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86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
/*
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* Copyright (C) 2009 Apple Inc. All rights reserved.
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_WTF_ARRAYBUFFERCONTENTS_H_
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#define SKY_ENGINE_WTF_ARRAYBUFFERCONTENTS_H_
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#include <cstddef>
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#include "sky/engine/wtf/ArrayBufferDeallocationObserver.h"
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#include "sky/engine/wtf/Noncopyable.h"
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#include "sky/engine/wtf/WTFExport.h"
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namespace WTF {
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class WTF_EXPORT ArrayBufferContents {
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WTF_MAKE_NONCOPYABLE(ArrayBufferContents);
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public:
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enum InitializationPolicy {
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ZeroInitialize,
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DontInitialize
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};
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ArrayBufferContents();
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ArrayBufferContents(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
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// Use with care. data must be allocated with allocateMemory.
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// ArrayBufferContents will take ownership of the data and free it (using freeMemorY)
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// upon destruction.
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// This constructor will not call observer->StartObserving(), so it is a responsibility
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// of the caller to make sure JS knows about external memory.
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ArrayBufferContents(void* data, unsigned sizeInBytes, ArrayBufferDeallocationObserver*);
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~ArrayBufferContents();
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void clear();
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void* data() const { return m_data; }
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unsigned sizeInBytes() const { return m_sizeInBytes; }
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void setDeallocationObserver(ArrayBufferDeallocationObserver* observer)
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{
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if (!m_deallocationObserver) {
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m_deallocationObserver = observer;
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m_deallocationObserver->blinkAllocatedMemory(m_sizeInBytes);
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}
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}
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void transfer(ArrayBufferContents& other);
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void copyTo(ArrayBufferContents& other);
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static void allocateMemory(size_t, InitializationPolicy, void*&);
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static void freeMemory(void*, size_t);
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private:
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void* m_data;
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unsigned m_sizeInBytes;
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ArrayBufferDeallocationObserver* m_deallocationObserver;
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};
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} // namespace WTF
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#endif // SKY_ENGINE_WTF_ARRAYBUFFERCONTENTS_H_
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