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 "wtf/ArrayBuffer.h" 28 29#include "wtf/ArrayBufferView.h" 30#include "wtf/RefPtr.h" 31 32namespace WTF { 33 34bool ArrayBuffer::transfer(ArrayBufferContents& result) 35{ 36 RefPtr<ArrayBuffer> keepAlive(this); 37 38 if (!m_contents.data()) { 39 result.clear(); 40 return false; 41 } 42 43 bool allViewsAreNeuterable = true; 44 for (ArrayBufferView* i = m_firstView; i; i = i->m_nextView) { 45 if (!i->isNeuterable()) 46 allViewsAreNeuterable = false; 47 } 48 49 if (allViewsAreNeuterable) { 50 m_contents.transfer(result); 51 } else { 52 m_contents.copyTo(result); 53 if (!result.data()) 54 return false; 55 } 56 57 while (m_firstView) { 58 ArrayBufferView* current = m_firstView; 59 removeView(current); 60 if (allViewsAreNeuterable || current->isNeuterable()) 61 current->neuter(); 62 } 63 64 m_isNeutered = true; 65 66 return true; 67} 68 69void ArrayBuffer::addView(ArrayBufferView* view) 70{ 71 view->m_buffer = this; 72 view->m_prevView = 0; 73 view->m_nextView = m_firstView; 74 if (m_firstView) 75 m_firstView->m_prevView = view; 76 m_firstView = view; 77} 78 79void ArrayBuffer::removeView(ArrayBufferView* view) 80{ 81 ASSERT(this == view->m_buffer); 82 if (view->m_nextView) 83 view->m_nextView->m_prevView = view->m_prevView; 84 if (view->m_prevView) 85 view->m_prevView->m_nextView = view->m_nextView; 86 if (m_firstView == view) 87 m_firstView = view->m_nextView; 88 view->m_prevView = view->m_nextView = 0; 89} 90 91} 92