1 /* 2 * Copyright (C) 2020 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 #ifndef SRC_TRACED_PROBES_SYSTEM_INFO_SYSTEM_INFO_DATA_SOURCE_H_ 18 #define SRC_TRACED_PROBES_SYSTEM_INFO_SYSTEM_INFO_DATA_SOURCE_H_ 19 20 #include <memory> 21 22 #include "perfetto/ext/tracing/core/trace_writer.h" 23 #include "src/traced/probes/common/cpu_freq_info.h" 24 #include "src/traced/probes/probes_data_source.h" 25 26 namespace perfetto { 27 28 class SystemInfoDataSource : public ProbesDataSource { 29 public: 30 static const ProbesDataSource::Descriptor descriptor; 31 32 SystemInfoDataSource(TracingSessionID, 33 std::unique_ptr<TraceWriter> writer, 34 std::unique_ptr<CpuFreqInfo> cpu_freq_info); 35 36 // ProbesDataSource implementation. 37 void Start() override; 38 void Flush(FlushRequestID, std::function<void()> callback) override; 39 40 // Virtual for testing. 41 virtual std::string ReadFile(std::string path); 42 43 private: 44 std::unique_ptr<TraceWriter> writer_; 45 std::unique_ptr<CpuFreqInfo> cpu_freq_info_; 46 }; 47 48 } // namespace perfetto 49 50 #endif // SRC_TRACED_PROBES_SYSTEM_INFO_SYSTEM_INFO_DATA_SOURCE_H_ 51