chromium/third_party/blink/renderer/core/loader/long_task_detector.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_LONG_TASK_DETECTOR_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_LONG_TASK_DETECTOR_H_

#include "base/task/sequence_manager/task_time_observer.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/scheduler/public/thread.h"

namespace blink {

class CORE_EXPORT LongTaskObserver : public GarbageCollectedMixin { … };

// LongTaskDetector detects tasks longer than kLongTaskThreshold and notifies
// observers. When it has non-zero LongTaskObserver, it adds itself as a
// TaskTimeObserver on the main thread and observes every task. When the number
// of LongTaskObservers drop to zero it automatically removes itself as a
// TaskTimeObserver.
class CORE_EXPORT LongTaskDetector final
    : public GarbageCollected<LongTaskDetector>,
      public base::sequence_manager::TaskTimeObserver { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LOADER_LONG_TASK_DETECTOR_H_