OLD | NEW |
| (Empty) |
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 | |
OLD | NEW |