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/*
* Copyright (C) 2020 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 <PowerStatsAidl.h>
#include <utils/Looper.h>
#include <utils/Thread.h>
#include <cstdio>
#include <cstring>
#include <mutex>
#include <thread>
#include <unordered_map>
namespace aidl {
namespace android {
namespace hardware {
namespace power {
namespace stats {
class DisplayStateResidencyDataProvider : public PowerStats::IStateResidencyDataProvider {
public:
// name = powerEntityName to be associated with this data provider
// path = path to the display state file descriptor
// state = list of states to be tracked
DisplayStateResidencyDataProvider(std::string name, std::string path,
std::vector<std::string> states);
~DisplayStateResidencyDataProvider();
// Methods from PowerStats::IStateResidencyDataProvider
bool getStateResidencies(
std::unordered_map<std::string, std::vector<StateResidency>> *residencies) override;
std::unordered_map<std::string, std::vector<State>> getInfo() override;
private:
// Poll for display state changes
void pollLoop();
// Main function to update the stats when display state change is detected
void updateStats();
// File descriptor of display state
int mFd;
// Path to display state file descriptor
const std::string mPath;
// Power Entity name associated with this data provider
const std::string mName;
// List of states to track indexed by mCurState
std::vector<std::string> mStates;
// Lock to protect concurrent read/write to mResidencies and mCurState
std::mutex mLock;
// Accumulated display state stats indexed by mCurState
std::vector<StateResidency> mResidencies;
// Index of current state
int mCurState;
// Looper to facilitate polling of display state file desciptor
::android::sp<::android::Looper> mLooper;
std::thread mThread;
};
} // namespace stats
} // namespace power
} // namespace hardware
} // namespace android
} // namespace aidl
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