80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ContextDestructionObserver.h"
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#include "EventTarget.h"
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#include "JSDOMPromiseDeferred.h"
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#include <wtf/Function.h>
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#include <wtf/Ref.h>
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#include <wtf/RefCounted.h>
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#include <wtf/WeakPtr.h>
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namespace WebCore {
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class AbortAlgorithm;
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class ScriptExecutionContext;
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class AbortSignal final : public RefCounted<AbortSignal>, public EventTargetWithInlineData, private ContextDestructionObserver {
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WTF_MAKE_ISO_ALLOCATED_EXPORT(AbortSignal, WEBCORE_EXPORT);
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public:
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static Ref<AbortSignal> create(ScriptExecutionContext&);
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static Ref<AbortSignal> abort(ScriptExecutionContext&);
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static bool whenSignalAborted(AbortSignal&, Ref<AbortAlgorithm>&&);
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void signalAbort();
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void signalFollow(AbortSignal&);
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bool aborted() const { return m_aborted; }
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using RefCounted::ref;
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using RefCounted::deref;
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using Algorithm = Function<void()>;
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void addAlgorithm(Algorithm&& algorithm) { m_algorithms.append(WTFMove(algorithm)); }
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bool isFollowingSignal() const { return !!m_followingSignal; }
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private:
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enum class Aborted : bool { No, Yes };
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explicit AbortSignal(ScriptExecutionContext&, Aborted = Aborted::No);
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// EventTarget.
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EventTargetInterface eventTargetInterface() const final { return AbortSignalEventTargetInterfaceType; }
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ScriptExecutionContext* scriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); }
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void refEventTarget() final { ref(); }
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void derefEventTarget() final { deref(); }
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bool m_aborted { false };
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Vector<Algorithm> m_algorithms;
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WeakPtr<AbortSignal> m_followingSignal;
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};
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}
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