chromium/services/tracing/public/cpp/perfetto/perfetto_tracing_backend.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_TRACING_PUBLIC_CPP_PERFETTO_PERFETTO_TRACING_BACKEND_H_
#define SERVICES_TRACING_PUBLIC_CPP_PERFETTO_PERFETTO_TRACING_BACKEND_H_

#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/perfetto/include/perfetto/tracing/tracing_backend.h"

namespace tracing {
namespace mojom {
class ConsumerHost;
class PerfettoService;
class TracingService;
}  // namespace mojom

class ProducerEndpoint;
class ConsumerEndpoint;

// The Perfetto tracing backend mediates between the Perfetto client library and
// the mojo-based tracing service. It allows any process to emit trace data
// through Perfetto and privileged processes (i.e., the browser) to start
// tracing sessions and read back the resulting data.
//
//      Perfetto         :   Tracing backend     :    Tracing service
//                       :                       :
//                       :                      mojo
//                calls  : .------------------.  :  .--------------.
//             .---------->| ConsumerEndpoint |<--->| ConsumerHost |
//  .--------------.     : `------------------'  :  `--------------'
//  | TracingMuxer |     :                       :
//  `--------------'     : .------------------.  :  .--------------.
//             `---------->| ProducerEndpoint |<--->| ProducerHost |
//                       : `------------------'  :  `--------------'
//                       :                       :
class PerfettoTracingBackend : public perfetto::TracingBackend { … };

}  // namespace tracing

#endif  // SERVICES_TRACING_PUBLIC_CPP_PERFETTO_PERFETTO_TRACING_BACKEND_H_