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comparison lib/physmem.c @ 4551:e98bdaad6174

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Merge in portability changes from gcc/libiberty to support AIX, IRIX, Tru64, and Windows. See the ChangeLog there for credits and details. Thanks to Kaveh Ghazi for helping to keep these files in sync. (ARRAY_SIZE): Define it. (physmem_total, physmem_available): Add comments. From Kaveh Ghazi.
author Paul Eggert <eggert@cs.ucla.edu>
date Fri, 15 Aug 2003 03:23:11 +0000
parents 0eb39272f531
children c7ad68a45173
comparison
equal deleted inserted replaced
4550:6070487cf52f 4551:e98bdaad6174
1 /* Calculate the size of physical memory. 1 /* Calculate the size of physical memory.
2 Copyright 2000, 2001 Free Software Foundation, Inc. 2 Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
3 3
4 This program is free software; you can redistribute it and/or modify 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 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) 6 the Free Software Foundation; either version 2, or (at your option)
7 any later version. 7 any later version.
29 29
30 #if HAVE_SYS_PSTAT_H 30 #if HAVE_SYS_PSTAT_H
31 # include <sys/pstat.h> 31 # include <sys/pstat.h>
32 #endif 32 #endif
33 33
34 #if HAVE_SYS_SYSMP_H
35 # include <sys/sysmp.h>
36 #endif
37
38 #if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
39 # include <sys/sysinfo.h>
40 # include <machine/hal_sysinfo.h>
41 #endif
42
43 #if HAVE_SYS_TABLE_H
44 # include <sys/table.h>
45 #endif
46
47 #include <sys/types.h>
48
49 #if HAVE_SYS_PARAM_H
50 # include <sys/param.h>
51 #endif
52
53 #if HAVE_SYS_SYSCTL_H
54 # include <sys/sysctl.h>
55 #endif
56
57 #if HAVE_SYS_SYSTEMCFG_H
58 # include <sys/systemcfg.h>
59 #endif
60
61 #ifdef _WIN32
62 # define WIN32_LEAN_AND_MEAN
63 # include <windows.h>
64 /* MEMORYSTATUSEX is missing from older windows headers, so define
65 a local replacement. */
66 typedef struct
67 {
68 DWORD dwLength;
69 DWORD dwMemoryLoad;
70 DWORDLONG ullTotalPhys;
71 DWORDLONG ullAvailPhys;
72 DWORDLONG ullTotalPageFile;
73 DWORDLONG ullAvailPageFile;
74 DWORDLONG ullTotalVirtual;
75 DWORDLONG ullAvailVirtual;
76 DWORDLONG ullAvailExtendedVirtual;
77 } lMEMORYSTATUSEX;
78 typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
79 #endif
80
81 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
82
34 /* Return the total amount of physical memory. */ 83 /* Return the total amount of physical memory. */
35 double 84 double
36 physmem_total (void) 85 physmem_total ()
37 { 86 {
38 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE 87 #if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
39 { 88 { /* This works on linux-gnu, solaris2 and cygwin. */
40 double pages = sysconf (_SC_PHYS_PAGES); 89 double pages = sysconf (_SC_PHYS_PAGES);
41 double pagesize = sysconf (_SC_PAGESIZE); 90 double pagesize = sysconf (_SC_PAGESIZE);
42 if (0 <= pages && 0 <= pagesize) 91 if (0 <= pages && 0 <= pagesize)
43 return pages * pagesize; 92 return pages * pagesize;
44 } 93 }
45 #endif 94 #endif
46 95
47 #if HAVE_PSTAT_GETSTATIC 96 #if HAVE_PSTAT_GETSTATIC
48 { 97 { /* This works on hpux11. */
49 struct pst_static pss; 98 struct pst_static pss;
50 if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)) 99 if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
51 { 100 {
52 double pages = pss.physical_memory; 101 double pages = pss.physical_memory;
53 double pagesize = pss.page_size; 102 double pagesize = pss.page_size;
54 if (0 <= pages && 0 <= pagesize) 103 if (0 <= pages && 0 <= pagesize)
55 return pages * pagesize; 104 return pages * pagesize;
105 }
106 }
107 #endif
108
109 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
110 { /* This works on irix6. */
111 struct rminfo realmem;
112 if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
113 {
114 double pagesize = sysconf (_SC_PAGESIZE);
115 double pages = realmem.physmem;
116 if (0 <= pages && 0 <= pagesize)
117 return pages * pagesize;
118 }
119 }
120 #endif
121
122 #if HAVE_GETSYSINFO && defined GSI_PHYSMEM
123 { /* This works on Tru64 UNIX V4/5. */
124 int physmem;
125
126 if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
127 NULL, NULL, NULL) == 1)
128 {
129 double kbytes = physmem;
130
131 if (0 <= kbytes)
132 return kbytes * 1024.0;
133 }
134 }
135 #endif
136
137 #if HAVE_SYSCTL && defined HW_PHYSMEM
138 { /* This works on *bsd and darwin. */
139 unsigned int physmem;
140 size_t len = sizeof physmem;
141 static int mib[2] = { CTL_HW, HW_PHYSMEM };
142
143 if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0
144 && len == sizeof (physmem))
145 return (double) physmem;
146 }
147 #endif
148
149 #if HAVE__SYSTEM_CONFIGURATION
150 /* This works on AIX. */
151 return _system_configuration.physmem;
152 #endif
153
154 #if defined _WIN32
155 { /* this works on windows */
156 PFN_MS_EX pfnex;
157 HMODULE h = GetModuleHandle ("kernel32.dll");
158
159 if (!h)
160 return 0.0;
161
162 /* Use GlobalMemoryStatusEx if available. */
163 if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
164 {
165 lMEMORYSTATUSEX lms_ex;
166 lms_ex.dwLength = sizeof lms_ex;
167 if (!pfnex (&lms_ex))
168 return 0.0;
169 return (double) lms_ex.ullTotalPhys;
170 }
171
172 /* Fall back to GlobalMemoryStatus which is always available.
