1 /* Calculate the size of physical memory.
2 Copyright (C) 2000-2023 Free Software Foundation, Inc.
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)
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.
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Paul Eggert. */
29 # include <sys/pstat.h>
33 # include <sys/sysmp.h>
36 #if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
37 # include <sys/sysinfo.h>
38 # include <machine/hal_sysinfo.h>
42 # include <sys/table.h>
45 #include <sys/types.h>
48 # include <sys/param.h>
52 # include <sys/sysctl.h>
55 #if HAVE_SYS_SYSTEMCFG_H
56 # include <sys/systemcfg.h>
60 # define WIN32_LEAN_AND_MEAN
62 /* MEMORYSTATUSEX is missing from older windows headers, so define
63 a local replacement. */
68 DWORDLONG ullTotalPhys
;
69 DWORDLONG ullAvailPhys
;
70 DWORDLONG ullTotalPageFile
;
71 DWORDLONG ullAvailPageFile
;
72 DWORDLONG ullTotalVirtual
;
73 DWORDLONG ullAvailVirtual
;
74 DWORDLONG ullAvailExtendedVirtual
;
76 typedef WINBOOL (WINAPI
*PFN_MS_EX
) (lMEMORYSTATUSEX
*);
79 #include "libiberty.h"
81 /* Return the total amount of physical memory. */
85 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
86 { /* This works on linux-gnu, solaris2 and cygwin. */
87 double pages
= sysconf (_SC_PHYS_PAGES
);
88 double pagesize
= sysconf (_SC_PAGESIZE
);
89 if (0 <= pages
&& 0 <= pagesize
)
90 return pages
* pagesize
;
94 #if HAVE_PSTAT_GETSTATIC
95 { /* This works on hpux11. */
96 struct pst_static pss
;
97 if (0 <= pstat_getstatic (&pss
, sizeof pss
, 1, 0))
99 double pages
= pss
.physical_memory
;
100 double pagesize
= pss
.page_size
;
101 if (0 <= pages
&& 0 <= pagesize
)
102 return pages
* pagesize
;
107 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
108 { /* This works on irix6. */
109 struct rminfo realmem
;
110 if (sysmp (MP_SAGET
, MPSA_RMINFO
, &realmem
, sizeof realmem
) == 0)
112 double pagesize
= sysconf (_SC_PAGESIZE
);
113 double pages
= realmem
.physmem
;
114 if (0 <= pages
&& 0 <= pagesize
)
115 return pages
* pagesize
;
120 #if HAVE_GETSYSINFO && defined GSI_PHYSMEM
121 { /* This works on Tru64 UNIX V4/5. */
124 if (getsysinfo (GSI_PHYSMEM
, (caddr_t
) &physmem
, sizeof (physmem
),
125 NULL
, NULL
, NULL
) == 1)
127 double kbytes
= physmem
;
130 return kbytes
* 1024.0;
135 #if HAVE_SYSCTL && defined HW_PHYSMEM
136 { /* This works on *bsd and darwin. */
137 unsigned int physmem
;
138 size_t len
= sizeof physmem
;
139 static int mib
[2] = { CTL_HW
, HW_PHYSMEM
};
141 if (sysctl (mib
, ARRAY_SIZE (mib
), &physmem
, &len
, NULL
, 0) == 0
142 && len
== sizeof (physmem
))
143 return (double) physmem
;
147 #if HAVE__SYSTEM_CONFIGURATION
148 /* This works on AIX 4.3.3+. */
149 return _system_configuration
.physmem
;
153 { /* this works on windows */
155 HMODULE h
= GetModuleHandle ("kernel32.dll");
160 /* Use GlobalMemoryStatusEx if available. */
161 if ((pfnex
= (PFN_MS_EX
) GetProcAddress (h
, "GlobalMemoryStatusEx")))
163 lMEMORYSTATUSEX lms_ex
;
164 lms_ex
.dwLength
= sizeof lms_ex
;
165 if (!pfnex (&lms_ex
))
167 return (double) lms_ex
.ullTotalPhys
;
170 /* Fall back to GlobalMemoryStatus which is always available.
171 but returns wrong results for physical memory > 4GB. */
175 GlobalMemoryStatus (&ms
);
176 return (double) ms
.dwTotalPhys
;
181 /* Return 0 if we can't determine the value. */
185 /* Return the amount of physical memory available. */
187 physmem_available (void)
189 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
190 { /* This works on linux-gnu, solaris2 and cygwin. */
191 double pages
= sysconf (_SC_AVPHYS_PAGES
);
192 double pagesize
= sysconf (_SC_PAGESIZE
);
193 if (0 <= pages
&& 0 <= pagesize
)
194 return pages
* pagesize
;
198 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
199 { /* This works on hpux11. */
200 struct pst_static pss
;
201 struct pst_dynamic psd
;
202 if (0 <= pstat_getstatic (&pss
, sizeof pss
, 1, 0)
203 && 0 <= pstat_getdynamic (&psd
, sizeof psd
, 1, 0))
205 double pages
= psd
.psd_free
;
206 double pagesize
= pss
.page_size
;
207 if (0 <= pages
&& 0 <= pagesize
)
208 return pages
* pagesize
;
213 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
214 { /* This works on irix6. */
215 struct rminfo realmem
;
216 if (sysmp (MP_SAGET
, MPSA_RMINFO
, &realmem
, sizeof realmem
) == 0)
218 double pagesize
= sysconf (_SC_PAGESIZE
);
219 double pages
= realmem
.availrmem
;
220 if (0 <= pages
&& 0 <= pagesize
)
221 return pages
* pagesize
;
226 #if HAVE_TABLE && defined TBL_VMSTATS
227 { /* This works on Tru64 UNIX V4/5. */
228 struct tbl_vmstats vmstats
;
230 if (table (TBL_VMSTATS
, 0, &vmstats
, 1, sizeof (vmstats
)) == 1)
232 double pages
= vmstats
.free_count
;
233 double pagesize
= vmstats
.pagesize
;
235 if (0 <= pages
&& 0 <= pagesize
)
236 return pages
* pagesize
;
241 #if HAVE_SYSCTL && defined HW_USERMEM
242 { /* This works on *bsd and darwin. */
243 unsigned int usermem
;
244 size_t len
= sizeof usermem
;
245 static int mib
[2] = { CTL_HW
, HW_USERMEM
};
247 if (sysctl (mib
, ARRAY_SIZE (mib
), &usermem
, &len
, NULL
, 0) == 0
248 && len
== sizeof (usermem
))
249 return (double) usermem
;
254 { /* this works on windows */
256 HMODULE h
= GetModuleHandle ("kernel32.dll");
261 /* Use GlobalMemoryStatusEx if available. */
262 if ((pfnex
= (PFN_MS_EX
) GetProcAddress (h
, "GlobalMemoryStatusEx")))
264 lMEMORYSTATUSEX lms_ex
;
265 lms_ex
.dwLength
= sizeof lms_ex
;
266 if (!pfnex (&lms_ex
))
268 return (double) lms_ex
.ullAvailPhys
;
271 /* Fall back to GlobalMemoryStatus which is always available.
272 but returns wrong results for physical memory > 4GB */
276 GlobalMemoryStatus (&ms
);
277 return (double) ms
.dwAvailPhys
;
282 /* Guess 25% of physical memory. */
283 return physmem_total () / 4;
295 printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
303 compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"