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// 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 BASE_TRACING_PERFETTO_PLATFORM_H_
#define BASE_TRACING_PERFETTO_PLATFORM_H_
#include "third_party/perfetto/include/perfetto/base/thread_utils.h"
#include "third_party/perfetto/include/perfetto/tracing/platform.h"
#include "base/base_export.h"
#include "base/memory/scoped_refptr.h"
#include "base/threading/thread_local_storage.h"
namespace base {
class DeferredSequencedTaskRunner;
namespace tracing {
class BASE_EXPORT PerfettoPlatform : public perfetto::Platform {
public:
// Specifies the type of task runner used by Perfetto.
// TODO(skyostil): Move all scenarios to use the default task runner to
// avoid problems with unexpected re-entrancy and IPC deadlocks.
enum class TaskRunnerType {
// Use Perfetto's own task runner which runs tasks on a dedicated (internal)
// thread.
kBuiltin,
// Use base::ThreadPool.
kThreadPool,
};
explicit PerfettoPlatform(TaskRunnerType = TaskRunnerType::kThreadPool);
~PerfettoPlatform() override;
SequencedTaskRunner* task_runner() const;
bool did_start_task_runner() const { return did_start_task_runner_; }
void StartTaskRunner(scoped_refptr<SequencedTaskRunner>);
// perfetto::Platform implementation:
ThreadLocalObject* GetOrCreateThreadLocalObject() override;
std::unique_ptr<perfetto::base::TaskRunner> CreateTaskRunner(
const CreateTaskRunnerArgs&) override;
std::string GetCurrentProcessName() override;
// Chrome uses different thread IDs than Perfetto on Mac. So we need to
// override this method to keep Perfetto tracks consistent with Chrome
// thread IDs.
perfetto::base::PlatformThreadId GetCurrentThreadId() override;
private:
const TaskRunnerType task_runner_type_;
scoped_refptr<DeferredSequencedTaskRunner> deferred_task_runner_;
bool did_start_task_runner_ = false;
ThreadLocalStorage::Slot thread_local_object_;
};
} // namespace tracing
} // namespace base
#endif // BASE_TRACING_PERFETTO_PLATFORM_H_
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