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| 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 #include "config.h" | |
| 27 #include "PageBlock.h" | |
| 28 | |
| 29 #if OS(UNIX) | |
| 30 #include <unistd.h> | |
| 31 #endif | |
| 32 | |
| 33 #if OS(WINDOWS) | |
| 34 #include <malloc.h> | |
| 35 #include <windows.h> | |
| 36 #endif | |
| 37 | |
| 38 namespace WTF { | |
| 39 | |
| 40 static size_t s_pageSize; | |
| 41 static size_t s_pageMask; | |
| 42 | |
| 43 #if OS(UNIX) | |
| 44 | |
| 45 inline size_t systemPageSize() | |
| 46 { | |
| 47 return getpagesize(); | |
| 48 } | |
| 49 | |
| 50 #elif OS(WINDOWS) | |
| 51 | |
| 52 inline size_t systemPageSize() | |
| 53 { | |
| 54 static size_t size = 0; | |
| 55 SYSTEM_INFO system_info; | |
| 56 GetSystemInfo(&system_info); | |
| 57 size = system_info.dwPageSize; | |
| 58 return size; | |
| 59 } | |
| 60 | |
| 61 #endif | |
| 62 | |
| 63 size_t pageSize() | |
| 64 { | |
| 65 if (!s_pageSize) | |
| 66 s_pageSize = systemPageSize(); | |
| 67 ASSERT(isPowerOfTwo(s_pageSize)); | |
| 68 return s_pageSize; | |
| 69 } | |
| 70 | |
| 71 size_t pageMask() | |
| 72 { | |
| 73 if (!s_pageMask) | |
| 74 s_pageMask = ~(pageSize() - 1); | |
| 75 return s_pageMask; | |
| 76 } | |
| 77 | |
| 78 } // namespace WTF | |
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Chromium Code Reviews
Issue 14238015:
Move Source/WTF/wtf to Source/wtf (Closed)
Base URL: svn://svn.chromium.org/blink/trunk