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/*
* Copyright (C) 2009 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.
*/
#pragma once
#include <cstdint>
#include <future>
#include <type_traits>
#include <utility>
#include <android-base/thread_annotations.h>
#include <gui/IDisplayEventConnection.h>
#include <private/gui/BitTube.h>
#include <utils/Looper.h>
#include <utils/Timers.h>
#include "EventThread.h"
#include "TracedOrdinal.h"
#include "VSyncDispatch.h"
namespace android {
class SurfaceFlinger;
template <typename F>
class Task : public MessageHandler {
template <typename G>
friend auto makeTask(G&&);
explicit Task(F&& f) : mTask(std::move(f)) {}
void handleMessage(const Message&) override { mTask(); }
using T = std::invoke_result_t<F>;
std::packaged_task<T()> mTask;
};
template <typename F>
inline auto makeTask(F&& f) {
sp<Task<F>> task = new Task<F>(std::move(f));
return std::make_pair(task, task->mTask.get_future());
}
class MessageQueue {
public:
enum {
INVALIDATE = 0,
REFRESH = 1,
};
virtual ~MessageQueue() = default;
virtual void init(const sp<SurfaceFlinger>& flinger) = 0;
virtual void initVsync(scheduler::VSyncDispatch&, frametimeline::TokenManager&,
std::chrono::nanoseconds workDuration) = 0;
virtual void setDuration(std::chrono::nanoseconds workDuration) = 0;
virtual void setInjector(sp<EventThreadConnection>) = 0;
virtual void waitMessage() = 0;
virtual void postMessage(sp<MessageHandler>&&) = 0;
virtual void invalidate() = 0;
virtual void refresh() = 0;
virtual std::optional<std::chrono::steady_clock::time_point> nextExpectedInvalidate() = 0;
};
// ---------------------------------------------------------------------------
namespace impl {
class MessageQueue : public android::MessageQueue {
protected:
class Handler : public MessageHandler {
enum : uint32_t {
eventMaskInvalidate = 0x1,
eventMaskRefresh = 0x2,
eventMaskTransaction = 0x4
};
MessageQueue& mQueue;
std::atomic<uint32_t> mEventMask;
std::atomic<int64_t> mVsyncId;
std::atomic<nsecs_t> mExpectedVSyncTime;
public:
explicit Handler(MessageQueue& queue) : mQueue(queue), mEventMask(0) {}
void handleMessage(const Message& message) override;
virtual void dispatchRefresh();
virtual void dispatchInvalidate(int64_t vsyncId, nsecs_t expectedVSyncTimestamp);
virtual bool invalidatePending();
};
friend class Handler;
sp<SurfaceFlinger> mFlinger;
sp<Looper> mLooper;
struct Vsync {
frametimeline::TokenManager* tokenManager = nullptr;
std::unique_ptr<scheduler::VSyncCallbackRegistration> registration;
std::mutex mutex;
TracedOrdinal<std::chrono::nanoseconds> workDuration
GUARDED_BY(mutex) = {"VsyncWorkDuration-sf", std::chrono::nanoseconds(0)};
std::chrono::nanoseconds lastCallbackTime GUARDED_BY(mutex) = std::chrono::nanoseconds{0};
bool scheduled GUARDED_BY(mutex) = false;
std::optional<nsecs_t> expectedWakeupTime GUARDED_BY(mutex);
TracedOrdinal<int> value = {"VSYNC-sf", 0};
};
struct Injector {
gui::BitTube tube;
std::mutex mutex;
sp<EventThreadConnection> connection GUARDED_BY(mutex);
};
Vsync mVsync;
Injector mInjector;
sp<Handler> mHandler;
void vsyncCallback(nsecs_t vsyncTime, nsecs_t targetWakeupTime, nsecs_t readyTime);
void injectorCallback();
public:
~MessageQueue() override = default;
void init(const sp<SurfaceFlinger>& flinger) override;
void initVsync(scheduler::VSyncDispatch&, frametimeline::TokenManager&,
std::chrono::nanoseconds workDuration) override;
void setDuration(std::chrono::nanoseconds workDuration) override;
void setInjector(sp<EventThreadConnection>) override;
void waitMessage() override;
void postMessage(sp<MessageHandler>&&) override;
// sends INVALIDATE message at next VSYNC
void invalidate() override;
// sends REFRESH message at next VSYNC
void refresh() override;
std::optional<std::chrono::steady_clock::time_point> nextExpectedInvalidate() override;
};
} // namespace impl
} // namespace android
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