306 lines
7.1 KiB
C
306 lines
7.1 KiB
C
/* Calculate the size of physical memory.
|
|
Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* Written by Paul Eggert. */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#if HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_PSTAT_H
|
|
# include <sys/pstat.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_SYSMP_H
|
|
# include <sys/sysmp.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
|
|
# include <sys/sysinfo.h>
|
|
# include <machine/hal_sysinfo.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_TABLE_H
|
|
# include <sys/table.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
|
|
#if HAVE_SYS_PARAM_H
|
|
# include <sys/param.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_SYSCTL_H
|
|
# include <sys/sysctl.h>
|
|
#endif
|
|
|
|
#if HAVE_SYS_SYSTEMCFG_H
|
|
# include <sys/systemcfg.h>
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
# define WIN32_LEAN_AND_MEAN
|
|
# include <windows.h>
|
|
/* MEMORYSTATUSEX is missing from older windows headers, so define
|
|
a local replacement. */
|
|
typedef struct
|
|
{
|
|
DWORD dwLength;
|
|
DWORD dwMemoryLoad;
|
|
DWORDLONG ullTotalPhys;
|
|
DWORDLONG ullAvailPhys;
|
|
DWORDLONG ullTotalPageFile;
|
|
DWORDLONG ullAvailPageFile;
|
|
DWORDLONG ullTotalVirtual;
|
|
DWORDLONG ullAvailVirtual;
|
|
DWORDLONG ullAvailExtendedVirtual;
|
|
} lMEMORYSTATUSEX;
|
|
typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
|
|
#endif
|
|
|
|
#include "libiberty.h"
|
|
|
|
/* Return the total amount of physical memory. */
|
|
double
|
|
physmem_total ()
|
|
{
|
|
#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
|
|
{ /* This works on linux-gnu, solaris2 and cygwin. */
|
|
double pages = sysconf (_SC_PHYS_PAGES);
|
|
double pagesize = sysconf (_SC_PAGESIZE);
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_PSTAT_GETSTATIC
|
|
{ /* This works on hpux11. */
|
|
struct pst_static pss;
|
|
if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
|
|
{
|
|
double pages = pss.physical_memory;
|
|
double pagesize = pss.page_size;
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
|
|
{ /* This works on irix6. */
|
|
struct rminfo realmem;
|
|
if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
|
|
{
|
|
double pagesize = sysconf (_SC_PAGESIZE);
|
|
double pages = realmem.physmem;
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
|
|
{ /* This works on Tru64 UNIX V4/5. */
|
|
int physmem;
|
|
|
|
if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
|
|
NULL, NULL, NULL) == 1)
|
|
{
|
|
double kbytes = physmem;
|
|
|
|
if (0 <= kbytes)
|
|
return kbytes * 1024.0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_SYSCTL && defined HW_PHYSMEM
|
|
{ /* This works on *bsd and darwin. */
|
|
unsigned int physmem;
|
|
size_t len = sizeof physmem;
|
|
static int mib[2] = { CTL_HW, HW_PHYSMEM };
|
|
|
|
if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
|
|
&& len == sizeof (physmem))
|
|
return (double) physmem;
|
|
}
|
|
#endif
|
|
|
|
#if HAVE__SYSTEM_CONFIGURATION
|
|
/* This works on AIX. */
|
|
return _system_configuration.physmem;
|
|
#endif
|
|
|
|
#if defined _WIN32
|
|
{ /* this works on windows */
|
|
PFN_MS_EX pfnex;
|
|
HMODULE h = GetModuleHandle ("kernel32.dll");
|
|
|
|
if (!h)
|
|
return 0.0;
|
|
|
|
/* Use GlobalMemoryStatusEx if available. */
|
|
if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
|
|
{
|
|
lMEMORYSTATUSEX lms_ex;
|
|
lms_ex.dwLength = sizeof lms_ex;
|
|
if (!pfnex (&lms_ex))
|
|
return 0.0;
|
|
return (double) lms_ex.ullTotalPhys;
|
|
}
|
|
|
|
/* Fall back to GlobalMemoryStatus which is always available.
|
|
but returns wrong results for physical memory > 4GB. */
|
|
else
|
|
{
|
|
MEMORYSTATUS ms;
|
|
GlobalMemoryStatus (&ms);
|
|
return (double) ms.dwTotalPhys;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Return 0 if we can't determine the value. */
|
|
return 0;
|
|
}
|
|
|
|
/* Return the amount of physical memory available. */
|
|
double
|
|
physmem_available ()
|
|
{
|
|
#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
|
|
{ /* This works on linux-gnu, solaris2 and cygwin. */
|
|
double pages = sysconf (_SC_AVPHYS_PAGES);
|
|
double pagesize = sysconf (_SC_PAGESIZE);
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
|
|
{ /* This works on hpux11. */
|
|
struct pst_static pss;
|
|
struct pst_dynamic psd;
|
|
if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
|
|
&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
|
|
{
|
|
double pages = psd.psd_free;
|
|
double pagesize = pss.page_size;
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
|
|
{ /* This works on irix6. */
|
|
struct rminfo realmem;
|
|
if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
|
|
{
|
|
double pagesize = sysconf (_SC_PAGESIZE);
|
|
double pages = realmem.availrmem;
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_TABLE && defined TBL_VMSTATS
|
|
{ /* This works on Tru64 UNIX V4/5. */
|
|
struct tbl_vmstats vmstats;
|
|
|
|
if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
|
|
{
|
|
double pages = vmstats.free_count;
|
|
double pagesize = vmstats.pagesize;
|
|
|
|
if (0 <= pages && 0 <= pagesize)
|
|
return pages * pagesize;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_SYSCTL && defined HW_USERMEM
|
|
{ /* This works on *bsd and darwin. */
|
|
unsigned int usermem;
|
|
size_t len = sizeof usermem;
|
|
static int mib[2] = { CTL_HW, HW_USERMEM };
|
|
|
|
if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
|
|
&& len == sizeof (usermem))
|
|
return (double) usermem;
|
|
}
|
|
#endif
|
|
|
|
#if defined _WIN32
|
|
{ /* this works on windows */
|
|
PFN_MS_EX pfnex;
|
|
HMODULE h = GetModuleHandle ("kernel32.dll");
|
|
|
|
if (!h)
|
|
return 0.0;
|
|
|
|
/* Use GlobalMemoryStatusEx if available. */
|
|
if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
|
|
{
|
|
lMEMORYSTATUSEX lms_ex;
|
|
lms_ex.dwLength = sizeof lms_ex;
|
|
if (!pfnex (&lms_ex))
|
|
return 0.0;
|
|
return (double) lms_ex.ullAvailPhys;
|
|
}
|
|
|
|
/* Fall back to GlobalMemoryStatus which is always available.
|
|
but returns wrong results for physical memory > 4GB */
|
|
else
|
|
{
|
|
MEMORYSTATUS ms;
|
|
GlobalMemoryStatus (&ms);
|
|
return (double) ms.dwAvailPhys;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Guess 25% of physical memory. */
|
|
return physmem_total () / 4;
|
|
}
|
|
|
|
|
|
#if DEBUG
|
|
|
|
# include <stdio.h>
|
|
# include <stdlib.h>
|
|
|
|
int
|
|
main ()
|
|
{
|
|
printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
|
|
exit (0);
|
|
}
|
|
|
|
#endif /* DEBUG */
|
|
|
|
/*
|
|
Local Variables:
|
|
compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
|
|
End:
|
|
*/
|