1 /* 2 * Copyright (C) 2025 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_ANDROID_KERNEL_WAKELOCKS_ANDROID_KERNEL_WAKELOCKS_DATA_SOURCE_H_ 18 #define SRC_TRACED_PROBES_ANDROID_KERNEL_WAKELOCKS_ANDROID_KERNEL_WAKELOCKS_DATA_SOURCE_H_ 19 20 #include <memory> 21 22 #include "perfetto/ext/base/flat_hash_map.h" 23 #include "perfetto/ext/base/scoped_file.h" 24 #include "perfetto/ext/base/weak_ptr.h" 25 #include "perfetto/tracing/core/data_source_config.h" 26 #include "src/traced/probes/probes_data_source.h" 27 28 namespace perfetto { 29 30 struct KernelWakelockInfo; 31 32 class TraceWriter; 33 namespace base { 34 class TaskRunner; 35 } 36 37 class AndroidKernelWakelocksDataSource : public ProbesDataSource { 38 public: 39 static const ProbesDataSource::Descriptor descriptor; 40 41 AndroidKernelWakelocksDataSource(const DataSourceConfig&, 42 base::TaskRunner*, 43 TracingSessionID, 44 std::unique_ptr<TraceWriter> writer); 45 46 ~AndroidKernelWakelocksDataSource() override; 47 48 // ProbesDataSource implementation. 49 void Start() override; 50 void Flush(FlushRequestID, std::function<void()> callback) override; 51 void ClearIncrementalState() override; 52 53 private: 54 struct DynamicLibLoader; 55 56 void Tick(); 57 void WriteKernelWakelocks(); 58 base::WeakPtr<AndroidKernelWakelocksDataSource> GetWeakPtr() const; 59 60 uint32_t poll_interval_ms_ = 0; 61 base::FlatHashMap<std::string, KernelWakelockInfo> wakelocks_; 62 uint32_t next_id_ = 0; 63 64 base::TaskRunner* const task_runner_; 65 std::unique_ptr<TraceWriter> writer_; 66 std::unique_ptr<DynamicLibLoader> lib_; 67 base::WeakPtrFactory<AndroidKernelWakelocksDataSource> 68 weak_factory_; // Keep last. 69 }; 70 71 } // namespace perfetto 72 73 #endif // SRC_TRACED_PROBES_ANDROID_KERNEL_WAKELOCKS_ANDROID_KERNEL_WAKELOCKS_DATA_SOURCE_H_ 74