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93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sw=4 et tw=99 ft=cpp:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Copyright (C) 2010 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "PageBlock.h"
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#include "wtf/Assertions.h"
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#if WTF_OS_UNIX && !WTF_OS_SYMBIAN
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#include <unistd.h>
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#endif
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#if WTF_OS_WINDOWS
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#include <malloc.h>
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#include <windows.h>
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#endif
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#if WTF_OS_SYMBIAN
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#include <e32hal.h>
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#include <e32std.h>
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#endif
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#if WTF_OS_OS2
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#include <stdlib.h>
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#endif
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namespace WTF {
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static size_t s_pageSize;
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#if (WTF_OS_UNIX && !WTF_OS_SYMBIAN) || WTF_OS_OS2
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inline size_t systemPageSize()
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{
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return getpagesize();
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}
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#elif WTF_OS_WINDOWS
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inline size_t systemPageSize()
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{
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static size_t size = 0;
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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size = system_info.dwPageSize;
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return size;
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}
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#elif WTF_OS_SYMBIAN
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inline size_t systemPageSize()
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{
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static TInt page_size = 0;
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UserHal::PageSizeInBytes(page_size);
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return page_size;
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}
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#endif
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size_t pageSize()
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{
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if (!s_pageSize)
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s_pageSize = systemPageSize();
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ASSERT(isPowerOfTwo(s_pageSize));
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return s_pageSize;
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}
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} // namespace WTF
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