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_INITIAL_DISPLAY_STATE_INITIAL_DISPLAY_STATE_DATA_SOURCE_H_ 18 #define SRC_TRACED_PROBES_INITIAL_DISPLAY_STATE_INITIAL_DISPLAY_STATE_DATA_SOURCE_H_ 19 20 #include <memory> 21 22 #include "perfetto/ext/base/optional.h" 23 #include "perfetto/ext/base/weak_ptr.h" 24 #include "perfetto/ext/tracing/core/trace_writer.h" 25 #include "src/traced/probes/probes_data_source.h" 26 27 namespace perfetto { 28 29 namespace base { 30 class TaskRunner; 31 } 32 33 class InitialDisplayStateDataSource : public ProbesDataSource { 34 public: 35 static const ProbesDataSource::Descriptor descriptor; 36 37 InitialDisplayStateDataSource(base::TaskRunner* task_runner, 38 const DataSourceConfig& ds_config, 39 TracingSessionID session_id, 40 std::unique_ptr<TraceWriter> writer); 41 42 // ProbesDataSource implementation. 43 void Start() override; 44 void Flush(FlushRequestID, std::function<void()> callback) override; 45 46 // Virtual for testing. 47 virtual const base::Optional<std::string> ReadProperty( 48 const std::string name); 49 50 private: 51 void Tick(); 52 base::WeakPtr<InitialDisplayStateDataSource> GetWeakPtr() const; 53 void WriteState(); 54 55 base::TaskRunner* const task_runner_; 56 std::unique_ptr<TraceWriter> writer_; 57 uint32_t poll_period_ms_ = 0; 58 base::WeakPtrFactory<InitialDisplayStateDataSource> 59 weak_factory_; // Keep last. 60 }; 61 62 } // namespace perfetto 63 64 #endif // SRC_TRACED_PROBES_INITIAL_DISPLAY_STATE_INITIAL_DISPLAY_STATE_DATA_SOURCE_H_ 65