Simplify OSAllocator.

Source/wtf/PageAllocationAligned.h

-/*
- * 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;
-
-    static PageAllocationAligned allocate(size_t size, size_t alignment, OSAllocator::Usage usage = OSAllocator::UnknownUsage, bool writable = true);
-
-    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