| 1 | /* Calculate the size of physical memory. |
| 2 | Copyright (C) 2000-2017 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 17 | |
| 18 | /* Written by Paul Eggert. */ |
| 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 | #if HAVE_SYS_SYSTEMCFG_H |
| 56 | # include <sys/systemcfg.h> |
| 57 | #endif |
| 58 | |
| 59 | #ifdef _WIN32 |
| 60 | # define WIN32_LEAN_AND_MEAN |
| 61 | # include <windows.h> |
| 62 | /* MEMORYSTATUSEX is missing from older windows headers, so define |
| 63 | a local replacement. */ |
| 64 | typedef struct |
| 65 | { |
| 66 | DWORD dwLength; |
| 67 | DWORD dwMemoryLoad; |
| 68 | DWORDLONG ullTotalPhys; |
| 69 | DWORDLONG ullAvailPhys; |
| 70 | DWORDLONG ullTotalPageFile; |
| 71 | DWORDLONG ullAvailPageFile; |
| 72 | DWORDLONG ullTotalVirtual; |
| 73 | DWORDLONG ullAvailVirtual; |
| 74 | DWORDLONG ullAvailExtendedVirtual; |
| 75 | } lMEMORYSTATUSEX; |
| 76 | typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*); |
| 77 | #endif |
| 78 | |
| 79 | #include "libiberty.h" |
| 80 | |
| 81 | /* Return the total amount of physical memory. */ |
| 82 | double |
| 83 | physmem_total (void) |
| 84 | { |
| 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; |
| 91 | } |
| 92 | #endif |
| 93 | |
| 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)) |
| 98 | { |
| 99 | double pages = pss.physical_memory; |
| 100 | double pagesize = pss.page_size; |
| 101 | if (0 <= pages && 0 <= pagesize) |
| 102 | return pages * pagesize; |
| 103 | } |
| 104 | } |
| 105 | #endif |
| 106 | |
| 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) |
| 111 | { |
| 112 | double pagesize = sysconf (_SC_PAGESIZE); |
| 113 | double pages = realmem.physmem; |
| 114 | if (0 <= pages && 0 <= pagesize) |
| 115 | return pages * pagesize; |
| 116 | } |
| 117 | } |
| 118 | #endif |
| 119 | |
| 120 | #if HAVE_GETSYSINFO && defined GSI_PHYSMEM |
| 121 | { /* This works on Tru64 UNIX V4/5. */ |
| 122 | int physmem; |
| 123 | |
| 124 | if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem), |
| 125 | NULL, NULL, NULL) == 1) |
| 126 | { |
| 127 | double kbytes = physmem; |
| 128 | |
| 129 | if (0 <= kbytes) |
| 130 | return kbytes * 1024.0; |
| 131 | } |
| 132 | } |
| 133 | #endif |
| 134 | |
| 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 }; |
| 140 | |
| 141 | if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0 |
| 142 | && len == sizeof (physmem)) |
| 143 | return (double) physmem; |
| 144 | } |
| 145 | #endif |
| 146 | |
| 147 | #if HAVE__SYSTEM_CONFIGURATION |
| 148 | /* This works on AIX 4.3.3+. */ |
| 149 | return _system_configuration.physmem; |
| 150 | #endif |
| 151 | |
| 152 | #if defined _WIN32 |
| 153 | { /* this works on windows */ |
| 154 | PFN_MS_EX pfnex; |
| 155 | HMODULE h = GetModuleHandle ("kernel32.dll"); |
| 156 | |
| 157 | if (!h) |
| 158 | return 0.0; |
| 159 | |
| 160 | /* Use GlobalMemoryStatusEx if available. */ |
| 161 | if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx"))) |
| 162 | { |
| 163 | lMEMORYSTATUSEX lms_ex; |
| 164 | lms_ex.dwLength = sizeof lms_ex; |
| 165 | if (!pfnex (&lms_ex)) |
| 166 | return 0.0; |
| 167 | return (double) lms_ex.ullTotalPhys; |
