physmem.c revision 261188 
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.  */
64typedef 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;
76typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
77#endif
78
79#include "libiberty.h"
80
81/* Return the total amount of physical memory.  */
82double
83physmem_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/* APPLE LOCAL begin retune gc params 6124839 */
186unsigned int
187ncpu_available (void)
188{
189#if HAVE_SYSCTL && defined HW_AVAILCPU
190  { /* This works on *bsd and darwin.  */
191    unsigned int ncpu;
192    size_t len = sizeof ncpu;
193    static int mib[2] = { CTL_HW, HW_AVAILCPU };
194
195    if (sysctl (mib, ARRAY_SIZE (mib), &ncpu, &len, NULL, 0) == 0
196	&& len == sizeof (ncpu))
197      return ncpu;
198  }
199#endif
200#if HAVE_SYSCTL && defined HW_NCPU
201  { /* This works on *bsd and darwin.  */
202    unsigned int ncpu;
203    size_t len = sizeof ncpu;
204    static int mib[2] = { CTL_HW, HW_NCPU };
205
206    if (sysctl (mib, ARRAY_SIZE (mib), &ncpu, &len, NULL, 0) == 0
207	&& len == sizeof (ncpu))
208      return ncpu;
209  }
210#endif
211  return 1;
212}
213/* APPLE LOCAL end retune gc params 6124839 */
214
215/* Return the amount of physical memory available.  */
216double
217physmem_available (void)
218{
219#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
220  { /* This works on linux-gnu, solaris2 and cygwin.  */
221    double pages = sysconf (_SC_AVPHYS_PAGES);
222    double pagesize = sysconf (_SC_PAGESIZE);
223    if (0 <= pages && 0 <= pagesize)
224      return pages * pagesize;
225  }
226#endif
227
228#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
229  { /* This works on hpux11.  */
230    struct pst_static pss;
231    struct pst_dynamic psd;
232    if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
233	&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
234      {
235	double pages = psd.psd_free;
236	double pagesize = pss.page_size;
237	if (0 <= pages && 0 <= pagesize)
238	  return pages * pagesize;
239      }
240  }
241#endif
242
243#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
244  { /* This works on irix6. */
245    struct rminfo realmem;
246    if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
247      {
248	double pagesize = sysconf (_SC_PAGESIZE);
249	double pages = realmem.availrmem;
250	if (0 <= pages && 0 <= pagesize)
251	  return pages * pagesize;
252      }
253  }
254#endif
255
256#if HAVE_TABLE && defined TBL_VMSTATS
257  { /* This works on Tru64 UNIX V4/5.  */
258    struct tbl_vmstats vmstats;
259
260    if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
261      {
262	double pages = vmstats.free_count;
263	double pagesize = vmstats.pagesize;
264
265	if (0 <= pages && 0 <= pagesize)
266	  return pages * pagesize;
267      }
268  }
269#endif
270
271#if HAVE_SYSCTL && defined HW_USERMEM
272  { /* This works on *bsd and darwin.  */
273    unsigned int usermem;
274    size_t len = sizeof usermem;
275    static int mib[2] = { CTL_HW, HW_USERMEM };
276
277    if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0
278	&& len == sizeof (usermem))
279      return (double) usermem;
280  }
281#endif
282
283#if defined _WIN32
284  { /* this works on windows */
285    PFN_MS_EX pfnex;
286    HMODULE h = GetModuleHandle ("kernel32.dll");
287
288    if (!h)
289      return 0.0;
290
291    /*  Use GlobalMemoryStatusEx if available.  */
292    if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
293      {
294	lMEMORYSTATUSEX lms_ex;
295	lms_ex.dwLength = sizeof lms_ex;
296	if (!pfnex (&lms_ex))
297	  return 0.0;
298	return (double) lms_ex.ullAvailPhys;
299      }
300
301    /*  Fall back to GlobalMemoryStatus which is always available.
302        but returns wrong results for physical memory > 4GB  */
303    else
304      {
305	MEMORYSTATUS ms;
306	GlobalMemoryStatus (&ms);
307	return (double) ms.dwAvailPhys;
308      }
309  }
310#endif
311
312  /* Guess 25% of physical memory.  */
313  return physmem_total () / 4;
314}
315
316
317#if DEBUG
318
319# include <stdio.h>
320# include <stdlib.h>
321
322int
323main (void)
324{
325  printf ("%12.f %12.f\n", physmem_total (), physmem_available ());
326  exit (0);
327}
328
329#endif /* DEBUG */
330
331/*
332Local Variables:
333compile-command: "gcc -DDEBUG -DHAVE_CONFIG_H -I.. -g -O -Wall -W physmem.c"
334End:
335*/
336