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/*
* Copyright (C) 2010 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 PageAllocationAligned_h
#define PageAllocationAligned_h
#include <wtf/OSAllocator.h>
#include <wtf/PageReservation.h>
namespace WTF {
class PageAllocationAligned : private PageBlock {
public:
PageAllocationAligned()
{
}
using PageBlock::operator bool;
using PageBlock::size;
using PageBlock::base;
WTF_EXPORT_PRIVATE static PageAllocationAligned allocate(size_t size, size_t alignment, OSAllocator::Usage usage = OSAllocator::UnknownUsage, bool writable = true);
WTF_EXPORT_PRIVATE void deallocate();
private:
#if OS(DARWIN)
PageAllocationAligned(void* base, size_t size)
: PageBlock(base, size, false)
{
}
#else
PageAllocationAligned(void* base, size_t size, void* reservationBase, size_t reservationSize)
: PageBlock(base, size, false)
, m_reservation(reservationBase, reservationSize, false)
{
}
PageBlock m_reservation;
#endif
};
} // namespace WTF
using WTF::PageAllocationAligned;
#endif // PageAllocationAligned_h
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