text: /* Copyright (C) 2000
     Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
  
  #ifndef _SYS_SEM_H
  # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
  #endif
  
  #include <sys/types.h>
  
  /* Flags for `semop'.  */
  #define SEM_UNDO	0x1000		/* undo the operation on exit */
  
  /* Commands for `semctl'.  */
  #define GETPID		11		/* get sempid */
  #define GETVAL		12		/* get semval */
  #define GETALL		13		/* get all semval's */
  #define GETNCNT		14		/* get semncnt */
  #define GETZCNT		15		/* get semzcnt */
  #define SETVAL		16		/* set semval */
  #define SETALL		17		/* set all semval's */
  
  
  /* Data structure describing a set of semaphores.  */
  struct semid_ds
  {
    struct ipc_perm sem_perm;		/* operation permission struct */
    __time_t sem_otime;			/* last semop() time */
    __time_t sem_ctime;			/* last time changed by semctl() */
    unsigned long int sem_nsems;		/* number of semaphores in set */
    unsigned long int __unused1;
    unsigned long int __unused2;
  };
  
  /* The user should define a union like the following to use it for arguments
     for `semctl'.
  
     union semun
     {
       int val;				<= value for SETVAL
       struct semid_ds *buf;		<= buffer for IPC_STAT & IPC_SET
       unsigned short int *array;		<= array for GETALL & SETALL
       struct seminfo *__buf;		<= buffer for IPC_INFO
     };
  
     Previous versions of this file used to define this union but this is
     incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
     one must define the union or not.  */
  #define _SEM_SEMUN_UNDEFINED	1
  
  #ifdef __USE_MISC
  
  /* ipcs ctl cmds */
  # define SEM_STAT 18
  # define SEM_INFO 19
  
  struct  seminfo
  {
    int semmap;
    int semmni;
    int semmns;
    int semmnu;
    int semmsl;
    int semopm;
    int semume;
    int semusz;
    int semvmx;
    int semaem;
  };
  
  #endif /* __USE_MISC */
  