1 /* 2 * Copyright 2017 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 #pragma once 18 19 #include <layerproto/LayerProtoHeader.h> 20 #include <utils/Errors.h> 21 22 #include <mutex> 23 24 using namespace android::surfaceflinger; 25 26 namespace android { 27 28 /* 29 * SurfaceTracing records layer states during surface flinging. 30 */ 31 class SurfaceTracing { 32 public: 33 void enable(); 34 status_t disable(); 35 bool isEnabled(); 36 37 void traceLayers(const char* where, LayersProto); 38 39 private: 40 static constexpr auto DEFAULT_FILENAME = "/data/misc/wmtrace/layers_trace.pb"; 41 42 status_t writeProtoFileLocked(); 43 44 bool mEnabled = false; 45 std::string mOutputFileName = DEFAULT_FILENAME; 46 std::mutex mTraceMutex; 47 LayersTraceFileProto mTrace; 48 }; 49 50 } // namespace android 51
