1/*
2 * Copyright (C) 2009, 2013 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#include "config.h"
27#include "ArrayBuffer.h"
28
29#include "ArrayBufferNeuteringWatchpoint.h"
30#include "JSArrayBufferView.h"
31#include "JSCInlines.h"
32#include <wtf/RefPtr.h>
33
34namespace JSC {
35
36bool ArrayBuffer::transfer(ArrayBufferContents& result)
37{
38    Ref<ArrayBuffer> protect(*this);
39
40    if (!m_contents.m_data) {
41        result.m_data = 0;
42        return false;
43    }
44
45    bool isNeuterable = !m_pinCount;
46
47    if (isNeuterable)
48        m_contents.transfer(result);
49    else {
50        m_contents.copyTo(result);
51        if (!result.m_data)
52            return false;
53    }
54
55    for (size_t i = numberOfIncomingReferences(); i--;) {
56        JSCell* cell = incomingReferenceAt(i);
57        if (JSArrayBufferView* view = jsDynamicCast<JSArrayBufferView*>(cell))
58            view->neuter();
59        else if (ArrayBufferNeuteringWatchpoint* watchpoint = jsDynamicCast<ArrayBufferNeuteringWatchpoint*>(cell))
60            watchpoint->set()->fireAll();
61    }
62    return true;
63}
64
65} // namespace JSC
66
67