src/utils/physmem.c

/* Calculate the size of physical memory.
   Copyright 2000, 2001, 2003 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Written by Paul Eggert.  */

#include "config.h"

#if HAVE_UNISTD_H
# include <unistd.h>
#endif

#if HAVE_SYS_PSTAT_H
# include <sys/pstat.h>
#endif

#if HAVE_SYS_SYSMP_H
# include <sys/sysmp.h>
#endif

#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
# include <sys/sysinfo.h>
# include <machine/hal_sysinfo.h>
#endif

#if HAVE_SYS_TABLE_H
# include <sys/table.h>
#endif

#include <sys/types.h>

#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif

#if HAVE_SYS_SYSCTL_H
# include <sys/sysctl.h>
#endif

#if HAVE_SYS_SYSTEMCFG_H
# include <sys/systemcfg.h>
#endif

#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
/*  MEMORYSTATUSEX is missing from older windows headers, so define
    a local replacement.  */
typedef struct
{
  DWORD dwLength;
  DWORD dwMemoryLoad;
  DWORDLONG ullTotalPhys;
  DWORDLONG ullAvailPhys;
  DWORDLONG ullTotalPageFile;
  DWORDLONG ullAvailPageFile;
  DWORDLONG ullTotalVirtual;
  DWORDLONG ullAvailVirtual;
  DWORDLONG ullAvailExtendedVirtual;
} lMEMORYSTATUSEX;
typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
#endif

/* Return the total amount of physical memory.  */
double
physmem_total ()
{
#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
  { /* This works on linux-gnu, solaris2 and cygwin.  */
    double pages = sysconf (_SC_PHYS_PAGES);
    double pagesize = sysconf (_SC_PAGESIZE);
    if (0 <= pages && 0 <= pagesize)
      return pages * pagesize;
  }
#endif

#if HAVE_PSTAT_GETSTATIC
  { /* This works on hpux11.  */
    struct pst_static pss;
    if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
      {
        double pages = pss.physical_memory;
        double pagesize = pss.page_size;
        if (0 <= pages && 0 <= pagesize)
          return pages * pagesize;
      }
  }
#endif

#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
  { /* This works on irix6. */
    struct rminfo realmem;
    if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
      {
        double pagesize = sysconf (_SC_PAGESIZE);
        double pages = realmem.physmem;
        if (0 <= pages && 0 <= pagesize)
          return pages * pagesize;
      }
  }
#endif

#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
  { /* This works on Tru64 UNIX V4/5.  */
    int physmem;

    if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
                    NULL, NULL, NULL) == 1)
      {
        double kbytes = physmem;

        if (0 <= kbytes)
          return kbytes * 1024.0;
      }
  }
#endif

#if HAVE_SYSCTL && defined HW_PHYSMEM
  { /* This works on *bsd and darwin.  */
    unsigned int physmem;
    size_t len = sizeof physmem;
    static int mib[2] = { CTL_HW, HW_PHYSMEM };

    if (sysctl (mib, 2, &physmem, &len, NULL, 0) == 0
        && len == sizeof (physmem))
      return (double) physmem;
  }
#endif

#if HAVE__SYSTEM_CONFIGURATION
  /* This works on AIX.  */
  return _system_configuration.physmem;
#endif

#if defined _WIN32
  { /* this works on windows */
    PFN_MS_EX pfnex;
    HMODULE h = GetModuleHandle ("kernel32.dll");

    if (!h)
      return 0.0;

    /*  Use GlobalMemoryStatusEx if available.  */
    if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
      {
        lMEMORYSTATUSEX lms_ex;
        lms_ex.dwLength = sizeof lms_ex;
        if (!pfnex (&lms_ex))
          return 0.0;
        return (double) lms_ex.ullTotalPhys;
      }

    /*  Fall back to GlobalMemoryStatus which is always available.
        but returns wrong results for physical memory > 4GB.  */
    else
      {
        MEMORYSTATUS ms;
        GlobalMemoryStatus (&ms);
        return (double) ms.dwTotalPhys;
      }
  }
#endif

