/* * Copyright (C) 2017 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef SRC_TRACING_CORE_TRACE_WRITER_IMPL_H_ #define SRC_TRACING_CORE_TRACE_WRITER_IMPL_H_ #include "perfetto/base/proc_utils.h" #include "perfetto/ext/tracing/core/basic_types.h" #include "perfetto/ext/tracing/core/shared_memory_abi.h" #include "perfetto/ext/tracing/core/shared_memory_arbiter.h" #include "perfetto/ext/tracing/core/trace_writer.h" #include "perfetto/protozero/message_handle.h" #include "perfetto/protozero/proto_utils.h" #include "perfetto/protozero/root_message.h" #include "perfetto/protozero/scattered_stream_writer.h" #include "perfetto/tracing/buffer_exhausted_policy.h" #include "src/tracing/core/patch_list.h" namespace perfetto { class SharedMemoryArbiterImpl; // See //include/perfetto/ext/tracing/core/trace_writer.h for docs. // // Locking will happen only when a chunk is exhausted and a new one is // acquired from the arbiter. // // TODO: TraceWriter needs to keep the shared memory buffer alive (refcount?). // Otherwise if the shared memory buffer goes away (e.g. the Service crashes) // the TraceWriter will keep writing into unmapped memory. // class TraceWriterImpl : public TraceWriter, public protozero::MessageFinalizationListener, public protozero::ScatteredStreamWriter::Delegate { … }; } // namespace perfetto #endif // SRC_TRACING_CORE_TRACE_WRITER_IMPL_H_