andre@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
andre@0: /* This Source Code Form is subject to the terms of the Mozilla Public
andre@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
andre@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
andre@0: 
andre@0: #include "prbit.h"
andre@0: #include "prsystem.h"
andre@0: 
andre@0: #ifdef XP_UNIX
andre@0: #include <unistd.h>
andre@0: #endif
andre@0: #ifdef _WIN32
andre@0: #include <windows.h>
andre@0: #endif 
andre@0: #ifdef XP_BEOS
andre@0: #include <OS.h>
andre@0: #endif
andre@0: 
andre@0: PRInt32 _pr_pageShift;
andre@0: PRInt32 _pr_pageSize;
andre@0: 
andre@0: /*
andre@0: ** Get system page size
andre@0: */
andre@0: static void GetPageSize(void)
andre@0: {
andre@0: 	PRInt32 pageSize;
andre@0: 
andre@0:     /* Get page size */
andre@0: #ifdef XP_UNIX
andre@0: #if defined BSDI || defined AIX \
andre@0:         || defined LINUX || defined __GNU__ || defined __GLIBC__ \
andre@0:         || defined FREEBSD || defined NETBSD || defined OPENBSD \
andre@0:         || defined DARWIN || defined SYMBIAN
andre@0:     _pr_pageSize = getpagesize();
andre@0: #elif defined(HPUX)
andre@0:     /* I have no idea. Don't get me started. --Rob */
andre@0:     _pr_pageSize = sysconf(_SC_PAGE_SIZE);
andre@0: #else
andre@0:     _pr_pageSize = sysconf(_SC_PAGESIZE);
andre@0: #endif
andre@0: #endif /* XP_UNIX */
andre@0: 
andre@0: #ifdef XP_BEOS
andre@0:     _pr_pageSize = B_PAGE_SIZE;
andre@0: #endif
andre@0: 
andre@0: #ifdef XP_PC
andre@0: #ifdef _WIN32
andre@0:     SYSTEM_INFO info;
andre@0:     GetSystemInfo(&info);
andre@0:     _pr_pageSize = info.dwPageSize;
andre@0: #else
andre@0:     _pr_pageSize = 4096;
andre@0: #endif
andre@0: #endif /* XP_PC */
andre@0: 
andre@0: 	pageSize = _pr_pageSize;
andre@0: 	PR_CEILING_LOG2(_pr_pageShift, pageSize);
andre@0: }
andre@0: 
andre@0: PR_IMPLEMENT(PRInt32) PR_GetPageShift(void)
andre@0: {
andre@0:     if (!_pr_pageSize) {
andre@0: 	GetPageSize();
andre@0:     }
andre@0:     return _pr_pageShift;
andre@0: }
andre@0: 
andre@0: PR_IMPLEMENT(PRInt32) PR_GetPageSize(void)
andre@0: {
andre@0:     if (!_pr_pageSize) {
andre@0: 	GetPageSize();
andre@0:     }
andre@0:     return _pr_pageSize;
andre@0: }