  /* Return 0 if we can't determine the value.  */
  return 0;
}

/* Return the amount of physical memory available.  */
double
physmem_available ()
{
#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
  { /* This works on linux-gnu, solaris2 and cygwin.  */
    double pages = sysconf (_SC_AVPHYS_PAGES);
    double pagesize = sysconf (_SC_PAGESIZE);
    if (0 <= pages && 0 <= pagesize)
      return pages * pagesize;
  }
#endif

#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
  { /* This works on hpux11.  */
    struct pst_static pss;
    struct pst_dynamic psd;
    if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
        && 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
      {
        double pages = psd.psd_free;
        double pagesize = pss.page_size;
        if (0 <= pages && 0 <= pagesize)
          return pages * pagesize;
      }
  }
#endif

#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
  { /* This works on irix6. */
    struct rminfo realmem;
    if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
      {
        double pagesize = sysconf (_SC_PAGESIZE);
        double pages = realmem.availrmem;
        if (0 <= pages && 0 <= pagesize)
          return pages * pagesize;
      }
  }
#endif

#if HAVE_TABLE && defined TBL_VMSTATS
  { /* This works on Tru64 UNIX V4/5.  */
    struct tbl_vmstats vmstats;

    if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
      {
        double pages = vmstats.free_count;
        double pagesize = vmstats.pagesize;

        if (0 <= pages && 0 <= pagesize)
          return pages * pagesize;
      }
  }
#endif

#if HAVE_SYSCTL && defined HW_USERMEM
  { /* This works on *bsd and darwin.  */
    unsigned int usermem;
    size_t len = sizeof usermem;
    static int mib[2] = { CTL_HW, HW_USERMEM };

    if (sysctl (mib, 2, &usermem, &len, NULL, 0) == 0
        && len == sizeof (usermem))
      return (double) usermem;
  }
#endif

#if defined _WIN32
  { /* this works on windows */
    PFN_MS_EX pfnex;
    HMODULE h = GetModuleHandle ("kernel32.dll");

    if (!h)
      return 0.0;

    /*  Use GlobalMemoryStatusEx if available.  */
    if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
      {
        lMEMORYSTATUSEX lms_ex;
        lms_ex.dwLength = sizeof lms_ex;
        if (!pfnex (&lms_ex))
          return 0.0;
        return (double) lms_ex.ullAvailPhys;
      }

    /*  Fall back to GlobalMemoryStatus which is always available.
        but returns wrong results for physical memory > 4GB  */
    else
      {
        MEMORYSTATUS ms;
        GlobalMemoryStatus (&ms);
        return (double) ms.dwAvailPhys;
      }
  }
#endif

