nspr-4.8.6/mozilla/nsprpub/pr/src/misc/prsystem.c - nest-learning-thermostat/5.1.3/nspr - Git at Google

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  * for the specific language governing rights and limitations under the
  * License.
  *
  * The Original Code is the Netscape Portable Runtime (NSPR).
  *
  * The Initial Developer of the Original Code is
  * Netscape Communications Corporation.
  * Portions created by the Initial Developer are Copyright (C) 1998-2000
  * the Initial Developer. All Rights Reserved.
  *
  * Contributor(s):
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either the GNU General Public License Version 2 or later (the "GPL"), or
  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  * in which case the provisions of the GPL or the LGPL are applicable instead
  * of those above. If you wish to allow use of your version of this file only
  * under the terms of either the GPL or the LGPL, and not to allow others to
  * use your version of this file under the terms of the MPL, indicate your
  * decision by deleting the provisions above and replace them with the notice
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */

 #include "primpl.h"
 #include "prsystem.h"
 #include "prprf.h"
 #include "prlong.h"

 #if defined(BEOS)
 #include <kernel/OS.h>
 #endif

 #if defined(OS2)
 #define INCL_DOS
 #define INCL_DOSMISC
 #include <os2.h>
 /* define the required constant if it is not already defined in the headers */
 #ifndef QSV_NUMPROCESSORS
 #define QSV_NUMPROCESSORS 26
 #endif
 #endif

 /* BSD-derived systems use sysctl() to get the number of processors */
 #if defined(BSDI) || defined(FREEBSD) || defined(NETBSD) \
     || defined(OPENBSD) || defined(DARWIN)
 #define _PR_HAVE_SYSCTL
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #endif

 #if defined(DARWIN)
 #include <mach/mach_init.h>
 #include <mach/mach_host.h>
 #endif

 #if defined(HPUX)
 #include <sys/mpctl.h>
 #include <sys/pstat.h>
 #endif

 #if defined(XP_UNIX)
 #include <unistd.h>
 #include <sys/utsname.h>
 #endif

 #if defined(AIX)
 #include <cf.h>
 #include <sys/cfgodm.h>
 #endif

 #if defined(WIN32)
 /* This struct is not present in VC6 headers, so declare it here */
 typedef struct {
     DWORD dwLength;
     DWORD dwMemoryLoad;
     DWORDLONG ullTotalPhys;
     DWORDLONG ullAvailPhys;
     DWORDLONG ullToalPageFile;
     DWORDLONG ullAvailPageFile;
     DWORDLONG ullTotalVirtual;
     DWORDLONG ullAvailVirtual;
     DWORDLONG ullAvailExtendedVirtual;
 } PR_MEMORYSTATUSEX;

 /* Typedef for dynamic lookup of GlobalMemoryStatusEx(). */
 typedef BOOL (WINAPI *GlobalMemoryStatusExFn)(PR_MEMORYSTATUSEX *);
 #endif

 PR_IMPLEMENT(char) PR_GetDirectorySeparator(void)
 {
     return PR_DIRECTORY_SEPARATOR;
 }  /* PR_GetDirectorySeparator */

 /*
 ** OBSOLETE -- the function name is misspelled.
 */
 PR_IMPLEMENT(char) PR_GetDirectorySepartor(void)
 {
 #if defined(DEBUG)
     static PRBool warn = PR_TRUE;
     if (warn) {
         warn = _PR_Obsolete("PR_GetDirectorySepartor()",
                 "PR_GetDirectorySeparator()");
     }
 #endif
     return PR_GetDirectorySeparator();
 }  /* PR_GetDirectorySepartor */

 PR_IMPLEMENT(char) PR_GetPathSeparator(void)
 {
     return PR_PATH_SEPARATOR;
 }  /* PR_GetPathSeparator */

