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
34namespace WebCore {
35
36class IDBActiveDOMObject : public ActiveDOMObject {
37public:
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
82protected:
83 IDBActiveDOMObject(ScriptExecutionContext* context)
84 : ActiveDOMObject(context)
85 {
86 ASSERT(context);
87 }
88
89private:
90 Ref<Thread> m_originThread { Thread::current() };
91 Lock m_scriptExecutionContextLock;
92};
93
94} // namespace WebCore
95
96#endif // ENABLE(INDEXED_DATABASE)
97