1 | /* |
2 | * Copyright (C) 2016 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 "ActiveDOMObject.h" |
29 | #include "ScriptExecutionContext.h" |
30 | #include <wtf/Threading.h> |
31 | |
32 | #if ENABLE(INDEXED_DATABASE) |
33 | |
34 | namespace WebCore { |
35 | |
36 | class IDBActiveDOMObject : public ActiveDOMObject { |
37 | public: |
38 | Thread& originThread() const { return m_originThread.get(); } |
39 | |
40 | void contextDestroyed() final { |
41 | ASSERT(m_originThread.ptr() == &Thread::current()); |
42 | |
43 | Locker<Lock> lock(m_scriptExecutionContextLock); |
44 | ActiveDOMObject::contextDestroyed(); |
45 | } |
46 | |
47 | template<typename T, typename... Parameters, typename... Arguments> |
48 | void performCallbackOnOriginThread(T& object, void (T::*method)(Parameters...), Arguments&&... arguments) |
49 | { |
50 | ASSERT(&originThread() == &object.originThread()); |
51 | |
52 | if (&object.originThread() == &Thread::current()) { |
53 | (object.*method)(arguments...); |
54 | return; |
55 | } |
56 | |
57 | Locker<Lock> lock(m_scriptExecutionContextLock); |
58 | |
59 | ScriptExecutionContext* context = scriptExecutionContext(); |
60 | if (!context) |
61 | return; |
62 | |
63 | context->postCrossThreadTask(object, method, arguments...); |
64 | } |
65 | |
66 | void callFunctionOnOriginThread(WTF::Function<void ()>&& function) |
67 | { |
68 | if (&originThread() == &Thread::current()) { |
69 | function(); |
70 | return; |
71 | } |
72 | |
73 | Locker<Lock> lock(m_scriptExecutionContextLock); |
74 | |
75 | ScriptExecutionContext* context = scriptExecutionContext(); |
76 | if (!context) |
77 | return; |
78 | |
79 | context->postTask(WTFMove(function)); |
80 | } |
81 | |
82 | protected: |
83 | IDBActiveDOMObject(ScriptExecutionContext* context) |
84 | : ActiveDOMObject(context) |
85 | { |
86 | ASSERT(context); |
87 | } |
88 | |
89 | private: |
90 | Ref<Thread> m_originThread { Thread::current() }; |
91 | Lock m_scriptExecutionContextLock; |
92 | }; |
93 | |
94 | } // namespace WebCore |
95 | |
96 | #endif // ENABLE(INDEXED_DATABASE) |
97 | |