sysdeps/unix/sysv/linux/ia64/bits/sem.h

   1 /* Copyright (C) 2000
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4         Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _SYS_SEM_H
  21 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
  22 #endif
  23
  24 #include <sys/types.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   __time_t sem_otime;                   /* last semop() time */
  44   __time_t sem_ctime;                   /* last time changed by semctl() */
  45   unsigned long int sem_nsems;          /* number of semaphores in set */
  46   unsigned long int __unused1;
  47   unsigned long int __unused2;
  48 };
  49
  50 /* The user should define a union like the following to use it for arguments
  51    for `semctl'.
  52
  53    union semun
  54    {
  55      int val;                           <= value for SETVAL
  56      struct semid_ds *buf;              <= buffer for IPC_STAT & IPC_SET
  57      unsigned short int *array;         <= array for GETALL & SETALL
  58      struct seminfo *__buf;             <= buffer for IPC_INFO
  59    };
  60
  61    Previous versions of this file used to define this union but this is
  62    incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
  63    one must define the union or not.  */
  64 #define _SEM_SEMUN_UNDEFINED    1
  65
  66 #ifdef __USE_MISC
  67
  68 /* ipcs ctl cmds */
  69 # define SEM_STAT 18
  70 # define SEM_INFO 19
  71
  72 struct  seminfo
  73 {
  74   int semmap;
  75   int semmni;
  76   int semmns;
  77   int semmnu;
  78   int semmsl;
  79   int semopm;
  80   int semume;
  81   int semusz;
  82   int semvmx;
  83   int semaem;
  84 };
  85
  86 #endif /* __USE_MISC */