1 |
|
/* Calculate the size of physical memory. |
2 |
– |
Copyright 2000, 2001, 2003 Free Software Foundation, Inc. |
2 |
|
|
3 |
< |
This program is free software; you can redistribute it and/or modify |
3 |
> |
Copyright (C) 2000, 2001, 2003, 2005, 2006 Free Software |
4 |
> |
Foundation, Inc. |
5 |
> |
|
6 |
> |
This program is free software: you can redistribute it and/or modify |
7 |
|
it under the terms of the GNU General Public License as published by |
8 |
< |
the Free Software Foundation; either version 2, or (at your option) |
9 |
< |
any later version. |
8 |
> |
the Free Software Foundation; either version 3 of the License, or |
9 |
> |
(at your option) any later version. |
10 |
|
|
11 |
|
This program is distributed in the hope that it will be useful, |
12 |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
|
GNU General Public License for more details. |
15 |
|
|
16 |
|
You should have received a copy of the GNU General Public License |
17 |
< |
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 |
> |
along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
18 |
|
|
19 |
|
/* Written by Paul Eggert. */ |
20 |
|
|
21 |
|
#include "config.h" |
22 |
|
|
23 |
< |
#if HAVE_UNISTD_H |
23 |
< |
# include <unistd.h> |
24 |
< |
#endif |
23 |
> |
#include "physmem.h" |
24 |
|
|
25 |
+ |
#include <unistd.h> |
26 |
+ |
|
27 |
|
#if HAVE_SYS_PSTAT_H |
28 |
|
# include <sys/pstat.h> |
29 |
|
#endif |
75 |
|
typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*); |
76 |
|
#endif |
77 |
|
|
78 |
+ |
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
79 |
+ |
|
80 |
|
/* Return the total amount of physical memory. */ |
81 |
|
double |
82 |
< |
physmem_total () |
82 |
> |
physmem_total (void) |
83 |
|
{ |
84 |
|
#if defined _SC_PHYS_PAGES && defined _SC_PAGESIZE |
85 |
|
{ /* This works on linux-gnu, solaris2 and cygwin. */ |
137 |
|
size_t len = sizeof physmem; |
138 |
|
static int mib[2] = { CTL_HW, HW_PHYSMEM }; |
139 |
|
|
140 |
< |
if (sysctl (mib, 2, &physmem, &len, NULL, 0) == 0 |
140 |
> |
if (sysctl (mib, ARRAY_SIZE (mib), &physmem, &len, NULL, 0) == 0 |
141 |
|
&& len == sizeof (physmem)) |
142 |
|
return (double) physmem; |
143 |
|
} |
177 |
|
} |
178 |
|
#endif |
179 |
|
|
180 |
< |
/* Return 0 if we can't determine the value. */ |
181 |
< |
return 0; |
180 |
> |
/* Guess 64 MB. It's probably an older host, so guess small. */ |
181 |
> |
return 64 * 1024 * 1024; |
182 |
|
} |
183 |
|
|
184 |
|
/* Return the amount of physical memory available. */ |
185 |
|
double |
186 |
< |
physmem_available () |
186 |
> |
physmem_available (void) |
187 |
|
{ |
188 |
|
#if defined _SC_AVPHYS_PAGES && defined _SC_PAGESIZE |
189 |
|
{ /* This works on linux-gnu, solaris2 and cygwin. */ |
243 |
|
size_t len = sizeof usermem; |
244 |
|
static int mib[2] = { CTL_HW, HW_USERMEM }; |
245 |
|
|
246 |
< |
if (sysctl (mib, 2, &usermem, &len, NULL, 0) == 0 |
246 |
> |
if (sysctl (mib, ARRAY_SIZE (mib), &usermem, &len, NULL, 0) == 0 |
247 |
|
&& len == sizeof (usermem)) |
248 |
|
return (double) usermem; |
249 |
|
} |