1/*
2 * Copyright (C) 2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ContextDestructionObserver.h"
29#include "EventTarget.h"
30#include <wtf/Function.h>
31#include <wtf/Ref.h>
32#include <wtf/RefCounted.h>
33#include <wtf/WeakPtr.h>
34
35namespace WebCore {
36
37class ScriptExecutionContext;
38
39class AbortSignal final : public RefCounted<AbortSignal>, public EventTargetWithInlineData, public CanMakeWeakPtr<AbortSignal>, private ContextDestructionObserver {
40 WTF_MAKE_ISO_ALLOCATED(AbortSignal);
41public:
42 static Ref<AbortSignal> create(ScriptExecutionContext&);
43
44 void abort();
45
46 bool aborted() const { return m_aborted; }
47
48 using RefCounted::ref;
49 using RefCounted::deref;
50
51 using Algorithm = WTF::Function<void()>;
52 void addAlgorithm(Algorithm&& algorithm) { m_algorithms.append(WTFMove(algorithm)); }
53
54 void follow(AbortSignal&);
55
56private:
57 explicit AbortSignal(ScriptExecutionContext&);
58
59 EventTargetInterface eventTargetInterface() const final { return AbortSignalEventTargetInterfaceType; }
60 ScriptExecutionContext* scriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); }
61 void refEventTarget() final { ref(); }
62 void derefEventTarget() final { deref(); }
63
64 bool m_aborted { false };
65 Vector<Algorithm> m_algorithms;
66};
67
68}
69
70