  /* Guess 25% of physical memory.  */
  return physmem_total () / 4;
}

Revision:	1996
Committed:	Fri Feb 11 22:35:05 2005 UTC (20 years, 8 months ago) by tim
Content type:	text/plain
File size:	6941 byte(s)
Log Message:	adding physmem
#	User	Rev	Content
1	tim	1996	/* Calculate the size of physical memory.
2			Copyright 2000, 2001, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18			/* Written by Paul Eggert. */
19
20			#include "config.h"
21
22			#if HAVE_UNISTD_H
23			# include <unistd.h>
24			#endif
25
26			#if HAVE_SYS_PSTAT_H
27			# include <sys/pstat.h>
28			#endif
29
30			#if HAVE_SYS_SYSMP_H
31			# include <sys/sysmp.h>
32			#endif
33
34			#if HAVE_SYS_SYSINFO_H && HAVE_MACHINE_HAL_SYSINFO_H
35			# include <sys/sysinfo.h>
36			# include <machine/hal_sysinfo.h>
37			#endif
38
39			#if HAVE_SYS_TABLE_H
40			# include <sys/table.h>
41			#endif
42
43			#include <sys/types.h>
44
45			#if HAVE_SYS_PARAM_H
46			# include <sys/param.h>
47			#endif
48
49			#if HAVE_SYS_SYSCTL_H
50			# include <sys/sysctl.h>
51			#endif
52
53			#if HAVE_SYS_SYSTEMCFG_H
54			# include <sys/systemcfg.h>
55			#endif
56
57			#ifdef _WIN32
58			# define WIN32_LEAN_AND_MEAN
59			# include <windows.h>
60			/* MEMORYSTATUSEX is missing from older windows headers, so define
61			a local replacement. */
62			typedef struct
63			{
64			DWORD dwLength;
65			DWORD dwMemoryLoad;
66			DWORDLONG ullTotalPhys;
67			DWORDLONG ullAvailPhys;
68			DWORDLONG ullTotalPageFile;
69			DWORDLONG ullAvailPageFile;
70			DWORDLONG ullTotalVirtual;
71			DWORDLONG ullAvailVirtual;
72			DWORDLONG ullAvailExtendedVirtual;
73			} lMEMORYSTATUSEX;
74			typedef WINBOOL (WINAPI PFN_MS_EX) (lMEMORYSTATUSEX);
75			#endif
76
77			/* Return the total amount of physical memory. */
78			double
79			physmem_total ()
80			{
81			#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE
82			{ /* This works on linux-gnu, solaris2 and cygwin. */
83			double pages = sysconf (_SC_PHYS_PAGES);
84			double pagesize = sysconf (_SC_PAGESIZE);
85			if (0 <= pages && 0 <= pagesize)
86			return pages * pagesize;
87			}
88			#endif
89
90			#if HAVE_PSTAT_GETSTATIC
91			{ /* This works on hpux11. */
92			struct pst_static pss;
93			if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0))
94			{
95			double pages = pss.physical_memory;
96			double pagesize = pss.page_size;
97			if (0 <= pages && 0 <= pagesize)
98			return pages * pagesize;
99			}
100			}
101			#endif
102
103			#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
104			{ /* This works on irix6. */
105			struct rminfo realmem;
106			if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
107			{
108			double pagesize = sysconf (_SC_PAGESIZE);
109			double pages = realmem.physmem;
110			if (0 <= pages && 0 <= pagesize)
111			return pages * pagesize;
112			}
113			}
114			#endif
115
116			#if HAVE_GETSYSINFO && defined GSI_PHYSMEM
117			{ /* This works on Tru64 UNIX V4/5. */
118			int physmem;
119
120			if (getsysinfo (GSI_PHYSMEM, (caddr_t) &physmem, sizeof (physmem),
121			NULL, NULL, NULL) == 1)
122			{
123			double kbytes = physmem;
124
125			if (0 <= kbytes)
126			return kbytes * 1024.0;
127			}
128			}
129			#endif
130
131			#if HAVE_SYSCTL && defined HW_PHYSMEM
132			{ /* This works on bsd and darwin. /
133			unsigned int physmem;
134			size_t len = sizeof physmem;
135			static int mib[2] = { CTL_HW, HW_PHYSMEM };
136
137			if (sysctl (mib, 2, &physmem, &len, NULL, 0) == 0
138			&& len == sizeof (physmem))
139			return (double) physmem;
140			}
141			#endif
142
143			#if HAVE__SYSTEM_CONFIGURATION
144			/* This works on AIX. */
145			return _system_configuration.physmem;
146			#endif
147
148			#if defined _WIN32
