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120 lines
3.7 KiB
120 lines
3.7 KiB
/*
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* Copyright 2018 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 <android-base/thread_annotations.h>
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#include <utils/RefBase.h>
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#include <utils/Timers.h>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <utility>
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#include <vector>
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#include "RefreshRateConfigs.h"
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namespace android {
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class Layer;
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class TestableScheduler;
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namespace scheduler {
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class LayerHistoryTest;
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class LayerInfo;
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class LayerHistory {
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public:
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using LayerVoteType = RefreshRateConfigs::LayerVoteType;
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LayerHistory(const RefreshRateConfigs&);
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~LayerHistory();
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// Layers are unregistered when the weak reference expires.
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void registerLayer(Layer*, LayerVoteType type);
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// Sets the display size. Client is responsible for synchronization.
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void setDisplayArea(uint32_t displayArea) { mDisplayArea = displayArea; }
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// Sets whether a mode change is pending to be applied
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void setModeChangePending(bool pending) { mModeChangePending = pending; }
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// Represents which layer activity is recorded
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enum class LayerUpdateType {
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Buffer, // a new buffer queued
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AnimationTX, // a new transaction with eAnimation flag set
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SetFrameRate, // setFrameRate API was called
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};
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// Marks the layer as active, and records the given state to its history.
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void record(Layer*, nsecs_t presentTime, nsecs_t now, LayerUpdateType updateType);
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using Summary = std::vector<RefreshRateConfigs::LayerRequirement>;
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// Rebuilds sets of active/inactive layers, and accumulates stats for active layers.
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Summary summarize(nsecs_t now);
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void clear();
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void deregisterLayer(Layer*);
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std::string dump() const;
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private:
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friend LayerHistoryTest;
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friend TestableScheduler;
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using LayerPair = std::pair<Layer*, std::unique_ptr<LayerInfo>>;
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using LayerInfos = std::vector<LayerPair>;
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struct ActiveLayers {
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LayerInfos& infos;
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const size_t index;
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auto begin() { return infos.begin(); }
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auto end() { return begin() + static_cast<long>(index); }
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};
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ActiveLayers activeLayers() REQUIRES(mLock) { return {mLayerInfos, mActiveLayersEnd}; }
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// Iterates over layers in a single pass, swapping pairs such that active layers precede
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// inactive layers, and inactive layers precede expired layers. Removes expired layers by
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// truncating after inactive layers.
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void partitionLayers(nsecs_t now) REQUIRES(mLock);
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mutable std::mutex mLock;
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// Partitioned such that active layers precede inactive layers. For fast lookup, the few active
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// layers are at the front, and weak pointers are stored in contiguous memory to hit the cache.
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LayerInfos mLayerInfos GUARDED_BY(mLock);
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size_t mActiveLayersEnd GUARDED_BY(mLock) = 0;
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uint32_t mDisplayArea = 0;
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// Whether to emit systrace output and debug logs.
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const bool mTraceEnabled;
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// Whether to use priority sent from WindowManager to determine the relevancy of the layer.
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const bool mUseFrameRatePriority;
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// Whether a mode change is in progress or not
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std::atomic<bool> mModeChangePending = false;
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};
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} // namespace scheduler
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} // namespace android
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