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michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  *
michael@0:  * ***** BEGIN LICENSE BLOCK *****
michael@0:  * Copyright (C) 2010 Apple Inc. All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
michael@0:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
michael@0:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
michael@0:  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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michael@0:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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michael@0:  * THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  *
michael@0:  * ***** END LICENSE BLOCK ***** */
michael@0: 
michael@0: #include "yarr/PageBlock.h"
michael@0: #include "assembler/wtf/Assertions.h"
michael@0: 
michael@0: #if WTF_OS_UNIX && !WTF_OS_SYMBIAN
michael@0: #include <unistd.h>
michael@0: #endif
michael@0: 
michael@0: #if WTF_OS_WINDOWS
michael@0: #include <malloc.h>
michael@0: #include <windows.h>
michael@0: #endif
michael@0: 
michael@0: #if WTF_OS_SYMBIAN
michael@0: #include <e32hal.h>
michael@0: #include <e32std.h>
michael@0: #endif
michael@0: 
michael@0: #if WTF_OS_OS2
michael@0: #include <stdlib.h>
michael@0: #endif
michael@0: 
michael@0: namespace WTF {
michael@0: 
michael@0: static size_t s_pageSize;
michael@0: 
michael@0: #if (WTF_OS_UNIX && !WTF_OS_SYMBIAN) || WTF_OS_OS2
michael@0: 
michael@0: inline size_t systemPageSize()
michael@0: {
michael@0:     return getpagesize();
michael@0: }
michael@0: 
michael@0: #elif WTF_OS_WINDOWS
michael@0: 
michael@0: inline size_t systemPageSize()
michael@0: {
michael@0:     static size_t size = 0;
michael@0:     SYSTEM_INFO system_info;
michael@0:     GetSystemInfo(&system_info);
michael@0:     size = system_info.dwPageSize;
michael@0:     return size;
michael@0: }
michael@0: 
michael@0: #elif WTF_OS_SYMBIAN
michael@0: 
michael@0: inline size_t systemPageSize()
michael@0: {
michael@0:     static TInt page_size = 0;
michael@0:     UserHal::PageSizeInBytes(page_size);
michael@0:     return page_size;
michael@0: }
michael@0: 
michael@0: #endif
michael@0: 
michael@0: size_t pageSize()
michael@0: {
michael@0:     if (!s_pageSize)
michael@0:         s_pageSize = systemPageSize();
michael@0:     ASSERT(isPowerOfTwo(s_pageSize));
michael@0:     return s_pageSize;
michael@0: }
michael@0: 
michael@0: } // namespace WTF