 PR_IMPLEMENT(PRStatus) PR_GetSystemInfo(PRSysInfo cmd, char *buf, PRUint32 buflen)
 {
     PRUintn len = 0;

     if (!_pr_initialized) _PR_ImplicitInitialization();

     switch(cmd)
     {
       case PR_SI_HOSTNAME:
       case PR_SI_HOSTNAME_UNTRUNCATED:
         if (PR_FAILURE == _PR_MD_GETHOSTNAME(buf, (PRUintn)buflen))
             return PR_FAILURE;

         if (cmd == PR_SI_HOSTNAME_UNTRUNCATED)
             break;
         /*
          * On some platforms a system does not have a hostname and
          * its IP address is returned instead.   The following code
          * should be skipped on those platforms.
          */
 #ifndef _PR_GET_HOST_ADDR_AS_NAME
         /* Return the unqualified hostname */
             while (buf[len] && (len < buflen)) {
                 if (buf[len] == '.') {
                     buf[len] = '\0';
                     break;
                 }
                 len += 1;
             }
 #endif
          break;

       case PR_SI_SYSNAME:
         /* Return the operating system name */
 #if defined(XP_UNIX) || defined(WIN32)
         if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen))
             return PR_FAILURE;
 #else
         (void)PR_snprintf(buf, buflen, _PR_SI_SYSNAME);
 #endif
         break;

       case PR_SI_RELEASE:
         /* Return the version of the operating system */
 #if defined(XP_UNIX) || defined(WIN32)
         if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen))
             return PR_FAILURE;
 #endif
 #if defined(XP_OS2)
         {
             ULONG os2ver[2] = {0};
             DosQuerySysInfo(QSV_VERSION_MINOR, QSV_VERSION_REVISION,
                             &os2ver, sizeof(os2ver));
             /* Formatting for normal usage (2.11, 3.0, 4.0, 4.5); officially,
                Warp 4 is version 2.40.00, WSeB 2.45.00 */
             if (os2ver[0] < 30)
               (void)PR_snprintf(buf, buflen, "%s%lu",
                                 "2.", os2ver[0]);
             else if (os2ver[0] < 45)
               (void)PR_snprintf(buf, buflen, "%lu%s%lu",
                                 os2ver[0]/10, ".", os2ver[1]);
             else
               (void)PR_snprintf(buf, buflen, "%.1f",
                                 os2ver[0]/10.0);
         }
 #endif /* OS2 */
         break;

       case PR_SI_ARCHITECTURE:
         /* Return the architecture of the machine (ie. x86, mips, alpha, ...)*/
         (void)PR_snprintf(buf, buflen, _PR_SI_ARCHITECTURE);
         break;
 	  default:
 			PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
 			return PR_FAILURE;
     }
     return PR_SUCCESS;
 }

 /*
 ** PR_GetNumberOfProcessors()
 **
 ** Implementation notes:
 **   Every platform does it a bit different.
 **     numCpus is the returned value.
 **   for each platform's "if defined" section
 **     declare your local variable
 **     do your thing, assign to numCpus
 **   order of the if defined()s may be important,
 **     especially for unix variants. Do platform
 **     specific implementations before XP_UNIX.
 **
 */
 PR_IMPLEMENT(PRInt32) PR_GetNumberOfProcessors( void )
 {
     PRInt32     numCpus;
 #if defined(WIN32)
     SYSTEM_INFO     info;

     GetSystemInfo( &info );
     numCpus = info.dwNumberOfProcessors;
 #elif defined(BEOS)
     system_info sysInfo;

     get_system_info(&sysInfo);
     numCpus = sysInfo.cpu_count;
 #elif defined(OS2)
     DosQuerySysInfo( QSV_NUMPROCESSORS, QSV_NUMPROCESSORS, &numCpus, sizeof(numCpus));
 #elif defined(_PR_HAVE_SYSCTL)
     int mib[2];
     int rc;
     size_t len = sizeof(numCpus);

     mib[0] = CTL_HW;
     mib[1] = HW_NCPU;
     rc = sysctl( mib, 2, &numCpus, &len, NULL, 0 );
     if ( -1 == rc )  {
         numCpus = -1; /* set to -1 for return value on error */
         _PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
     }
 #elif defined(HPUX)
     numCpus = mpctl( MPC_GETNUMSPUS, 0, 0 );
     if ( numCpus < 1 )  {
         numCpus = -1; /* set to -1 for return value on error */
         _PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
     }
 #elif defined(IRIX)
     numCpus = sysconf( _SC_NPROC_ONLN );
 #elif defined(RISCOS) || defined(SYMBIAN)
     numCpus = 1;
 #elif defined(XP_UNIX)
     numCpus = sysconf( _SC_NPROCESSORS_ONLN );
 #else
 #error "An implementation is required"
 #endif
     return(numCpus);
 } /* end PR_GetNumberOfProcessors() */

