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