1 /* 2 * Copyright (C) 2023 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 INCLUDE_PERFETTO_EXT_CLOUD_TRACE_PROCESSOR_ENVIRONMENT_H_ 18 #define INCLUDE_PERFETTO_EXT_CLOUD_TRACE_PROCESSOR_ENVIRONMENT_H_ 19 20 #include <functional> 21 #include <memory> 22 #include <vector> 23 24 #include "perfetto/base/status.h" 25 #include "perfetto/base/task_runner.h" 26 #include "perfetto/ext/base/status_or.h" 27 #include "perfetto/ext/base/threading/stream.h" 28 29 namespace perfetto { 30 namespace cloud_trace_processor { 31 32 // Shim interface allowing embedders to change how operations which interact 33 // with the OS operate (e.g. IO, networking etc). 34 class CtpEnvironment { 35 public: 36 virtual ~CtpEnvironment(); 37 38 // Opens the file at |path| and reads the contents in chunks, returning the 39 // the chunks as a Stream. The size of the chunks is implementation defined 40 // but should be sized to balance memory use and syscall count. 41 virtual base::StatusOrStream<std::vector<uint8_t>> ReadFile( 42 const std::string& path) = 0; 43 }; 44 45 } // namespace cloud_trace_processor 46 } // namespace perfetto 47 48 #endif // INCLUDE_PERFETTO_EXT_CLOUD_TRACE_PROCESSOR_ENVIRONMENT_H_ 49