libc/sysdeps/linux/sparc64/bits/sem.h

   1 /* Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
   2
   3    The GNU C Library is free software; you can redistribute it and/or
   4    modify it under the terms of the GNU Lesser General Public
   5    License as published by the Free Software Foundation; either
   6    version 2.1 of the License, or (at your option) any later version.
   7
   8    The GNU C Library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Lesser General Public License for more details.
  12
  13    You should have received a copy of the GNU Lesser General Public
  14    License along with the GNU C Library; if not, see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _SYS_SEM_H
  18 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
  19 #endif
  20
  21 #include <sys/types.h>
  22
  23 /* Flags for `semop'.  */
  24 #define SEM_UNDO        0x1000          /* undo the operation on exit */
  25
  26 /* Commands for `semctl'.  */
  27 #define GETPID          11              /* get sempid */
  28 #define GETVAL          12              /* get semval */
  29 #define GETALL          13              /* get all semval's */
  30 #define GETNCNT         14              /* get semncnt */
  31 #define GETZCNT         15              /* get semzcnt */
  32 #define SETVAL          16              /* set semval */
  33 #define SETALL          17              /* set all semval's */
  34
  35
  36 /* Data structure describing a set of semaphores.  */
  37 struct semid_ds
  38 {
  39   struct ipc_perm sem_perm;             /* operation permission struct */
  40   __time_t sem_otime;                   /* last semop() time */
  41   __time_t sem_ctime;                   /* last time changed by semctl() */
  42   unsigned long int sem_nsems;          /* number of semaphores in set */
  43   unsigned long int __unused1;
  44   unsigned long int __unused2;
  45 };
  46
  47 /* The user should define a union like the following to use it for arguments
  48    for `semctl'.
  49
  50    union semun
  51    {
  52      int val;                           <= value for SETVAL
  53      struct semid_ds *buf;              <= buffer for IPC_STAT & IPC_SET
  54      unsigned short int *array;         <= array for GETALL & SETALL
  55      struct seminfo *__buf;             <= buffer for IPC_INFO
  56    };
  57
  58    Previous versions of this file used to define this union but this is
  59    incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
  60    one must define the union or not.  */
  61 #define _SEM_SEMUN_UNDEFINED    1
  62
  63 #ifdef __USE_MISC
  64
  65 /* ipcs ctl cmds */
  66 # define SEM_STAT 18
  67 # define SEM_INFO 19
  68
  69 struct  seminfo
  70 {
  71   int semmap;
  72   int semmni;
  73   int semmns;
  74   int semmnu;
  75   int semmsl;
  76   int semopm;
  77   int semume;
  78   int semusz;
  79   int semvmx;
  80   int semaem;
  81 };
  82
  83 #endif /* __USE_MISC */