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 | |
35 | namespace WebCore { |
36 | |
37 | class ScriptExecutionContext; |
38 | |
39 | class AbortSignal final : public RefCounted<AbortSignal>, public EventTargetWithInlineData, public CanMakeWeakPtr<AbortSignal>, private ContextDestructionObserver { |
40 | WTF_MAKE_ISO_ALLOCATED(AbortSignal); |
41 | public: |
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 | |
56 | private: |
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 | |