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/*
* Copyright (C) 2009 Apple 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.
*/
#include "config.h"
#if ENABLE(3D_CANVAS)
#include "ArrayBuffer.h"
#include <wtf/RefPtr.h>
namespace WebCore {
PassRefPtr<ArrayBuffer> ArrayBuffer::create(unsigned numElements, unsigned elementByteSize)
{
void* data = tryAllocate(numElements, elementByteSize);
if (!data)
return 0;
return adoptRef(new ArrayBuffer(data, numElements * elementByteSize));
}
PassRefPtr<ArrayBuffer> ArrayBuffer::create(ArrayBuffer* other)
{
void* data = tryAllocate(other->byteLength(), 1);
if (!data)
return 0;
RefPtr<ArrayBuffer> buffer = adoptRef(new ArrayBuffer(data, other->byteLength()));
memcpy(buffer->data(), other->data(), other->byteLength());
return buffer.release();
}
ArrayBuffer::ArrayBuffer(void* data, unsigned sizeInBytes)
: m_sizeInBytes(sizeInBytes)
, m_data(data) {
}
void* ArrayBuffer::data() {
return m_data;
}
const void* ArrayBuffer::data() const {
return m_data;
}
unsigned ArrayBuffer::byteLength() const {
return m_sizeInBytes;
}
ArrayBuffer::~ArrayBuffer() {
WTF::fastFree(m_data);
}
void* ArrayBuffer::tryAllocate(unsigned numElements, unsigned elementByteSize) {
void* result;
// Do not allow 32-bit overflow of the total size
if (numElements) {
unsigned totalSize = numElements * elementByteSize;
if (totalSize / numElements != elementByteSize)
return 0;
}
if (WTF::tryFastCalloc(numElements, elementByteSize).getValue(result))
return result;
return 0;
}
}
#endif // ENABLE(3D_CANVAS)
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