| OLD | NEW |
| 1 /* | 1 /* |
| 2 * Copyright (C) 2009 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009 Apple Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| (...skipping 13 matching lines...) Expand all Loading... |
| 24 */ | 24 */ |
| 25 | 25 |
| 26 #include "config.h" | 26 #include "config.h" |
| 27 #include "wtf/ArrayBuffer.h" | 27 #include "wtf/ArrayBuffer.h" |
| 28 | 28 |
| 29 #include "wtf/ArrayBufferView.h" | 29 #include "wtf/ArrayBufferView.h" |
| 30 #include "wtf/RefPtr.h" | 30 #include "wtf/RefPtr.h" |
| 31 | 31 |
| 32 namespace WTF { | 32 namespace WTF { |
| 33 | 33 |
| 34 bool ArrayBuffer::transfer(ArrayBufferContents& result) | 34 bool ArrayBuffer::transfer(ArrayBufferContents& result) { |
| 35 { | 35 ASSERT(!isShared()); |
| 36 ASSERT(!isShared()); | 36 RefPtr<ArrayBuffer> keepAlive(this); |
| 37 RefPtr<ArrayBuffer> keepAlive(this); | |
| 38 | 37 |
| 39 if (!m_contents.data()) { | 38 if (!m_contents.data()) { |
| 40 result.neuter(); | 39 result.neuter(); |
| 41 return false; | 40 return false; |
| 42 } | 41 } |
| 43 | 42 |
| 44 bool allViewsAreNeuterable = true; | 43 bool allViewsAreNeuterable = true; |
| 45 for (ArrayBufferView* i = m_firstView; i; i = i->m_nextView) { | 44 for (ArrayBufferView* i = m_firstView; i; i = i->m_nextView) { |
| 46 if (!i->isNeuterable()) | 45 if (!i->isNeuterable()) |
| 47 allViewsAreNeuterable = false; | 46 allViewsAreNeuterable = false; |
| 48 } | 47 } |
| 49 | 48 |
| 50 if (allViewsAreNeuterable) { | 49 if (allViewsAreNeuterable) { |
| 51 m_contents.transfer(result); | 50 m_contents.transfer(result); |
| 52 } else { | 51 } else { |
| 53 m_contents.copyTo(result); | 52 m_contents.copyTo(result); |
| 54 if (!result.data()) | 53 if (!result.data()) |
| 55 return false; | 54 return false; |
| 56 } | 55 } |
| 57 | 56 |
| 58 while (m_firstView) { | 57 while (m_firstView) { |
| 59 ArrayBufferView* current = m_firstView; | 58 ArrayBufferView* current = m_firstView; |
| 60 removeView(current); | 59 removeView(current); |
| 61 if (allViewsAreNeuterable || current->isNeuterable()) | 60 if (allViewsAreNeuterable || current->isNeuterable()) |
| 62 current->neuter(); | 61 current->neuter(); |
| 63 } | 62 } |
| 64 | 63 |
| 65 m_isNeutered = true; | 64 m_isNeutered = true; |
| 66 | 65 |
| 67 return true; | 66 return true; |
| 68 } | 67 } |
| 69 | 68 |
| 70 bool ArrayBuffer::shareContentsWith(ArrayBufferContents& result) | 69 bool ArrayBuffer::shareContentsWith(ArrayBufferContents& result) { |
| 71 { | 70 ASSERT(isShared()); |
| 72 ASSERT(isShared()); | 71 RefPtr<ArrayBuffer> keepAlive(this); |
| 73 RefPtr<ArrayBuffer> keepAlive(this); | |
| 74 | 72 |
| 75 if (!m_contents.data()) { | 73 if (!m_contents.data()) { |
| 76 result.neuter(); | 74 result.neuter(); |
| 77 return false; | 75 return false; |
| 78 } | 76 } |
| 79 | 77 |
| 80 m_contents.shareWith(result); | 78 m_contents.shareWith(result); |
| 81 return true; | 79 return true; |
| 82 } | 80 } |
| 83 | 81 |
| 84 void ArrayBuffer::addView(ArrayBufferView* view) | 82 void ArrayBuffer::addView(ArrayBufferView* view) { |
| 85 { | 83 view->m_buffer = this; |
| 86 view->m_buffer = this; | 84 view->m_prevView = 0; |
| 87 view->m_prevView = 0; | 85 view->m_nextView = m_firstView; |
| 88 view->m_nextView = m_firstView; | 86 if (m_firstView) |
| 89 if (m_firstView) | 87 m_firstView->m_prevView = view; |
| 90 m_firstView->m_prevView = view; | 88 m_firstView = view; |
| 91 m_firstView = view; | |
| 92 } | 89 } |
| 93 | 90 |
| 94 void ArrayBuffer::removeView(ArrayBufferView* view) | 91 void ArrayBuffer::removeView(ArrayBufferView* view) { |
| 95 { | 92 ASSERT(this == view->m_buffer); |
| 96 ASSERT(this == view->m_buffer); | 93 if (view->m_nextView) |
| 97 if (view->m_nextView) | 94 view->m_nextView->m_prevView = view->m_prevView; |
| 98 view->m_nextView->m_prevView = view->m_prevView; | 95 if (view->m_prevView) |
| 99 if (view->m_prevView) | 96 view->m_prevView->m_nextView = view->m_nextView; |
| 100 view->m_prevView->m_nextView = view->m_nextView; | 97 if (m_firstView == view) |
| 101 if (m_firstView == view) | 98 m_firstView = view->m_nextView; |
| 102 m_firstView = view->m_nextView; | 99 view->m_prevView = view->m_nextView = 0; |
| 103 view->m_prevView = view->m_nextView = 0; | |
| 104 } | 100 } |
| 105 | |
| 106 } | 101 } |
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