1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Netscape Portable Runtime (NSPR).
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998-2000
20 : * the Initial Developer. All Rights Reserved.
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22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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37 :
38 : #include "prbit.h"
39 : #include "prsystem.h"
40 :
41 : #ifdef XP_UNIX
42 : #include <unistd.h>
43 : #endif
44 : #ifdef SUNOS4
45 : #include "md/sunos4.h"
46 : #endif
47 : #ifdef _WIN32
48 : #include <windows.h>
49 : #endif
50 : #ifdef XP_BEOS
51 : #include <OS.h>
52 : #endif
53 :
54 : PRInt32 _pr_pageShift;
55 : PRInt32 _pr_pageSize;
56 :
57 : /*
58 : ** Get system page size
59 : */
60 20034 : static void GetPageSize(void)
61 : {
62 : PRInt32 pageSize;
63 :
64 : /* Get page size */
65 : #ifdef XP_UNIX
66 : #if defined SUNOS4 || defined BSDI || defined AIX \
67 : || defined LINUX || defined __GNU__ || defined __GLIBC__ \
68 : || defined FREEBSD || defined NETBSD || defined OPENBSD \
69 : || defined DARWIN || defined NEXTSTEP || defined SYMBIAN
70 20034 : _pr_pageSize = getpagesize();
71 : #elif defined(HPUX)
72 : /* I have no idea. Don't get me started. --Rob */
73 : _pr_pageSize = sysconf(_SC_PAGE_SIZE);
74 : #else
75 : _pr_pageSize = sysconf(_SC_PAGESIZE);
76 : #endif
77 : #endif /* XP_UNIX */
78 :
79 : #ifdef XP_BEOS
80 : _pr_pageSize = B_PAGE_SIZE;
81 : #endif
82 :
83 : #ifdef XP_PC
84 : #ifdef _WIN32
85 : SYSTEM_INFO info;
86 : GetSystemInfo(&info);
87 : _pr_pageSize = info.dwPageSize;
88 : #else
89 : _pr_pageSize = 4096;
90 : #endif
91 : #endif /* XP_PC */
92 :
93 20034 : pageSize = _pr_pageSize;
94 20034 : PR_CEILING_LOG2(_pr_pageShift, pageSize);
95 20034 : }
96 :
97 230 : PR_IMPLEMENT(PRInt32) PR_GetPageShift(void)
98 : {
99 230 : if (!_pr_pageSize) {
100 0 : GetPageSize();
101 : }
102 230 : return _pr_pageShift;
103 : }
104 :
105 20494 : PR_IMPLEMENT(PRInt32) PR_GetPageSize(void)
106 : {
107 20494 : if (!_pr_pageSize) {
108 20034 : GetPageSize();
109 : }
110 20494 : return _pr_pageSize;
111 : }
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