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
43namespace WTF {
44
45static size_t s_pageSize;
46
47#if OS(UNIX) && !OS(SYMBIAN)
48
49inline size_t systemPageSize()
50{
51    return getpagesize();
52}
53
54#elif OS(WINDOWS)
55
56inline 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
67inline size_t systemPageSize()
68{
69    static TInt page_size = 0;
70    UserHal::PageSizeInBytes(page_size);
71    return page_size;
72}
73
74#endif
75
76size_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