libiberty/physmem.c

   1 /* Calculate the size of physical memory.
   2    Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by Paul Eggert and Jim Meyering.  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if HAVE_UNISTD_H
  25 # include <unistd.h>
  26 #endif
  27
  28 #if HAVE_SYS_PSTAT_H
  29 # include <sys/pstat.h>
  30 #endif
  31
  32 #if HAVE_SYS_SYSMP_H
  33 #include <sys/sysmp.h>
  34 #endif
  35
  36 #if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
  37 #  include <sys/sysinfo.h>
  38 #  include <machine/hal_sysinfo.h>
  39 #endif
  40
  41 #if HAVE_SYS_TABLE_H
  42 #  include <sys/table.h>
  43 #endif
  44
  45 #include <sys/types.h>
  46
  47 #if HAVE_SYS_PARAM_H
  48 #include <sys/param.h>
  49 #endif
  50
  51 #if HAVE_SYS_SYSCTL_H
  52 #include <sys/sysctl.h>
  53 #endif
  54
  55 #include "libiberty.h"
  56
  57 /* Return the total amount of physical memory.  */
  58 double
  59 physmem_total ()
  60 {
  61 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
  62   {
  63     double pages = sysconf (_SC_PHYS_PAGES);
  64     double pagesize = sysconf (_SC_PAGESIZE);
  65     if (0 <= pages && 0 <= pagesize)
  66       return pages * pagesize;
  67   }
  68 #endif
  69
  70 #if HAVE_PSTAT_GETSTATIC
  71   { /* This works on hpux11.  */
  72     struct pst_static pss;
  73     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
  74       {
  75         double pages = pss.physical_memory;
  76         double pagesize = pss.page_size;
  77         if (0 <= pages && 0 <= pagesize)
  78           return pages * pagesize;
  79       }
  80   }
  81 #endif
  82
  83 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
  84   { /* This works on irix6. */
  85     struct rminfo realmem;
  86     if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == 0)
  87       {
  88         double pagesize = sysconf (_SC_PAGESIZE);
  89         double pages = realmem.physmem;
  90         if (0 <= pages && 0 <= pagesize)
  91           return pages * pagesize;
  92       }
  93   }
  94 #endif
  95
  96 #if HAVE_GETSYSINFO
  97   { /* This works on Tru64 UNIX V4/5.  */
  98     int physmem;
  99
 100     if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
 101                     NULL, NULL, NULL) == 1)
 102       {
 103         double kbytes = physmem;
 104
 105         if (0 <= kbytes)
 106           return kbytes * 1024.0;
 107       }
 108   }
 109 #endif
 110
 111 #if HAVE_SYSCTL && defined HW_PHYSMEM
 112   { /* This works on *bsd and darwin.  */
 113     unsigned int physmem;
 114     size_t len = sizeof(physmem);
 115     static int mib[2] = {CTL_HW, HW_PHYSMEM};
 116
 117     if (sysctl(mib, ARRAY_SIZE(mib), &physmem, &len, NULL, 0) == 0
 118         && len == sizeof (physmem))
 119       return (double)physmem;
 120   }
 121 #endif
 122
 123   /* Return 0 if we can't determine the value.  */
 124   return 0;
 125 }
 126
 127 /* Return the amount of physical memory available.  */
 128 double
 129 physmem_available ()
 130 {
 131 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
 132   {
 133     double pages = sysconf (_SC_AVPHYS_PAGES);
 134     double pagesize = sysconf (_SC_PAGESIZE);
 135     if (0 <= pages && 0 <= pagesize)
 136       return pages * pagesize;
 137   }
 138 #endif
 139
 140 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
 141   { /* This works on hpux11.  */
 142     struct pst_static pss;
 143     struct pst_dynamic psd;
 144     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
 145         && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
 146       {
 147         double pages = psd.psd_free;
 148         double pagesize = pss.page_size;
 149         if (0 <= pages && 0 <= pagesize)
 150           return pages * pagesize;
 151       }
 152   }
 153 #endif
 154
 155 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
 156   { /* This works on irix6. */
 157     struct rminfo realmem;
 158     if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == 0)
 159       {
 160         double pagesize = sysconf (_SC_PAGESIZE);
 161         double pages = realmem.availrmem;
 162         if (0 <= pages && 0 <= pagesize)
 163           return pages * pagesize;
 164       }
 165   }
 166 #endif
 167
 168 #if HAVE_TABLE && HAVE_SYS_TABLE_H
 169   { /* This works on Tru64 UNIX V4/5.  */
 170     struct tbl_vmstats vmstats;
 171
 172     if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
 173       {
 174         double pages = vmstats.free_count;
 175         double pagesize = vmstats.pagesize;
 176
 177         if (0 <= pages && 0 <= pagesize)
 178           return pages * pagesize;
 179       }
 180   }
 181 #endif
 182
 183 #if HAVE_SYSCTL && defined HW_USERMEM
 184   { /* This works on *bsd and darwin.  */
 185     unsigned int usermem;
 186     size_t len = sizeof(usermem);
 187     static int mib[2] = {CTL_HW, HW_USERMEM};
 188
 189     if (sysctl(mib, ARRAY_SIZE(mib), &usermem, &len, NULL, 0) == 0
 190         && len == sizeof (usermem))
 191       return (double)usermem;
 192   }
 193 #endif
 194
 195   /* Guess 25% of physical memory.  */
 196   return physmem_total () / 4;
 197 }
 198
 199
 200 #if DEBUG
 201
 202 # include <stdio.h>
 203 # include <stdlib.h>
 204
 205 int
 206 main ()
 207 {
 208   printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
 209   exit (0);
 210 }
 211
 212 #endif /* DEBUG */
 213
 214 /*
 215 Local Variables:
 216 compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
 217 End:
 218 */