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) && !OS(SYMBIAN)
30 #include <unistd.h>
31 #endif
32
33 #if OS(WINDOWS)
34 #include <malloc.h>
35 #include <windows.h>
36 #endif
37
38 #if OS(SYMBIAN)
39 #include <e32hal.h>
40 #include <e32std.h>
41 #endif
42
43 namespace WTF {
44
45 static size_t s_pageSize;
46
47 #if OS(UNIX) && !OS(SYMBIAN)
48
systemPageSize()49 inline size_t systemPageSize()
50 {
51 return getpagesize();
52 }
53
54 #elif OS(WINDOWS)
55
systemPageSize()56 inline size_t systemPageSize()
57 {
58 static size_t size = 0;
59 SYSTEM_INFO system_info;
60 GetSystemInfo(&system_info);
61 size = system_info.dwPageSize;
62 return size;
63 }
64
65 #elif OS(SYMBIAN)
66
systemPageSize()67 inline size_t systemPageSize()
68 {
69 static TInt page_size = 0;
70 UserHal::PageSizeInBytes(page_size);
71 return page_size;
72 }
73
74 #endif
75
pageSize()76 size_t pageSize()
77 {
78 if (!s_pageSize)
79 s_pageSize = systemPageSize();
80 ASSERT(isPowerOfTwo(s_pageSize));
81 return s_pageSize;
82 }
83
84 } // namespace WTF
85