Mercurial > hg > CbC > CbC_gcc
comparison libiberty/physmem.c @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 04ced10e8804 |
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1 /* Calculate the size of physical memory. | |
2 Copyright 2000, 2001, 2003, 2004, 2005 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 */ |