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/*
* Copyright (C) 2011 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_SURFACE_FLINGER_EVENT_THREAD_H
#define ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
#include <stdint.h>
#include <sys/types.h>
#include <gui/IDisplayEventConnection.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/KeyedVector.h>
#include "DisplayEventConnection.h"
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
class SurfaceFlinger;
class DisplayHardware;
class DisplayEventConnection;
// ---------------------------------------------------------------------------
class EventThread : public Thread {
friend class DisplayEventConnection;
public:
EventThread(const sp<SurfaceFlinger>& flinger);
sp<DisplayEventConnection> createEventConnection() const;
status_t registerDisplayEventConnection(
const sp<DisplayEventConnection>& connection);
status_t unregisterDisplayEventConnection(
const wp<DisplayEventConnection>& connection);
void setVsyncRate(uint32_t count,
const wp<DisplayEventConnection>& connection);
void requestNextVsync(const wp<DisplayEventConnection>& connection);
nsecs_t getLastVSyncTimestamp() const;
nsecs_t getVSyncPeriod() const;
void dump(String8& result, char* buffer, size_t SIZE) const;
private:
virtual bool threadLoop();
virtual status_t readyToRun();
virtual void onFirstRef();
struct ConnectionInfo {
ConnectionInfo() : count(-1) { }
// count >= 1 : continuous event. count is the vsync rate
// count == 0 : one-shot event that has not fired
// count ==-1 : one-shot event that fired this round / disabled
// count ==-2 : one-shot event that fired the round before
int32_t count;
};
void removeDisplayEventConnection(
const wp<DisplayEventConnection>& connection);
ConnectionInfo* getConnectionInfoLocked(
const wp<DisplayEventConnection>& connection);
// constants
sp<SurfaceFlinger> mFlinger;
const DisplayHardware& mHw;
mutable Mutex mLock;
mutable Condition mCondition;
// protected by mLock
KeyedVector< wp<DisplayEventConnection>, ConnectionInfo > mDisplayEventConnections;
nsecs_t mLastVSyncTimestamp;
// main thread only
size_t mDeliveredEvents;
};
// ---------------------------------------------------------------------------
}; // namespace android
// ---------------------------------------------------------------------------
#endif /* ANDROID_SURFACE_FLINGER_EVENT_THREAD_H */
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