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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [libiberty/] [physmem.c] - Blame information for rev 853

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1 38 julius
/* Calculate the size of physical memory.
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   Copyright 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2, or (at your option)
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   any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software Foundation,
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   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
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/* Written by Paul Eggert.  */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if HAVE_SYS_PSTAT_H
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# include <sys/pstat.h>
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#endif
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#if HAVE_SYS_SYSMP_H
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# include <sys/sysmp.h>
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#endif
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#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
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# include <sys/sysinfo.h>
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# include <machine/hal_sysinfo.h>
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#endif
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#if HAVE_SYS_TABLE_H
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# include <sys/table.h>
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#endif
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#include <sys/types.h>
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#if HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#if HAVE_SYS_SYSCTL_H
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# include <sys/sysctl.h>
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#endif
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#if HAVE_SYS_SYSTEMCFG_H
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# include <sys/systemcfg.h>
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#endif
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#ifdef _WIN32
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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/*  MEMORYSTATUSEX is missing from older windows headers, so define
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    a local replacement.  */
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typedef struct
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{
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  DWORD dwLength;
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  DWORD dwMemoryLoad;
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  DWORDLONG ullTotalPhys;
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  DWORDLONG ullAvailPhys;
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  DWORDLONG ullTotalPageFile;
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  DWORDLONG ullAvailPageFile;
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  DWORDLONG ullTotalVirtual;
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  DWORDLONG ullAvailVirtual;
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  DWORDLONG ullAvailExtendedVirtual;
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} lMEMORYSTATUSEX;
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typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
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#endif
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#include "libiberty.h"
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/* Return the total amount of physical memory.  */
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double
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physmem_total (void)
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{
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#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
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  { /* This works on linux-gnu, solaris2 and cygwin.  */
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    double pages = sysconf (_SC_PHYS_PAGES);
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    double pagesize = sysconf (_SC_PAGESIZE);
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    if (0 <= pages && 0 <= pagesize)
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      return pages * pagesize;
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  }
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#endif
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#if HAVE_PSTAT_GETSTATIC
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  { /* This works on hpux11.  */
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    struct pst_static pss;
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    if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
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      {
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        double pages = pss.physical_memory;
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        double pagesize = pss.page_size;
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        if (0 <= pages && 0 <= pagesize)
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          return pages * pagesize;
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      }
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  }
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#endif
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#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
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  { /* This works on irix6. */
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    struct rminfo realmem;
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    if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
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      {
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        double pagesize = sysconf (_SC_PAGESIZE);
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        double pages = realmem.physmem;
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        if (0 <= pages && 0 <= pagesize)
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          return pages * pagesize;
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      }
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  }
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#endif
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#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
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  { /* This works on Tru64 UNIX V4/5.  */
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    int physmem;
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    if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
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                    NULL, NULL, NULL) == 1)
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      {
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        double kbytes = physmem;
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        if (0 <= kbytes)
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          return kbytes * 1024.0;
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      }
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  }
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#endif
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#if HAVE_SYSCTL && defined HW_PHYSMEM
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  { /* This works on *bsd and darwin.  */
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    unsigned int physmem;
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    size_t len = sizeof physmem;
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    static int mib[2] = { CTL_HW, HW_PHYSMEM };
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    if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
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        && len == sizeof (physmem))
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      return (double) physmem;
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  }
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#endif
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#if HAVE__SYSTEM_CONFIGURATION
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  /* This works on AIX 4.3.3+.  */
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  return _system_configuration.physmem;
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#endif
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#if defined _WIN32
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  { /* this works on windows */
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    PFN_MS_EX pfnex;
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    HMODULE h = GetModuleHandle ("kernel32.dll");
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    if (!h)
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      return 0.0;
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    /*  Use GlobalMemoryStatusEx if available.  */
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    if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
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      {
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        lMEMORYSTATUSEX lms_ex;
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        lms_ex.dwLength = sizeof lms_ex;
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        if (!pfnex (&lms_ex))
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          return 0.0;
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        return (double) lms_ex.ullTotalPhys;
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      }
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    /*  Fall back to GlobalMemoryStatus which is always available.
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        but returns wrong results for physical memory > 4GB.  */
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    else
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      {
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        MEMORYSTATUS ms;
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        GlobalMemoryStatus (&ms);
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        return (double) ms.dwTotalPhys;
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      }
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  }
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#endif
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  /* Return 0 if we can't determine the value.  */
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  return 0;
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}
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/* Return the amount of physical memory available.  */
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double
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physmem_available (void)
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{
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#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
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  { /* This works on linux-gnu, solaris2 and cygwin.  */
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    double pages = sysconf (_SC_AVPHYS_PAGES);
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    double pagesize = sysconf (_SC_PAGESIZE);
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    if (0 <= pages && 0 <= pagesize)
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      return pages * pagesize;
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  }
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#endif
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#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
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  { /* This works on hpux11.  */
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    struct pst_static pss;
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    struct pst_dynamic psd;
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    if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
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        && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
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      {
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        double pages = psd.psd_free;
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        double pagesize = pss.page_size;
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        if (0 <= pages && 0 <= pagesize)
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          return pages * pagesize;
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      }
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  }
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#endif
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#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
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  { /* This works on irix6. */
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    struct rminfo realmem;
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    if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
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      {
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        double pagesize = sysconf (_SC_PAGESIZE);
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        double pages = realmem.availrmem;
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        if (0 <= pages && 0 <= pagesize)
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          return pages * pagesize;
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      }
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  }
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#endif
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#if HAVE_TABLE && defined TBL_VMSTATS
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  { /* This works on Tru64 UNIX V4/5.  */
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    struct tbl_vmstats vmstats;
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    if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
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      {
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        double pages = vmstats.free_count;
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        double pagesize = vmstats.pagesize;
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        if (0 <= pages && 0 <= pagesize)
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          return pages * pagesize;
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      }
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  }
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#endif
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#if HAVE_SYSCTL && defined HW_USERMEM
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  { /* This works on *bsd and darwin.  */
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    unsigned int usermem;
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    size_t len = sizeof usermem;
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    static int mib[2] = { CTL_HW, HW_USERMEM };
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    if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
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        && len == sizeof (usermem))
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      return (double) usermem;
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  }
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#endif
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#if defined _WIN32
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  { /* this works on windows */
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    PFN_MS_EX pfnex;
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    HMODULE h = GetModuleHandle ("kernel32.dll");
257
 
258
    if (!h)
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      return 0.0;
260
 
261
    /*  Use GlobalMemoryStatusEx if available.  */
262
    if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
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      {
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        lMEMORYSTATUSEX lms_ex;
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        lms_ex.dwLength = sizeof lms_ex;
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        if (!pfnex (&lms_ex))
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          return 0.0;
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        return (double) lms_ex.ullAvailPhys;
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      }
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271
    /*  Fall back to GlobalMemoryStatus which is always available.
272
        but returns wrong results for physical memory > 4GB  */
273
    else
274
      {
275
        MEMORYSTATUS ms;
276
        GlobalMemoryStatus (&ms);
277
        return (double) ms.dwAvailPhys;
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      }
279
  }
280
#endif
281
 
282
  /* Guess 25% of physical memory.  */
283
  return physmem_total () / 4;
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}
285
 
286
 
287
#if DEBUG
288
 
289
# include <stdio.h>
290
# include <stdlib.h>
291
 
292
int
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main (void)
294
{
295
  printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
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  exit (0);
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}
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#endif /* DEBUG */
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/*
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Local Variables:
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compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
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End:
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*/

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