1 /* 2 * Copyright (C) 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 #ifndef SRC_TRACED_PROBES_PROBES_DATA_SOURCE_H_ 18 #define SRC_TRACED_PROBES_PROBES_DATA_SOURCE_H_ 19 20 #include <functional> 21 22 #include "perfetto/base/logging.h" 23 #include "perfetto/tracing/core/basic_types.h" 24 25 namespace perfetto { 26 27 // Base class for all data sources in traced_probes. 28 class ProbesDataSource { 29 public: 30 // |type_id| is a home-brewed RTTI, e.g. InodeFileDataSource::kTypeId. 31 ProbesDataSource(TracingSessionID, int type_id); 32 virtual ~ProbesDataSource(); 33 34 virtual void Start() = 0; 35 virtual void Flush(FlushRequestID, std::function<void()> callback) = 0; 36 37 // Only data sources that opt in via DataSourceDescriptor should receive this 38 // call. ClearIncrementalState()39 virtual void ClearIncrementalState() { 40 PERFETTO_ELOG( 41 "ClearIncrementalState received by data source that doesn't provide " 42 "its own implementation."); 43 } 44 45 const TracingSessionID tracing_session_id; 46 const int type_id; 47 bool started = false; // Set by probes_producer.cc. 48 49 private: 50 ProbesDataSource(const ProbesDataSource&) = delete; 51 ProbesDataSource& operator=(const ProbesDataSource&) = delete; 52 }; 53 54 } // namespace perfetto 55 56 #endif // SRC_TRACED_PROBES_PROBES_DATA_SOURCE_H_ 57