1 | /* |
2 | * Copyright (C) 2008 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. ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | * |
25 | */ |
26 | |
27 | #include "config.h" |
28 | #include "ContextDestructionObserver.h" |
29 | |
30 | #include "ScriptExecutionContext.h" |
31 | |
32 | namespace WebCore { |
33 | |
34 | ContextDestructionObserver::ContextDestructionObserver(ScriptExecutionContext* scriptExecutionContext) |
35 | : m_scriptExecutionContext(nullptr) |
36 | { |
37 | observeContext(scriptExecutionContext); |
38 | } |
39 | |
40 | ContextDestructionObserver::~ContextDestructionObserver() |
41 | { |
42 | observeContext(nullptr); |
43 | } |
44 | |
45 | void ContextDestructionObserver::observeContext(ScriptExecutionContext* scriptExecutionContext) |
46 | { |
47 | if (m_scriptExecutionContext) { |
48 | ASSERT(m_scriptExecutionContext->isContextThread()); |
49 | m_scriptExecutionContext->willDestroyDestructionObserver(*this); |
50 | } |
51 | |
52 | m_scriptExecutionContext = scriptExecutionContext; |
53 | |
54 | if (m_scriptExecutionContext) { |
55 | ASSERT(m_scriptExecutionContext->isContextThread()); |
56 | m_scriptExecutionContext->didCreateDestructionObserver(*this); |
57 | } |
58 | } |
59 | |
60 | void ContextDestructionObserver::contextDestroyed() |
61 | { |
62 | m_scriptExecutionContext = nullptr; |
63 | } |
64 | |
65 | } // namespace WebCore |
66 | |