deferred_task_handler.h | Explore in Territory

/*
 * Copyright (C) 2010, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_DEFERRED_TASK_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_DEFERRED_TASK_HANDLER_H_

#include <atomic>

#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/wtf/hash_set.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace blink {

class BaseAudioContext;
class OfflineAudioContext;
class AudioHandler;
class AudioNodeOutput;
class AudioSummingJunction;

// DeferredTaskHandler manages the major part of pre- and post- rendering tasks,
// and provides a lock mechanism against the audio rendering graph. A
// DeferredTaskHandler object is created when an BaseAudioContext object is
// created.
//
// DeferredTaskHandler outlives the BaseAudioContext only if all of the
// following conditions match:
// - An audio rendering thread is running,
// - It is requested to stop,
// - The audio rendering thread calls requestToDeleteHandlersOnMainThread(),
// - It posts a task of deleteHandlersOnMainThread(), and
// - GC happens and it collects the BaseAudioContext before the task execution.
//
class MODULES_EXPORT DeferredTaskHandler final
    : public ThreadSafeRefCounted<DeferredTaskHandler> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_DEFERRED_TASK_HANDLER_H_
chromium/third_party/blink/renderer/modules/webaudio/deferred_task_handler.h
