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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /*
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #include "prbit.h"
- #include "prsystem.h"
-
- #if defined(XP_MAC)
- #include "prosdep.h"
- #else
- #include "md/prosdep.h"
- #endif
-
- #ifdef XP_UNIX
- #include <unistd.h>
- #endif
-
- PRInt32 _pr_pageShift;
- PRInt32 _pr_pageSize;
-
- /*
- ** Get system page size
- */
- static void GetPageSize(void)
- {
- PRInt32 pageSize;
-
- /* Get page size */
- #ifdef XP_UNIX
- #if defined SUNOS4 || defined LINUX || defined BSDI || defined AIX \
- || defined FREEBSD
- _pr_pageSize = getpagesize();
- #elif defined(HPUX)
- /* I have no idea. Don't get me started. --Rob */
- _pr_pageSize = sysconf(_SC_PAGE_SIZE);
- #else
- _pr_pageSize = sysconf(_SC_PAGESIZE);
- #endif
- #endif /* XP_UNIX */
-
- #ifdef XP_MAC
- _pr_pageSize = 4096;
- #endif /* XP_MAC */
-
- #ifdef XP_PC
- #ifdef _WIN32
- SYSTEM_INFO info;
- GetSystemInfo(&info);
- _pr_pageSize = info.dwPageSize;
- #else
- _pr_pageSize = 4096;
- #endif
- #endif /* XP_PC */
-
- pageSize = _pr_pageSize;
- PR_CEILING_LOG2(_pr_pageShift, pageSize);
- }
-
- PR_IMPLEMENT(PRInt32) PR_GetPageShift(void)
- {
- if (!_pr_pageSize) {
- GetPageSize();
- }
- return _pr_pageShift;
- }
-
- PR_IMPLEMENT(PRInt32) PR_GetPageSize(void)
- {
- if (!_pr_pageSize) {
- GetPageSize();
- }
- return _pr_pageSize;
- }
-