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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_DEVTOOLS_V8_SAMPLING_PROFILER_H_
#define CONTENT_RENDERER_DEVTOOLS_V8_SAMPLING_PROFILER_H_
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
#include "base/trace_event/trace_event_impl.h"
#include "content/common/content_export.h"
namespace content {
class Sampler;
class V8SamplingThread;
// The class monitors enablement of V8 CPU profiler and
// spawns a sampling thread when needed.
class CONTENT_EXPORT V8SamplingProfiler final
: public base::trace_event::TraceLog::EnabledStateObserver {
public:
explicit V8SamplingProfiler(bool underTest = false);
~V8SamplingProfiler();
// Implementation of TraceLog::EnabledStateObserver
void OnTraceLogEnabled() override;
void OnTraceLogDisabled() override;
void EnableSamplingEventForTesting(int code_added_events, int sample_events);
void WaitSamplingEventForTesting();
private:
void StartSamplingThread();
scoped_ptr<base::WaitableEvent> waitable_event_for_testing_;
scoped_ptr<V8SamplingThread> sampling_thread_;
scoped_ptr<Sampler> render_thread_sampler_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
DISALLOW_COPY_AND_ASSIGN(V8SamplingProfiler);
};
} // namespace content
#endif // CONTENT_RENDERER_DEVTOOLS_V8_SAMPLING_PROFILER_H_
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