 /*
 ** PR_GetPhysicalMemorySize()
 **
 ** Implementation notes:
 **   Every platform does it a bit different.
 **     bytes is the returned value.
 **   for each platform's "if defined" section
 **     declare your local variable
 **     do your thing, assign to bytes.
 **
 */
 PR_IMPLEMENT(PRUint64) PR_GetPhysicalMemorySize(void)
 {
     PRUint64 bytes = 0;

 #if defined(LINUX) || defined(SOLARIS)

     long pageSize = sysconf(_SC_PAGESIZE);
     long pageCount = sysconf(_SC_PHYS_PAGES);
     bytes = (PRUint64) pageSize * pageCount;

 #elif defined(NETBSD)

     int mib[2];
     int rc;
     uint64_t memSize;
     size_t len = sizeof(memSize);

     mib[0] = CTL_HW;
     mib[1] = HW_PHYSMEM64;
     rc = sysctl(mib, 2, &memSize, &len, NULL, 0);
     if (-1 != rc)  {
         bytes = memSize;
     }

 #elif defined(HPUX)

     struct pst_static info;
     int result = pstat_getstatic(&info, sizeof(info), 1, 0);
     if (result == 1)
         bytes = (PRUint64) info.physical_memory * info.page_size;

 #elif defined(DARWIN)

     struct host_basic_info hInfo;
     mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;

     int result = host_info(mach_host_self(),
                            HOST_BASIC_INFO,
                            (host_info_t) &hInfo,
                            &count);
     if (result == KERN_SUCCESS)
         bytes = hInfo.max_mem;

 #elif defined(WIN32)

     /* Try to use the newer GlobalMemoryStatusEx API for Windows 2000+. */
     GlobalMemoryStatusExFn globalMemory = (GlobalMemoryStatusExFn) NULL;
     HMODULE module = GetModuleHandleW(L"kernel32.dll");

     if (module) {
         globalMemory = (GlobalMemoryStatusExFn)GetProcAddress(module, "GlobalMemoryStatusEx");

         if (globalMemory) {
             PR_MEMORYSTATUSEX memStat;
             memStat.dwLength = sizeof(memStat);

             if (globalMemory(&memStat))
                 bytes = memStat.ullTotalPhys;
         }
     }

     if (!bytes) {
         /* Fall back to the older API. */
         MEMORYSTATUS memStat;
         memset(&memStat, 0, sizeof(memStat));
         GlobalMemoryStatus(&memStat);
         bytes = memStat.dwTotalPhys;
     }

 #elif defined(OS2)

     ULONG ulPhysMem;
     DosQuerySysInfo(QSV_TOTPHYSMEM,
                     QSV_TOTPHYSMEM,
                     &ulPhysMem,
                     sizeof(ulPhysMem));
     bytes = ulPhysMem;

 #elif defined(AIX)

     if (odm_initialize() == 0) {
         int how_many;
         struct CuAt *obj = getattr("sys0", "realmem", 0, &how_many);
         if (obj != NULL) {
             bytes = (PRUint64) atoi(obj->value) * 1024;
             free(obj);
         }
         odm_terminate();
     }

