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1 /* | |
2 * Copyright (C) 2009 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 COMPUTER, 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 COMPUTER, 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 #include "config.h" | |
27 #include "ArrayBuffer.h" | |
28 | |
29 #include "ArrayBufferView.h" | |
30 | |
31 #include <wtf/RefPtr.h> | |
32 #include <wtf/Vector.h> | |
33 | |
34 namespace WTF { | |
35 | |
36 bool ArrayBuffer::transfer(ArrayBufferContents& result, Vector<RefPtr<ArrayBuffe
rView> >& neuteredViews) | |
37 { | |
38 RefPtr<ArrayBuffer> keepAlive(this); | |
39 | |
40 if (!m_contents.m_data) { | |
41 result.m_data = 0; | |
42 return false; | |
43 } | |
44 | |
45 m_contents.transfer(result); | |
46 | |
47 while (m_firstView) { | |
48 ArrayBufferView* current = m_firstView; | |
49 removeView(current); | |
50 current->neuter(); | |
51 neuteredViews.append(current); | |
52 } | |
53 return true; | |
54 } | |
55 | |
56 void ArrayBuffer::addView(ArrayBufferView* view) | |
57 { | |
58 view->m_buffer = this; | |
59 view->m_prevView = 0; | |
60 view->m_nextView = m_firstView; | |
61 if (m_firstView) | |
62 m_firstView->m_prevView = view; | |
63 m_firstView = view; | |
64 } | |
65 | |
66 void ArrayBuffer::removeView(ArrayBufferView* view) | |
67 { | |
68 ASSERT(this == view->m_buffer); | |
69 if (view->m_nextView) | |
70 view->m_nextView->m_prevView = view->m_prevView; | |
71 if (view->m_prevView) | |
72 view->m_prevView->m_nextView = view->m_nextView; | |
73 if (m_firstView == view) | |
74 m_firstView = view->m_nextView; | |
75 view->m_prevView = view->m_nextView = 0; | |
76 } | |
77 | |
78 } | |
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