chromium/third_party/perfetto/include/perfetto/tracing/trace_writer_base.h

/*
 * Copyright (C) 2019 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 INCLUDE_PERFETTO_TRACING_TRACE_WRITER_BASE_H_
#define INCLUDE_PERFETTO_TRACING_TRACE_WRITER_BASE_H_

#include "perfetto/protozero/message_handle.h"

namespace perfetto {

namespace protos {
namespace pbzero {
class TracePacket;
}  // namespace pbzero
}  // namespace protos

// This is a single-thread write interface that allows to write protobufs
// directly into the tracing shared buffer without making any copies.
// The idea is that each data source creates one (or more) TraceWriter for each
// thread it wants to write from. Each TraceWriter will get its own dedicated
// chunk and will write into the shared buffer without any locking most of the
// time.

class TraceWriterBase { … };

}  // namespace perfetto

#endif  // INCLUDE_PERFETTO_TRACING_TRACE_WRITER_BASE_H_