 #else

     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

 #endif

     return bytes;
 } /* end PR_GetPhysicalMemorySize() */
	/* -- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -- */
	/* *** BEGIN LICENSE BLOCK ***
	* Version: MPL 1.1/GPL 2.0/LGPL 2.1
	*
	* The contents of this file are subject to the Mozilla Public License Version
	* 1.1 (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	* http://www.mozilla.org/MPL/
	*
	* Software distributed under the License is distributed on an "AS IS" basis,
	* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
	* for the specific language governing rights and limitations under the
	* License.
	*
	* The Original Code is the Netscape Portable Runtime (NSPR).
	*
	* The Initial Developer of the Original Code is
	* Netscape Communications Corporation.
	* Portions created by the Initial Developer are Copyright (C) 1998-2000
	* the Initial Developer. All Rights Reserved.
	*
	* Contributor(s):
	*
	* Alternatively, the contents of this file may be used under the terms of
	* either the GNU General Public License Version 2 or later (the "GPL"), or
	* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
	* in which case the provisions of the GPL or the LGPL are applicable instead
	* of those above. If you wish to allow use of your version of this file only
	* under the terms of either the GPL or the LGPL, and not to allow others to
	* use your version of this file under the terms of the MPL, indicate your
	* decision by deleting the provisions above and replace them with the notice
	* and other provisions required by the GPL or the LGPL. If you do not delete
	* the provisions above, a recipient may use your version of this file under
	* the terms of any one of the MPL, the GPL or the LGPL.
	*
	* *** END LICENSE BLOCK *** */

	#include "primpl.h"
	#include "prsystem.h"
	#include "prprf.h"
	#include "prlong.h"

	#if defined(BEOS)
	#include <kernel/OS.h>
	#endif

	#if defined(OS2)
	#define INCL_DOS
	#define INCL_DOSMISC
	#include <os2.h>
	/* define the required constant if it is not already defined in the headers */
	#ifndef QSV_NUMPROCESSORS
	#define QSV_NUMPROCESSORS 26
	#endif
	#endif

	/* BSD-derived systems use sysctl() to get the number of processors */
	#if defined(BSDI) \|\| defined(FREEBSD) \|\| defined(NETBSD) \
	\|\| defined(OPENBSD) \|\| defined(DARWIN)
	#define _PR_HAVE_SYSCTL
	#include <sys/param.h>
	#include <sys/sysctl.h>
	#endif

	#if defined(DARWIN)
	#include <mach/mach_init.h>
	#include <mach/mach_host.h>
	#endif

	#if defined(HPUX)
	#include <sys/mpctl.h>
	#include <sys/pstat.h>
	#endif

	#if defined(XP_UNIX)
	#include <unistd.h>
	#include <sys/utsname.h>
	#endif

	#if defined(AIX)
	#include <cf.h>
	#include <sys/cfgodm.h>
	#endif

	#if defined(WIN32)
	/* This struct is not present in VC6 headers, so declare it here */
	typedef struct {
	DWORD dwLength;
	DWORD dwMemoryLoad;
	DWORDLONG ullTotalPhys;
	DWORDLONG ullAvailPhys;
	DWORDLONG ullToalPageFile;
	DWORDLONG ullAvailPageFile;
	DWORDLONG ullTotalVirtual;
	DWORDLONG ullAvailVirtual;
	DWORDLONG ullAvailExtendedVirtual;
	} PR_MEMORYSTATUSEX;

	/* Typedef for dynamic lookup of GlobalMemoryStatusEx(). */
	typedef BOOL (WINAPI GlobalMemoryStatusExFn)(PR_MEMORYSTATUSEX );
	#endif

	PR_IMPLEMENT(char) PR_GetDirectorySeparator(void)
	{
	return PR_DIRECTORY_SEPARATOR;
	} /* PR_GetDirectorySeparator */

	/*
	** OBSOLETE -- the function name is misspelled.
	*/
	PR_IMPLEMENT(char) PR_GetDirectorySepartor(void)
	{
	#if defined(DEBUG)
	static PRBool warn = PR_TRUE;
	if (warn) {
	warn = _PR_Obsolete("PR_GetDirectorySepartor()",
	"PR_GetDirectorySeparator()");
	}
	#endif
	return PR_GetDirectorySeparator();
	} /* PR_GetDirectorySepartor */

	PR_IMPLEMENT(char) PR_GetPathSeparator(void)
	{
	return PR_PATH_SEPARATOR;
	} /* PR_GetPathSeparator */

