70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "prbit.h"
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#include "prsystem.h"
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#ifdef XP_UNIX
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#include <unistd.h>
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#endif
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#ifdef _WIN32
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#include <windows.h>
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#endif
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PRInt32 _pr_pageShift;
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PRInt32 _pr_pageSize;
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/*
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** Get system page size
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*/
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static void GetPageSize(void)
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{
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PRInt32 pageSize;
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/* Get page size */
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#ifdef XP_UNIX
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#if defined BSDI || defined AIX \
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|| defined LINUX || defined __GNU__ || defined __GLIBC__ \
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|| defined FREEBSD || defined NETBSD || defined OPENBSD \
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|| defined DARWIN
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_pr_pageSize = getpagesize();
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#elif defined(HPUX)
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/* I have no idea. Don't get me started. --Rob */
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_pr_pageSize = sysconf(_SC_PAGE_SIZE);
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#else
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_pr_pageSize = sysconf(_SC_PAGESIZE);
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#endif
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#endif /* XP_UNIX */
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#ifdef XP_PC
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#ifdef _WIN32
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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_pr_pageSize = info.dwPageSize;
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#else
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_pr_pageSize = 4096;
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#endif
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#endif /* XP_PC */
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pageSize = _pr_pageSize;
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PR_CEILING_LOG2(_pr_pageShift, pageSize);
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}
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PR_IMPLEMENT(PRInt32) PR_GetPageShift(void)
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{
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if (!_pr_pageSize) {
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GetPageSize();
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}
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return _pr_pageShift;
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}
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PR_IMPLEMENT(PRInt32) PR_GetPageSize(void)
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{
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if (!_pr_pageSize) {
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GetPageSize();
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}
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return _pr_pageSize;
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}
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