WorkerEventLoop.h   [plain text]

/*
 * Copyright (C) 2019 Apple 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
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 * 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 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

#pragma once

#include "ActiveDOMObject.h"
#include "EventLoop.h"

namespace WebCore {

class WorkerGlobalScope;
class WorkletGlobalScope;

class WorkerEventLoop final : public EventLoop, private ContextDestructionObserver {
public:
    // Explicitly take WorkerGlobalScope and WorkletGlobalScope for documentation purposes.
    static Ref<WorkerEventLoop> create(WorkerGlobalScope&);

#if ENABLE(CSS_PAINTING_API)
    static Ref<WorkerEventLoop> create(WorkletGlobalScope&);
#endif

    virtual ~WorkerEventLoop();

    // FIXME: This should be removed once MicrotaskQueue is integrated with EventLoopTaskGroup.
    void clearMicrotaskQueue();

private:
    explicit WorkerEventLoop(ScriptExecutionContext&);

    void scheduleToRun() final;
    bool isContextThread() const;
    MicrotaskQueue& microtaskQueue() final;

    std::unique_ptr<MicrotaskQueue> m_microtaskQueue;
};

} // namespace WebCore