include/sys/sem.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  24  *
  25  * Copyright 1997-2003 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  30 /*        All Rights Reserved   */
  31
  32
  33 #ifndef _SYS_SEM_H
  34 #define _SYS_SEM_H
  35
  36 #include <sys/ipc.h>
  37
  38 #ifdef  __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 /*
  43  * IPC Semaphore Facility.
  44  */
  45
  46 /*
  47  * Implementation Constants.
  48  */
  49
  50 /*
  51  * Permission Definitions.
  52  */
  53
  54 #define SEM_A   0200    /* alter permission */
  55 #define SEM_R   0400    /* read permission */
  56
  57 /*
  58  * Semaphore Operation Flags.
  59  */
  60
  61 #define SEM_UNDO        010000  /* set up adjust on exit entry */
  62
  63 /*
  64  * Semctl Command Definitions.
  65  */
  66
  67 #define GETNCNT 3       /* get semncnt */
  68 #define GETPID  4       /* get sempid */
  69 #define GETVAL  5       /* get semval */
  70 #define GETALL  6       /* get all semval's */
  71 #define GETZCNT 7       /* get semzcnt */
  72 #define SETVAL  8       /* set semval */
  73 #define SETALL  9       /* set all semval's */
  74
  75 /*
  76  * Structure Definitions.
  77  */
  78
  79 struct semid_ds {
  80         struct ipc_perm sem_perm;       /* operation permission struct */
  81         struct sem      *sem_base;      /* ptr to first semaphore in set */
  82         ushort_t        sem_nsems;      /* # of semaphores in set */
  83 #if defined(_LP64)
  84         time_t          sem_otime;      /* last semop time */
  85         time_t          sem_ctime;      /* last change time */
  86 #else   /* _LP64 */
  87         time_t          sem_otime;      /* last semop time */
  88         int32_t         sem_pad1;       /* reserved for time_t expansion */
  89         time_t          sem_ctime;      /* last change time */
  90         int32_t         sem_pad2;       /* time_t expansion */
  91 #endif  /* _LP64 */
  92         int             sem_binary;     /* flag indicating semaphore type */
  93         long            sem_pad3[3];    /* reserve area */
  94 };
  95
  96 /*
  97  * User semaphore template for semop system calls.
  98  */
  99 struct sembuf {
 100         ushort_t        sem_num;        /* semaphore # */
 101         short           sem_op;         /* semaphore operation */
 102         short           sem_flg;        /* operation flags */
 103 };
 104
 105 #if !defined(_KERNEL)
 106 int semctl(int, int, int, ...);
 107 int semget(key_t, int, int);
 108 int semids(int *, uint_t, uint_t *);
 109 int semop(int, struct sembuf *, size_t);
 110 #if defined(__EXTENSIONS__) || !defined(_XOPEN_SOURCE)
 111 int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
 112 #endif
 113 #endif /* ! _KERNEL */
 114
 115 #ifdef  __cplusplus
 116 }
 117 #endif
 118
 119 #endif  /* _SYS_SEM_H */