/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "wtf/ArrayBuffer.h"
#include "wtf/ArrayBufferView.h"
#include "wtf/RefPtr.h"
namespace WTF {
bool ArrayBuffer::transfer(ArrayBufferContents& result)
{
RefPtr<ArrayBuffer> keepAlive(this);
if (!m_contents.data()) {
result.clear();
return false;
}
bool allViewsAreNeuterable = true;
for (ArrayBufferView* i = m_firstView; i; i = i->m_nextView) {
if (!i->isNeuterable())
allViewsAreNeuterable = false;
}
if (allViewsAreNeuterable) {
m_contents.transfer(result);
} else {
m_contents.copyTo(result);
if (!result.data())
return false;
}
while (m_firstView) {
ArrayBufferView* current = m_firstView;
removeView(current);
if (allViewsAreNeuterable || current->isNeuterable())
current->neuter();
}
m_isNeutered = true;
return true;
}
void ArrayBuffer::addView(ArrayBufferView* view)
{
view->m_buffer = this;
view->m_prevView = 0;
view->m_nextView = m_firstView;
if (m_firstView)
m_firstView->m_prevView = view;
m_firstView = view;
}
void ArrayBuffer::removeView(ArrayBufferView* view)
{
ASSERT(this == view->m_buffer);
if (view->m_nextView)
view->m_nextView->m_prevView = view->m_prevView;
if (view->m_prevView)
view->m_prevView->m_nextView = view->m_nextView;
if (m_firstView == view)
m_firstView = view->m_nextView;
view->m_prevView = view->m_nextView = 0;
}
}