/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
* Copyright (C) 2013 Google 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.
*/
#ifndef ArrayBufferContents_h
#define ArrayBufferContents_h
#include "wtf/ArrayBufferDeallocationObserver.h"
#include "wtf/Noncopyable.h"
#include "wtf/WTFExport.h"
namespace WTF {
class WTF_EXPORT ArrayBufferContents {
WTF_MAKE_NONCOPYABLE(ArrayBufferContents);
public:
enum InitializationPolicy {
ZeroInitialize,
DontInitialize
};
ArrayBufferContents();
ArrayBufferContents(unsigned numElements, unsigned elementByteSize, ArrayBufferContents::InitializationPolicy);
// Use with care. data must be allocated with allocateMemory.
// ArrayBufferContents will take ownership of the data and free it (using freeMemorY)
// upon destruction.
// This constructor will not call observer->StartObserving(), so it is a responsibility
// of the caller to make sure JS knows about external memory.
ArrayBufferContents(void* data, unsigned sizeInBytes, ArrayBufferDeallocationObserver*);
~ArrayBufferContents();
void clear();
void* data() const { return m_data; }
unsigned sizeInBytes() const { return m_sizeInBytes; }
void setDeallocationObserver(ArrayBufferDeallocationObserver* observer)
{
if (!m_deallocationObserver) {
m_deallocationObserver = observer;
m_deallocationObserver->blinkAllocatedMemory(m_sizeInBytes);
}
}
void transfer(ArrayBufferContents& other);
void copyTo(ArrayBufferContents& other);
static void allocateMemory(size_t, InitializationPolicy, void*&);
static void freeMemory(void*, size_t);
private:
void* m_data;
unsigned m_sizeInBytes;
ArrayBufferDeallocationObserver* m_deallocationObserver;
};
} // namespace WTF
#endif // ArrayBufferContents_h