sysdeps/unix/sysv/linux/sparc/bits/sem.h

   1 /* Copyright (C) 1995, 1996, 1997, 1998, 2000 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _SYS_SEM_H
  20 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
  21 #endif
  22
  23 #include <sys/types.h>
  24 #include <bits/wordsize.h>
  25
  26 /* Flags for `semop'.  */
  27 #define SEM_UNDO        0x1000          /* undo the operation on exit */
  28
  29 /* Commands for `semctl'.  */
  30 #define GETPID          11              /* get sempid */
  31 #define GETVAL          12              /* get semval */
  32 #define GETALL          13              /* get all semval's */
  33 #define GETNCNT         14              /* get semncnt */
  34 #define GETZCNT         15              /* get semzcnt */
  35 #define SETVAL          16              /* set semval */
  36 #define SETALL          17              /* set all semval's */
  37
  38
  39 /* Data structure describing a set of semaphores.  */
  40 struct semid_ds
  41 {
  42   struct ipc_perm sem_perm;             /* operation permission struct */
  43 #if __WORDSIZE == 32
  44   unsigned int __pad1;
  45 #endif
  46   __time_t sem_otime;                   /* last semop() time */
  47 #if __WORDSIZE == 32
  48   unsigned int __pad2;
  49 #endif
  50   __time_t sem_ctime;                   /* last time changed by semctl() */
  51   unsigned long int sem_nsems;          /* number of semaphores in set */
  52   unsigned long int __unused1;
  53   unsigned long int __unused2;
  54 };
  55
  56 /* The user should define a union like the following to use it for arguments
  57    for `semctl'.
  58
  59    union semun
  60    {
  61      int val;                           <= value for SETVAL
  62      struct semid_ds *buf;              <= buffer for IPC_STAT & IPC_SET
  63      unsigned short int *array;         <= array for GETALL & SETALL
  64      struct seminfo *__buf;             <= buffer for IPC_INFO
  65    };
  66
  67    Previous versions of this file used to define this union but this is
  68    incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
  69    one must define the union or not.  */
  70 #define _SEM_SEMUN_UNDEFINED    1
  71
  72 #ifdef __USE_MISC
  73
  74 /* ipcs ctl cmds */
  75 # define SEM_STAT 18
  76 # define SEM_INFO 19
  77
  78 struct  seminfo
  79 {
  80   int semmap;
  81   int semmni;
  82   int semmns;
  83   int semmnu;
  84   int semmsl;
  85   int semopm;
  86   int semume;
  87   int semusz;
  88   int semvmx;
  89   int semaem;
  90 };
  91
  92 #endif /* __USE_MISC */