diff options
author | Simon Hausmann <simon.hausmann@nokia.com> | 2012-05-07 11:21:11 +0200 |
---|---|---|
committer | Simon Hausmann <simon.hausmann@nokia.com> | 2012-05-07 11:21:11 +0200 |
commit | 2cf6c8816a73e0132bd8fa3b509d62d7c51b6e47 (patch) | |
tree | 988e8c5b116dd0466244ae2fe5af8ee9be926d76 /Source/WTF/wtf/PageBlock.cpp | |
parent | dd91e772430dc294e3bf478c119ef8d43c0a3358 (diff) |
Imported WebKit commit 7e538425aa020340619e927792f3d895061fb54b (http://svn.webkit.org/repository/webkit/trunk@116286)
Diffstat (limited to 'Source/WTF/wtf/PageBlock.cpp')
-rw-r--r-- | Source/WTF/wtf/PageBlock.cpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Source/WTF/wtf/PageBlock.cpp b/Source/WTF/wtf/PageBlock.cpp new file mode 100644 index 000000000..8bbd7eb60 --- /dev/null +++ b/Source/WTF/wtf/PageBlock.cpp @@ -0,0 +1,78 @@ +/* + * 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. + */ + +#include "config.h" +#include "PageBlock.h" + +#if OS(UNIX) +#include <unistd.h> +#endif + +#if OS(WINDOWS) +#include <malloc.h> +#include <windows.h> +#endif + +namespace WTF { + +static size_t s_pageSize; +static size_t s_pageMask; + +#if OS(UNIX) + +inline size_t systemPageSize() +{ + return getpagesize(); +} + +#elif OS(WINDOWS) + +inline size_t systemPageSize() +{ + static size_t size = 0; + SYSTEM_INFO system_info; + GetSystemInfo(&system_info); + size = system_info.dwPageSize; + return size; +} + +#endif + +size_t pageSize() +{ + if (!s_pageSize) + s_pageSize = systemPageSize(); + ASSERT(isPowerOfTwo(s_pageSize)); + return s_pageSize; +} + +size_t pageMask() +{ + if (!s_pageMask) + s_pageMask = ~(pageSize() - 1); + return s_pageMask; +} + +} // namespace WTF |