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

   1 /* Copyright (C) 1995-2014 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_SEM_H
  19 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 /* Flags for `semop'.  */
  25 #define SEM_UNDO       0x1000          /* undo the operation on exit */
  26
  27 /* Commands for `semctl'.  */
  28 #define GETPID         11              /* get sempid */
  29 #define GETVAL         12              /* get semval */
  30 #define GETALL         13              /* get all semval's */
  31 #define GETNCNT                14              /* get semncnt */
  32 #define GETZCNT                15              /* get semzcnt */
  33 #define SETVAL         16              /* set semval */
  34 #define SETALL         17              /* set all semval's */
  35
  36
  37 /* Data structure describing a set of semaphores.  */
  38 struct semid_ds
  39 {
  40   struct ipc_perm sem_perm;            /* operation permission struct */
  41 #if __WORDSIZE == 32
  42   unsigned int __glibc_reserved1;
  43 #endif
  44   __time_t sem_otime;                  /* last semop() time */
  45 #if __WORDSIZE == 32
  46   unsigned int __glibc_reserved2;
  47 #endif
  48   __time_t sem_ctime;                  /* last time changed by semctl() */
  49   unsigned long int sem_nsems;         /* number of semaphores in set */
  50   unsigned long __glibc_reserved3;
  51   unsigned long __glibc_reserved4;
  52 };
  53
  54 /* The user should define a union like the following to use it for arguments
  55    for `semctl'.
  56
  57    union semun
  58    {
  59      int val;                          <= value for SETVAL
  60      struct semid_ds *buf;             <= buffer for IPC_STAT & IPC_SET
  61      unsigned short int *array;                <= array for GETALL & SETALL
  62      struct seminfo *__buf;            <= buffer for IPC_INFO
  63    };
  64
  65    Previous versions of this file used to define this union but this is
  66    incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
  67    one must define the union or not.  */
  68 #define _SEM_SEMUN_UNDEFINED   1
  69
  70 #ifdef __USE_MISC
  71
  72 /* ipcs ctl cmds */
  73 # define SEM_STAT 18
  74 # define SEM_INFO 19
  75
  76 struct  seminfo
  77 {
  78   int semmap;
  79   int semmni;
  80   int semmns;
  81   int semmnu;
  82   int semmsl;
  83   int semopm;
  84   int semume;
  85   int semusz;
  86   int semvmx;
  87   int semaem;
  88 };
  89
  90 #endif /* __USE_MISC */