	PR_IMPLEMENT(PRStatus) PR_GetSystemInfo(PRSysInfo cmd, char *buf, PRUint32 buflen)
	{
	PRUintn len = 0;

	if (!_pr_initialized) _PR_ImplicitInitialization();

	switch(cmd)
	{
	case PR_SI_HOSTNAME:
	case PR_SI_HOSTNAME_UNTRUNCATED:
	if (PR_FAILURE == _PR_MD_GETHOSTNAME(buf, (PRUintn)buflen))
	return PR_FAILURE;

	if (cmd == PR_SI_HOSTNAME_UNTRUNCATED)
	break;
	/*
	* On some platforms a system does not have a hostname and
	* its IP address is returned instead. The following code
	* should be skipped on those platforms.
	*/
	#ifndef _PR_GET_HOST_ADDR_AS_NAME
	/* Return the unqualified hostname */
	while (buf[len] && (len < buflen)) {
	if (buf[len] == '.') {
	buf[len] = '\0';
	break;
	}
	len += 1;
	}
	#endif
	break;

	case PR_SI_SYSNAME:
	/* Return the operating system name */
	#if defined(XP_UNIX) \|\| defined(WIN32)
	if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen))
	return PR_FAILURE;
	#else
	(void)PR_snprintf(buf, buflen, _PR_SI_SYSNAME);
	#endif
	break;

	case PR_SI_RELEASE:
	/* Return the version of the operating system */
	#if defined(XP_UNIX) \|\| defined(WIN32)
	if (PR_FAILURE == _PR_MD_GETSYSINFO(cmd, buf, (PRUintn)buflen))
	return PR_FAILURE;
	#endif
	#if defined(XP_OS2)
	{
	ULONG os2ver[2] = {0};
	DosQuerySysInfo(QSV_VERSION_MINOR, QSV_VERSION_REVISION,
	&os2ver, sizeof(os2ver));
	/* Formatting for normal usage (2.11, 3.0, 4.0, 4.5); officially,
	Warp 4 is version 2.40.00, WSeB 2.45.00 */
	if (os2ver[0] < 30)
	(void)PR_snprintf(buf, buflen, "%s%lu",
	"2.", os2ver[0]);
	else if (os2ver[0] < 45)
	(void)PR_snprintf(buf, buflen, "%lu%s%lu",
	os2ver[0]/10, ".", os2ver[1]);
	else
	(void)PR_snprintf(buf, buflen, "%.1f",
	os2ver[0]/10.0);
	}
	#endif /* OS2 */
	break;

	case PR_SI_ARCHITECTURE:
	/* Return the architecture of the machine (ie. x86, mips, alpha, ...)*/
	(void)PR_snprintf(buf, buflen, _PR_SI_ARCHITECTURE);
	break;
	default:
	PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
	return PR_FAILURE;
	}
	return PR_SUCCESS;
	}

	/*
	** PR_GetNumberOfProcessors()
	**
	** Implementation notes:
	** Every platform does it a bit different.
	** numCpus is the returned value.
	** for each platform's "if defined" section
	** declare your local variable
	** do your thing, assign to numCpus
	** order of the if defined()s may be important,
	** especially for unix variants. Do platform
	** specific implementations before XP_UNIX.
	**
	*/
	PR_IMPLEMENT(PRInt32) PR_GetNumberOfProcessors( void )
	{
	PRInt32 numCpus;
	#if defined(WIN32)
	SYSTEM_INFO info;

	GetSystemInfo( &info );
	numCpus = info.dwNumberOfProcessors;
	#elif defined(BEOS)
	system_info sysInfo;

	get_system_info(&sysInfo);
	numCpus = sysInfo.cpu_count;
	#elif defined(OS2)
	DosQuerySysInfo( QSV_NUMPROCESSORS, QSV_NUMPROCESSORS, &numCpus, sizeof(numCpus));
	#elif defined(_PR_HAVE_SYSCTL)
	int mib[2];
	int rc;
	size_t len = sizeof(numCpus);

