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01: /* Copyright (C) 2002, 2011 Free Software Foundation, Inc.
02:    This file is part of the GNU C Library.
03: 
04:    The GNU C Library is free software; you can redistribute it and/or
05:    modify it under the terms of the GNU Lesser General Public
06:    License as published by the Free Software Foundation; either
07:    version 2.1 of the License, or (at your option) any later version.
08: 
09:    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, write to the Free
16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17:    02111-1307 USA.  */
18: 
19: #ifndef _SYS_SEM_H
20: # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
21: #endif
22: 
23: #include <sys/types.h>
24: 
25: /* Flags for `semop'.  */
26: #define SEM_UNDO        0x1000          /* undo the operation on exit */
27: 
28: /* Commands for `semctl'.  */
29: #define GETPID          11              /* get sempid */
30: #define GETVAL          12              /* get semval */
31: #define GETALL          13              /* get all semval's */
32: #define GETNCNT         14              /* get semncnt */
33: #define GETZCNT         15              /* get semzcnt */
34: #define SETVAL          16              /* set semval */
35: #define SETALL          17              /* set all semval's */
36: 
37: 
38: /* Data structure describing a set of semaphores.  */
39: struct semid_ds
40: {
41:   struct ipc_perm sem_perm;             /* operation permission struct */
42:   __time_t sem_otime;                   /* last semop() time */
43:   unsigned long int __unused1;
44:   __time_t sem_ctime;                   /* last time changed by semctl() */
45:   unsigned long int __unused2;
46:   unsigned long int sem_nsems;          /* number of semaphores in set */
47:   unsigned long int __unused3;
48:   unsigned long int __unused4;
49: };
50: 
51: /* The user should define a union like the following to use it for arguments
52:    for `semctl'.
53: 
54:    union semun
55:    {
56:      int val;                           <= value for SETVAL
57:      struct semid_ds *buf;              <= buffer for IPC_STAT & IPC_SET
58:      unsigned short int *array;         <= array for GETALL & SETALL
59:      struct seminfo *__buf;             <= buffer for IPC_INFO
60:    };
61: 
62:    Previous versions of this file used to define this union but this is
63:    incorrect.  One can test the macro _SEM_SEMUN_UNDEFINED to see whether
64:    one must define the union or not.  */
65: #define _SEM_SEMUN_UNDEFINED    1
66: 
67: #ifdef __USE_MISC
68: 
69: /* ipcs ctl cmds */
70: # define SEM_STAT 18
71: # define SEM_INFO 19
72: 
73: struct  seminfo
74: {
75:   int semmap;
76:   int semmni;
77:   int semmns;
78:   int semmnu;
79:   int semmsl;
80:   int semopm;
81:   int semume;
82:   int semusz;
83:   int semvmx;
84:   int semaem;
85: };
86: 
87: #endif /* __USE_MISC */
88: 

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