173 but returns wrong results for physical memory > 4GB. */
174 else
175 {
176 MEMORYSTATUS ms;
177 GlobalMemoryStatus (&ms);
178 return (double) ms.dwTotalPhys;
56 } 179 }
57 } 180 }
58 #endif 181 #endif
59 182
60 /* Guess 64 MB. It's probably an older host, so guess small. */ 183 /* Guess 64 MB. It's probably an older host, so guess small. */
61 return 64 * 1024 * 1024; 184 return 64 * 1024 * 1024;
62 } 185 }
63 186
64 /* Return the amount of physical memory available. */ 187 /* Return the amount of physical memory available. */
65 double 188 double
66 physmem_available (void) 189 physmem_available ()
67 { 190 {
68 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE 191 #if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
69 { 192 { /* This works on linux-gnu, solaris2 and cygwin. */
70 double pages = sysconf (_SC_AVPHYS_PAGES); 193 double pages = sysconf (_SC_AVPHYS_PAGES);
71 double pagesize = sysconf (_SC_PAGESIZE); 194 double pagesize = sysconf (_SC_PAGESIZE);
72 if (0 <= pages && 0 <= pagesize) 195 if (0 <= pages && 0 <= pagesize)
73 return pages * pagesize; 196 return pages * pagesize;
74 } 197 }
75 #endif 198 #endif
76 199
77 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC 200 #if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
78 { 201 { /* This works on hpux11. */
79 struct pst_static pss; 202 struct pst_static pss;
80 struct pst_dynamic psd; 203 struct pst_dynamic psd;
81 if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0) 204 if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
82 && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0)) 205 && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
83 { 206 {
87 return pages * pagesize; 210 return pages * pagesize;
88 } 211 }
89 } 212 }
90 #endif 213 #endif
91 214
215 #if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
216 { /* This works on irix6. */
217 struct rminfo realmem;
218 if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
219 {
220 double pagesize = sysconf (_SC_PAGESIZE);
221 double pages = realmem.availrmem;
222 if (0 <= pages && 0 <= pagesize)
223 return pages * pagesize;
224 }
225 }
226 #endif
227
228 #if HAVE_TABLE && defined TBL_VMSTATS
229 { /* This works on Tru64 UNIX V4/5. */
230 struct tbl_vmstats vmstats;
231
232 if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
233 {
234 double pages = vmstats.free_count;
235 double pagesize = vmstats.pagesize;
236
237 if (0 <= pages && 0 <= pagesize)
238 return pages * pagesize;
239 }
240 }
241 #endif
242
243 #if HAVE_SYSCTL && defined HW_USERMEM
244 { /* This works on *bsd and darwin. */
245 unsigned int usermem;
246 size_t len = sizeof usermem;
247 static int mib[2] = { CTL_HW, HW_USERMEM };
248
249 if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
250 && len == sizeof (usermem))
251 return (double) usermem;
252 }
253 #endif
254
255 #if defined _WIN32
256 { /* this works on windows */
257 PFN_MS_EX pfnex;
258 HMODULE h = GetModuleHandle ("kernel32.dll");
259
260 if (!h)
261 return 0.0;
262
263 /* Use GlobalMemoryStatusEx if available. */
264 if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
265 {
266 lMEMORYSTATUSEX lms_ex;
267 lms_ex.dwLength = sizeof lms_ex;
268 if (!pfnex (&lms_ex))
269 return 0.0;
270 return (double) lms_ex.ullAvailPhys;
271 }
272
273 /* Fall back to GlobalMemoryStatus which is always available.
274 but returns wrong results for physical memory > 4GB */
275 else
276 {
277 MEMORYSTATUS ms;
278 GlobalMemoryStatus (&ms);
279 return (double) ms.dwAvailPhys;
280 }
281 }
282 #endif
283
92 /* Guess 25% of physical memory. */ 284 /* Guess 25% of physical memory. */
93 return physmem_total () / 4; 285 return physmem_total () / 4;
94 } 286 }
287
288
289 #if DEBUG
290
291 # include <stdio.h>
292 # include <stdlib.h>
293
294 int
295 main ()
296 {
297 printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
298 exit (0);
299 }
300
301 #endif /* DEBUG */
302
303 /*
304 Local Variables:
305 compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
306 End:
307 */