1 /* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * Copyright (C) 2013 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef ArrayBufferContents_h 28 #define ArrayBufferContents_h 29 30 #include "wtf/ArrayBufferDeallocationObserver.h" 31 #include "wtf/Noncopyable.h" 32 #include "wtf/PartitionAlloc.h" 33 #include "wtf/WTFExport.h" 34 35 namespace WTF { 36 37 class WTF_EXPORT ArrayBufferContents { 38 WTF_MAKE_NONCOPYABLE(ArrayBufferContents); 39 public: 40 enum InitializationPolicy { 41 ZeroInitialize, 42 DontInitialize 43 }; 44 45 ArrayBufferContents(); 46 ArrayBufferContents(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy); 47 48 // Use with care. data must be allocated with allocateMemory. 49 // ArrayBufferContents will take ownership of the data and free it (using freeMemorY) 50 // upon destruction. 51 ArrayBufferContents(void* data, unsigned sizeInBytes); 52 53 ~ArrayBufferContents(); 54 55 void clear(); 56 57 void* data() const { return m_data; } 58 unsigned sizeInBytes() const { return m_sizeInBytes; } 59 60 bool hasDeallocationObserver() const { return !!m_deallocationObserver; } 61 void setDeallocationObserver(ArrayBufferDeallocationObserver* observer) { m_deallocationObserver = observer; } 62 63 void transfer(ArrayBufferContents& other); 64 void copyTo(ArrayBufferContents& other); 65 66 static void allocateMemory(size_t, InitializationPolicy, void*&); 67 static void freeMemory(void*, size_t); 68 69 private: 70 void* m_data; 71 unsigned m_sizeInBytes; 72 ArrayBufferDeallocationObserver* m_deallocationObserver; 73 }; 74 75 } // namespace WTF 76 77 #endif // ArrayBufferContents_h 78