| 1 | /* |
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| 2 | * Copyright (C) 2010 Apple Inc. All rights reserved. |
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| 3 | * |
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| 4 | * Redistribution and use in source and binary forms, with or without |
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| 5 | * modification, are permitted provided that the following conditions |
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| 6 | * are met: |
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| 7 | * 1. Redistributions of source code must retain the above copyright |
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| 8 | * notice, this list of conditions and the following disclaimer. |
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer in the |
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| 11 | * documentation and/or other materials provided with the distribution. |
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| 12 | * |
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| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
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| 14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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| 15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
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| 17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
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| 23 | * THE POSSIBILITY OF SUCH DAMAGE. |
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| 24 | */ |
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| 25 | |
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| 26 | #ifndef PageAllocationAligned_h |
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| 27 | #define PageAllocationAligned_h |
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| 28 | |
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| 29 | #include <wtf/OSAllocator.h> |
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| 30 | #include <wtf/PageReservation.h> |
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| 31 | |
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| 32 | namespace WTF { |
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| 33 | |
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| 34 | class PageAllocationAligned : private PageBlock { |
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| 35 | public: |
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| 36 | PageAllocationAligned() |
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| 37 | { |
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| 38 | } |
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| 39 | |
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| 40 | using PageBlock::operator bool; |
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| 41 | using PageBlock::size; |
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| 42 | using PageBlock::base; |
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| 43 | |
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| 44 | static PageAllocationAligned allocate(size_t size, size_t alignment, OSAllocator::Usage usage = OSAllocator::UnknownUsage, bool writable = true); |
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| 45 | |
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| 46 | void deallocate(); |
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| 47 | |
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| 48 | private: |
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| 49 | #if OS(DARWIN) |
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| 50 | PageAllocationAligned(void* base, size_t size) |
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| 51 | : PageBlock(base, size, false) |
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| 52 | { |
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| 53 | } |
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| 54 | #else |
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| 55 | PageAllocationAligned(void* base, size_t size, void* reservationBase, size_t reservationSize) |
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| 56 | : PageBlock(base, size, false) |
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| 57 | , m_reservation(reservationBase, reservationSize, false) |
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| 58 | { |
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| 59 | } |
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| 60 | |
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| 61 | PageBlock m_reservation; |
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| 62 | #endif |
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| 63 | }; |
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| 64 | |
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| 65 | |
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| 66 | } // namespace WTF |
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| 67 | |
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| 68 | using WTF::PageAllocationAligned; |
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| 69 | |
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| 70 | #endif // PageAllocationAligned_h |
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| 71 | |
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