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 "libiberty.h"
  46
  47 /* Return the total amount of physical memory.  */
  48 double
  49 physmem_total ()
  50 {
  51 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
  52   {
  53     double pages = sysconf (_SC_PHYS_PAGES);
  54     double pagesize = sysconf (_SC_PAGESIZE);
  55     if (0 <= pages && 0 <= pagesize)
  56       return pages * pagesize;
  57   }
  58 #endif
  59
  60 #if HAVE_PSTAT_GETSTATIC
  61   { /* This works on hpux11.  */
  62     struct pst_static pss;
  63     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
  64       {
  65         double pages = pss.physical_memory;
  66         double pagesize = pss.page_size;
  67         if (0 <= pages && 0 <= pagesize)
  68           return pages * pagesize;
  69       }
  70   }
  71 #endif
  72
  73 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
  74   { /* This works on irix6. */
  75     struct rminfo realmem;
  76     if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == 0)
  77       {
  78         double pagesize = sysconf (_SC_PAGESIZE);
  79         double pages = realmem.physmem;
  80         if (0 <= pages && 0 <= pagesize)
  81           return pages * pagesize;
  82       }
  83   }
  84 #endif
  85
  86 #if HAVE_GETSYSINFO
  87   { /* This works on Tru64 UNIX V4/5.  */
  88     int physmem;
  89
  90     if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
  91                     NULL, NULL, NULL) == 1)
  92       {
  93         double kbytes = physmem;
  94
  95         if (0 <= kbytes)
  96           return kbytes * 1024.0;
  97       }
  98   }
  99 #endif
 100
 101   /* Return 0 if we can't determine the value.  */
 102   return 0;
 103 }
 104
 105 /* Return the amount of physical memory available.  */
 106 double
 107 physmem_available ()
 108 {
 109 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
 110   {
 111     double pages = sysconf (_SC_AVPHYS_PAGES);
 112     double pagesize = sysconf (_SC_PAGESIZE);
 113     if (0 <= pages && 0 <= pagesize)
 114       return pages * pagesize;
 115   }
 116 #endif
 117
 118 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
 119   { /* This works on hpux11.  */
 120     struct pst_static pss;
 121     struct pst_dynamic psd;
 122     if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
 123         && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
 124       {
 125         double pages = psd.psd_free;
 126         double pagesize = pss.page_size;
 127         if (0 <= pages && 0 <= pagesize)
 128           return pages * pagesize;
 129       }
 130   }
 131 #endif
 132
 133 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
 134   { /* This works on irix6. */
 135     struct rminfo realmem;
 136     if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == 0)
 137       {
 138         double pagesize = sysconf (_SC_PAGESIZE);
 139         double pages = realmem.availrmem;
 140         if (0 <= pages && 0 <= pagesize)
 141           return pages * pagesize;
 142       }
 143   }
 144 #endif
 145
 146 #if HAVE_TABLE && HAVE_SYS_TABLE_H
 147   { /* This works on Tru64 UNIX V4/5.  */
 148     struct tbl_vmstats vmstats;
 149
 150     if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
 151       {
 152         double pages = vmstats.free_count;
 153         double pagesize = vmstats.pagesize;
 154
 155         if (0 <= pages && 0 <= pagesize)
 156           return pages * pagesize;
 157       }
 158   }
 159 #endif
 160
 161   /* Guess 25% of physical memory.  */
 162   return physmem_total () / 4;
 163 }
 164
 165
 166 #if DEBUG
 167
 168 # include <stdio.h>
 169 # include <stdlib.h>
 170
 171 int
 172 main ()
 173 {
 174   printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
 175   exit (0);
 176 }
 177
 178 #endif /* DEBUG */
 179
 180 /*
 181 Local Variables:
 182 compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
 183 End:
 184 */