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/*
* Copyright (C) 2017-2023 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
* 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 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ContextDestructionObserverInlines.h"
#include "EventTarget.h"
#include "JSValueInWrappedObject.h"
#include <wtf/Function.h>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakListHashSet.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class AbortAlgorithm;
class ScriptExecutionContext;
class WebCoreOpaqueRoot;
class AbortSignal final : public RefCounted<AbortSignal>, public EventTarget, private ContextDestructionObserver {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_EXPORT(AbortSignal, WEBCORE_EXPORT);
public:
static Ref<AbortSignal> create(ScriptExecutionContext*);
WEBCORE_EXPORT ~AbortSignal();
static Ref<AbortSignal> abort(JSDOMGlobalObject&, ScriptExecutionContext&, JSC::JSValue reason);
static Ref<AbortSignal> timeout(ScriptExecutionContext&, uint64_t milliseconds);
static Ref<AbortSignal> any(ScriptExecutionContext&, const Vector<Ref<AbortSignal>>&);
static uint32_t addAbortAlgorithmToSignal(AbortSignal&, Ref<AbortAlgorithm>&&);
static void removeAbortAlgorithmFromSignal(AbortSignal&, uint32_t algorithmIdentifier);
void signalAbort(JSC::JSValue reason);
void signalFollow(AbortSignal&);
bool aborted() const { return m_aborted; }
const JSValueInWrappedObject& reason() const { return m_reason; }
bool hasActiveTimeoutTimer() const { return m_hasActiveTimeoutTimer; }
bool hasAbortEventListener() const { return m_hasAbortEventListener; }
using RefCounted::ref;
using RefCounted::deref;
using Algorithm = Function<void(JSC::JSValue reason)>;
uint32_t addAlgorithm(Algorithm&&);
void removeAlgorithm(uint32_t);
bool isFollowingSignal() const { return !!m_followingSignal; }
void throwIfAborted(JSC::JSGlobalObject&);
using AbortSignalSet = WeakListHashSet<AbortSignal, WeakPtrImplWithEventTargetData>;
const AbortSignalSet& sourceSignals() const { return m_sourceSignals; }
AbortSignalSet& sourceSignals() { return m_sourceSignals; }
bool isDependent() const { return m_isDependent; }
private:
enum class Aborted : bool { No, Yes };
explicit AbortSignal(ScriptExecutionContext*, Aborted = Aborted::No, JSC::JSValue reason = JSC::jsUndefined());
void setHasActiveTimeoutTimer(bool hasActiveTimeoutTimer) { m_hasActiveTimeoutTimer = hasActiveTimeoutTimer; }
void markAsDependent() { m_isDependent = true; }
void addSourceSignal(AbortSignal&);
void addDependentSignal(AbortSignal&);
void markAborted(JSC::JSValue);
void runAbortSteps();
// EventTarget.
enum EventTargetInterfaceType eventTargetInterface() const final { return EventTargetInterfaceType::AbortSignal; }
ScriptExecutionContext* scriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); }
void refEventTarget() final { ref(); }
void derefEventTarget() final { deref(); }
void eventListenersDidChange() final;
Vector<std::pair<uint32_t, Algorithm>> m_algorithms;
WeakPtr<AbortSignal, WeakPtrImplWithEventTargetData> m_followingSignal;
AbortSignalSet m_sourceSignals;
AbortSignalSet m_dependentSignals;
JSValueInWrappedObject m_reason;
uint32_t m_algorithmIdentifier { 0 };
bool m_aborted { false };
bool m_hasActiveTimeoutTimer { false };
bool m_hasAbortEventListener { false };
bool m_isDependent { false };
};
WebCoreOpaqueRoot root(AbortSignal*);
} // namespace WebCore
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