include/sys/sysinfo.h

   1 /* Copyright (C) 1996, 1999, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_SYSINFO_H
  19 #define _SYS_SYSINFO_H  1
  20
  21 #include <features.h>
  22
  23 #ifndef _LINUX_KERNEL_H
  24 /* Include our own copy of struct sysinfo to avoid binary compatability
  25  * problems with Linux 2.4, which changed things.  Grumble, grumble. */
  26 #define _LINUX_SYSINFO_H
  27
  28 #define SI_LOAD_SHIFT   16
  29 struct sysinfo {
  30         long uptime;                    /* Seconds since boot */
  31         unsigned long loads[3];         /* 1, 5, and 15 minute load averages */
  32         unsigned long totalram;         /* Total usable main memory size */
  33         unsigned long freeram;          /* Available memory size */
  34         unsigned long sharedram;        /* Amount of shared memory */
  35         unsigned long bufferram;        /* Memory used by buffers */
  36         unsigned long totalswap;        /* Total swap space size */
  37         unsigned long freeswap;         /* swap space still available */
  38         unsigned short procs;           /* Number of current processes */
  39         unsigned short pad;                     /* Padding needed for m68k */
  40         unsigned long totalhigh;        /* Total high memory size */
  41         unsigned long freehigh;         /* Available high memory size */
  42         unsigned int mem_unit;          /* Memory unit size in bytes */
  43         char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
  44 };
  45 #endif
  46
  47 __BEGIN_DECLS
  48
  49 /* Returns information on overall system statistics.  */
  50 extern int sysinfo (struct sysinfo *__info) __THROW;
  51
  52 /* Return number of configured processors.  */
  53 #define get_nprocs_conf() (sysconf(_SC_NPROCESSORS_CONF))
  54
  55 /* Return number of available processors.  */
  56 #define get_nprocs() (sysconf(_SC_NPROCESSORS_ONLN))
  57
  58
  59 /* Return number of physical pages of memory in the system.  */
  60 extern long int get_phys_pages (void) __THROW;
  61
  62 /* Return number of available physical pages of memory in the system.  */
  63 extern long int get_avphys_pages (void) __THROW;
  64
  65 __END_DECLS
  66
  67 #endif  /* sys/sysinfo.h */