up sensor event that is set to WAKE_UP_SENSOR_EVENT_NEEDS_ACK.
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void sendAck(const ASensorEvent* events, int count);
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private:
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sp<Looper> getLooper() const;
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sp<ISensorEventConnection> mSensorEventConnection;
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sp<BitTube> mSensorChannel;
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mutable Mutex mLock;
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mutable sp<Looper> mLooper;
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ASensorEvent* mRecBuffer;
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size_t mAvailable;
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size_t mConsumed;
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};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_SENSOR_EVENT_QUEUE_H
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