1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 #pragma once 19 20 #include <thread> 21 #include <vector> 22 #include <mutex> 23 #include <condition_variable> 24 25 namespace swappy { 26 27 class ChoreographerFilter { 28 public: 29 using Worker = std::function<std::chrono::nanoseconds()>; 30 31 explicit ChoreographerFilter(std::chrono::nanoseconds refreshPeriod, 32 std::chrono::nanoseconds appToSfDelay, 33 Worker doWork); 34 ~ChoreographerFilter(); 35 36 void onChoreographer(); 37 38 private: 39 void launchThreadsLocked(); 40 void terminateThreadsLocked(); 41 42 void onSettingsChanged(); 43 44 void threadMain(bool useAffinity, int32_t thread); 45 46 std::mutex mThreadPoolMutex; 47 bool mUseAffinity = true; 48 std::vector<std::thread> mThreadPool; 49 50 std::mutex mMutex; 51 std::condition_variable mCondition; 52 bool mIsRunning = true; 53 int64_t mSequenceNumber = 0; 54 std::chrono::steady_clock::time_point mLastTimestamp; 55 56 std::mutex mWorkMutex; 57 std::chrono::steady_clock::time_point mLastWorkRun; 58 std::chrono::nanoseconds mWorkDuration; 59 60 const std::chrono::nanoseconds mRefreshPeriod; 61 const std::chrono::nanoseconds mAppToSfDelay; 62 const Worker mDoWork; 63 }; 64 65 } // namespace swappy 66