149			{ /* this works on windows */
150			PFN_MS_EX pfnex;
151			HMODULE h = GetModuleHandle ("kernel32.dll");
152
153			if (!h)
154			return 0.0;
155
156			/* Use GlobalMemoryStatusEx if available. */
157			if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
158			{
159			lMEMORYSTATUSEX lms_ex;
160			lms_ex.dwLength = sizeof lms_ex;
161			if (!pfnex (&lms_ex))
162			return 0.0;
163			return (double) lms_ex.ullTotalPhys;
164			}
165
166			/* Fall back to GlobalMemoryStatus which is always available.
167			but returns wrong results for physical memory > 4GB. */
168			else
169			{
170			MEMORYSTATUS ms;
171			GlobalMemoryStatus (&ms);
172			return (double) ms.dwTotalPhys;
173			}
174			}
175			#endif
176
177			/* Return 0 if we can't determine the value. */
178			return 0;
179			}
180
181			/* Return the amount of physical memory available. */
182			double
183			physmem_available ()
184			{
185			#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE
186			{ /* This works on linux-gnu, solaris2 and cygwin. */
187			double pages = sysconf (_SC_AVPHYS_PAGES);
188			double pagesize = sysconf (_SC_PAGESIZE);
189			if (0 <= pages && 0 <= pagesize)
190			return pages * pagesize;
191			}
192			#endif
193
194			#if HAVE_PSTAT_GETSTATIC && HAVE_PSTAT_GETDYNAMIC
195			{ /* This works on hpux11. */
196			struct pst_static pss;
197			struct pst_dynamic psd;
198			if (0 <= pstat_getstatic (&pss, sizeof pss, 1, 0)
199			&& 0 <= pstat_getdynamic (&psd, sizeof psd, 1, 0))
200			{
201			double pages = psd.psd_free;
202			double pagesize = pss.page_size;
203			if (0 <= pages && 0 <= pagesize)
204			return pages * pagesize;
205			}
206			}
207			#endif
208
209			#if HAVE_SYSMP && defined MP_SAGET && defined MPSA_RMINFO && defined _SC_PAGESIZE
210			{ /* This works on irix6. */
211			struct rminfo realmem;
212			if (sysmp (MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0)
213			{
214			double pagesize = sysconf (_SC_PAGESIZE);
215			double pages = realmem.availrmem;
216			if (0 <= pages && 0 <= pagesize)
217			return pages * pagesize;
218			}
219			}
220			#endif
221
222			#if HAVE_TABLE && defined TBL_VMSTATS
223			{ /* This works on Tru64 UNIX V4/5. */
224			struct tbl_vmstats vmstats;
225
226			if (table (TBL_VMSTATS, 0, &vmstats, 1, sizeof (vmstats)) == 1)
227			{
228			double pages = vmstats.free_count;
229			double pagesize = vmstats.pagesize;
230
231			if (0 <= pages && 0 <= pagesize)
232			return pages * pagesize;
233			}
234			}
235			#endif
236
237			#if HAVE_SYSCTL && defined HW_USERMEM
238			{ /* This works on bsd and darwin. /
239			unsigned int usermem;
240			size_t len = sizeof usermem;
241			static int mib[2] = { CTL_HW, HW_USERMEM };
242
243			if (sysctl (mib, 2, &usermem, &len, NULL, 0) == 0
244			&& len == sizeof (usermem))
245			return (double) usermem;
246			}
247			#endif
248
249			#if defined _WIN32
250			{ /* this works on windows */
251			PFN_MS_EX pfnex;
252			HMODULE h = GetModuleHandle ("kernel32.dll");
253
254			if (!h)
255			return 0.0;
256
257			/* Use GlobalMemoryStatusEx if available. */
258			if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
259			{
260			lMEMORYSTATUSEX lms_ex;
261			lms_ex.dwLength = sizeof lms_ex;
262			if (!pfnex (&lms_ex))
263			return 0.0;
264			return (double) lms_ex.ullAvailPhys;
265			}
266
267			/* Fall back to GlobalMemoryStatus which is always available.
268			but returns wrong results for physical memory > 4GB */
269			else
270			{
271			MEMORYSTATUS ms;
272			GlobalMemoryStatus (&ms);
273			return (double) ms.dwAvailPhys;
274			}
275			}
276			#endif
277
278			/* Guess 25% of physical memory. */
279			return physmem_total () / 4;
280			}
281