119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
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* Copyright (C) 2009 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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#pragma once
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#include <cstdint>
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#include <future>
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#include <type_traits>
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#include <utility>
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#include <utils/Looper.h>
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#include <utils/Timers.h>
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#include <utils/threads.h>
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#include <gui/IDisplayEventConnection.h>
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#include <private/gui/BitTube.h>
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#include "EventThread.h"
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namespace android {
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class SurfaceFlinger;
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template <typename F>
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class Task : public MessageHandler {
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template <typename G>
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friend auto makeTask(G&&);
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explicit Task(F&& f) : mTask(std::move(f)) {}
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void handleMessage(const Message&) override { mTask(); }
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using T = std::invoke_result_t<F>;
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std::packaged_task<T()> mTask;
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};
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template <typename F>
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inline auto makeTask(F&& f) {
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sp<Task<F>> task = new Task<F>(std::move(f));
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return std::make_pair(task, task->mTask.get_future());
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}
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class MessageQueue {
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public:
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enum {
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INVALIDATE = 0,
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REFRESH = 1,
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};
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virtual ~MessageQueue() = default;
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virtual void init(const sp<SurfaceFlinger>& flinger) = 0;
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virtual void setEventConnection(const sp<EventThreadConnection>& connection) = 0;
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virtual void waitMessage() = 0;
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virtual void postMessage(sp<MessageHandler>&&) = 0;
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virtual void invalidate() = 0;
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virtual void refresh() = 0;
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};
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// ---------------------------------------------------------------------------
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namespace impl {
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class MessageQueue final : public android::MessageQueue {
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class Handler : public MessageHandler {
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enum { eventMaskInvalidate = 0x1, eventMaskRefresh = 0x2, eventMaskTransaction = 0x4 };
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MessageQueue& mQueue;
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int32_t mEventMask;
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std::atomic<nsecs_t> mExpectedVSyncTime;
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public:
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explicit Handler(MessageQueue& queue) : mQueue(queue), mEventMask(0) {}
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virtual void handleMessage(const Message& message);
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void dispatchRefresh();
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void dispatchInvalidate(nsecs_t expectedVSyncTimestamp);
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};
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friend class Handler;
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sp<SurfaceFlinger> mFlinger;
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sp<Looper> mLooper;
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sp<EventThreadConnection> mEvents;
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gui::BitTube mEventTube;
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sp<Handler> mHandler;
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static int cb_eventReceiver(int fd, int events, void* data);
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int eventReceiver(int fd, int events);
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public:
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~MessageQueue() override = default;
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void init(const sp<SurfaceFlinger>& flinger) override;
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void setEventConnection(const sp<EventThreadConnection>& connection) override;
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void waitMessage() override;
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void postMessage(sp<MessageHandler>&&) override;
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// sends INVALIDATE message at next VSYNC
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void invalidate() override;
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// sends REFRESH message at next VSYNC
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void refresh() override;
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};
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} // namespace impl
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} // namespace android
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