| /* Calculate the size of physical memory. |
| Copyright (C) 2000-2022 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 (void) |
| { |
| #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 4.3.3+. */ |
| 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 (void) |
| { |
| #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 (void) |
| { |
| 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: |
| */ |