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

// Copyright 2018 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_TRACE_EVENT_DATA_SOURCE_H_
#define SERVICES_TRACING_PUBLIC_CPP_PERFETTO_TRACE_EVENT_DATA_SOURCE_H_

#include <atomic>
#include <memory>
#include <optional>
#include <string>
#include <vector>

#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted_memory.h"
#include "base/metrics/histogram_base.h"
#include "base/metrics/statistics_recorder.h"
#include "base/metrics/user_metrics.h"
#include "base/no_destructor.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "base/thread_annotations.h"
#include "base/threading/thread_local.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "base/trace_event/trace_config.h"
#include "base/trace_event/typed_macros.h"
#include "services/tracing/public/cpp/perfetto/perfetto_traced_process.h"
#include "services/tracing/public/cpp/perfetto/track_event_thread_local_event_sink.h"
#include "third_party/perfetto/protos/perfetto/trace/chrome/chrome_metadata.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pbzero.h"

namespace base::trace_event {
class TraceEvent;
struct TraceEventHandle;
}  // namespace base::trace_event

namespace perfetto {
class TraceWriter;
}

namespace tracing {

class ThreadLocalEventSink;

// This class is a data source that clients can use to provide
// global metadata in dictionary form, by registering callbacks.
class COMPONENT_EXPORT(TRACING_CPP) TraceEventMetadataSource
    : public PerfettoTracedProcess::DataSourceBase { … };

// This class acts as a bridge between the TraceLog and
// the PerfettoProducer. It converts incoming
// trace events to ChromeTraceEvent protos and writes
// them into the Perfetto shared memory.
class COMPONENT_EXPORT(TRACING_CPP) TraceEventDataSource
    : public PerfettoTracedProcess::DataSourceBase { … };

}  // namespace tracing

#endif  // SERVICES_TRACING_PUBLIC_CPP_PERFETTO_TRACE_EVENT_DATA_SOURCE_H_