	mib[0] = CTL_HW;
	mib[1] = HW_NCPU;
	rc = sysctl( mib, 2, &numCpus, &len, NULL, 0 );
	if ( -1 == rc ) {
	numCpus = -1; /* set to -1 for return value on error */
	_PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
	}
	#elif defined(HPUX)
	numCpus = mpctl( MPC_GETNUMSPUS, 0, 0 );
	if ( numCpus < 1 ) {
	numCpus = -1; /* set to -1 for return value on error */
	_PR_MD_MAP_DEFAULT_ERROR( _MD_ERRNO() );
	}
	#elif defined(IRIX)
	numCpus = sysconf( _SC_NPROC_ONLN );
	#elif defined(RISCOS) \|\| defined(SYMBIAN)
	numCpus = 1;
	#elif defined(XP_UNIX)
	numCpus = sysconf( _SC_NPROCESSORS_ONLN );
	#else
	#error "An implementation is required"
	#endif
	return(numCpus);
	} /* end PR_GetNumberOfProcessors() */

	/*
	** PR_GetPhysicalMemorySize()
	**
	** Implementation notes:
	** Every platform does it a bit different.
	** bytes is the returned value.
	** for each platform's "if defined" section
	** declare your local variable
	** do your thing, assign to bytes.
	**
	*/
	PR_IMPLEMENT(PRUint64) PR_GetPhysicalMemorySize(void)
	{
	PRUint64 bytes = 0;

	#if defined(LINUX) \|\| defined(SOLARIS)

	long pageSize = sysconf(_SC_PAGESIZE);
	long pageCount = sysconf(_SC_PHYS_PAGES);
	bytes = (PRUint64) pageSize * pageCount;

	#elif defined(NETBSD)

	int mib[2];
	int rc;
	uint64_t memSize;
	size_t len = sizeof(memSize);

	mib[0] = CTL_HW;
	mib[1] = HW_PHYSMEM64;
	rc = sysctl(mib, 2, &memSize, &len, NULL, 0);
	if (-1 != rc) {
	bytes = memSize;
	}

	#elif defined(HPUX)

	struct pst_static info;
	int result = pstat_getstatic(&info, sizeof(info), 1, 0);
	if (result == 1)
	bytes = (PRUint64) info.physical_memory * info.page_size;

	#elif defined(DARWIN)

	struct host_basic_info hInfo;
	mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;

	int result = host_info(mach_host_self(),
	HOST_BASIC_INFO,
	(host_info_t) &hInfo,
	&count);
	if (result == KERN_SUCCESS)
	bytes = hInfo.max_mem;

	#elif defined(WIN32)

	/* Try to use the newer GlobalMemoryStatusEx API for Windows 2000+. */
	GlobalMemoryStatusExFn globalMemory = (GlobalMemoryStatusExFn) NULL;
	HMODULE module = GetModuleHandleW(L"kernel32.dll");

	if (module) {
	globalMemory = (GlobalMemoryStatusExFn)GetProcAddress(module, "GlobalMemoryStatusEx");

	if (globalMemory) {
	PR_MEMORYSTATUSEX memStat;
	memStat.dwLength = sizeof(memStat);

	if (globalMemory(&memStat))
	bytes = memStat.ullTotalPhys;
	}
	}

	if (!bytes) {
	/* Fall back to the older API. */
	MEMORYSTATUS memStat;
	memset(&memStat, 0, sizeof(memStat));
	GlobalMemoryStatus(&memStat);
	bytes = memStat.dwTotalPhys;
	}

	#elif defined(OS2)

	ULONG ulPhysMem;
	DosQuerySysInfo(QSV_TOTPHYSMEM,
	QSV_TOTPHYSMEM,
	&ulPhysMem,
	sizeof(ulPhysMem));
	bytes = ulPhysMem;

	#elif defined(AIX)

	if (odm_initialize() == 0) {
	int how_many;
	struct CuAt *obj = getattr("sys0", "realmem", 0, &how_many);
	if (obj != NULL) {
	bytes = (PRUint64) atoi(obj->value) * 1024;
	free(obj);
	}
	odm_terminate();
	}

	#else

	PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);

	#endif

	return bytes;
	} /* end PR_GetPhysicalMemorySize() */