| 168 | } |
| 169 | |
| 170 | /* Fall back to GlobalMemoryStatus which is always available. |
| 171 | but returns wrong results for physical memory > 4GB. */ |
| 172 | else |
| 173 | { |
| 174 | MEMORYSTATUS ms; |
| 175 | GlobalMemoryStatus (&ms); |
| 176 | return (double) ms.dwTotalPhys; |
| 177 | } |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | /* Return 0 if we can't determine the value. */ |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | /* Return the amount of physical memory available. */ |
| 186 | double |
| 187 | physmem_available (void) |
| 188 | { |
| 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; |
| 195 | } |
| 196 | #endif |
| 197 | |
| 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)) |
| 204 | { |
| 205 | double pages = psd.psd_free; |
| 206 | double pagesize = pss.page_size; |
| 207 | if (0 <= pages && 0 <= pagesize) |
| 208 | return pages * pagesize; |
| 209 | } |
| 210 | } |
| 211 | #endif |
| 212 | |
| 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) |
| 217 | { |
| 218 | double pagesize = sysconf (_SC_PAGESIZE); |
| 219 | double pages = realmem.availrmem; |
| 220 | if (0 <= pages && 0 <= pagesize) |
| 221 | return pages * pagesize; |
| 222 | } |
| 223 | } |
| 224 | #endif |
| 225 | |
| 226 | #if HAVE_TABLE && defined TBL_VMSTATS |
| 227 | { /* This works on Tru64 UNIX V4/5. */ |
| 228 | struct tbl_vmstats vmstats; |
| 229 | |
| 230 | if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1) |
| 231 | { |
| 232 | double pages = vmstats.free_count; |
| 233 | double pagesize = vmstats.pagesize; |
| 234 | |
| 235 | if (0 <= pages && 0 <= pagesize) |
| 236 | return pages * pagesize; |
| 237 | } |
| 238 | } |
| 239 | #endif |
| 240 | |
| 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 }; |
| 246 | |
| 247 | if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0 |
| 248 | && len == sizeof (usermem)) |
| 249 | return (double) usermem; |
| 250 | } |
| 251 | #endif |
| 252 | |
| 253 | #if defined _WIN32 |
| 254 | { /* this works on windows */ |
| 255 | PFN_MS_EX pfnex; |
| 256 | HMODULE h = GetModuleHandle ("kernel32.dll"); |
| 257 | |
| 258 | if (!h) |
| 259 | return 0.0; |
| 260 | |
| 261 | /* Use GlobalMemoryStatusEx if available. */ |
| 262 | if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx"))) |
| 263 | { |
| 264 | lMEMORYSTATUSEX lms_ex; |
| 265 | lms_ex.dwLength = sizeof lms_ex; |
| 266 | if (!pfnex (&lms_ex)) |
| 267 | return 0.0; |
| 268 | return (double) lms_ex.ullAvailPhys; |
| 269 | } |
| 270 | |
| 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; |
| 278 | } |
| 279 | } |
| 280 | #endif |
| 281 | |
| 282 | /* Guess 25% of physical memory. */ |
| 283 | return physmem_total () / 4; |
| 284 | } |
| 285 | |
| 286 | |
| 287 | #if DEBUG |
| 288 | |
| 289 | # include <stdio.h> |
| 290 | # include <stdlib.h> |
| 291 | |
| 292 | int |
| 293 | main (void) |
| 294 | { |
| 295 | printf ("%12.f %12.f\n", physmem_total (), physmem_available ()); |
| 296 | exit (0); |
| 297 | } |
| 298 | |
| 299 | #endif /* DEBUG */ |
| 300 | |
| 301 | /* |
| 302 | Local Variables: |
| 303 | compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c" |
| 304 | End: |
| 305 | */ |