sem.h revision 363466 
1/*
2 * Copyright (c) 2000-2001, 2005, 2008 Proofpoint, Inc. and its suppliers.
3 *      All rights reserved.
4 *
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
8 *
9 *	$Id: sem.h,v 1.11 2013-11-22 20:51:31 ca Exp $
10 */
11
12#ifndef SM_SEM_H
13# define SM_SEM_H 1
14
15#include <sm/gen.h>
16
17/* key for semaphores */
18# define SM_SEM_KEY	(41L)
19# define SM_SEM_NO_ID	(-1)
20# define SM_NO_SEM(id)	((id) < 0)
21
22# if SM_CONF_SEM > 0
23#  include <sys/types.h>
24#  include <sys/ipc.h>
25#  include <sys/sem.h>
26
27# if SM_CONF_SEM == 2
28union semun
29{
30	int		val;
31	struct semid_ds	*buf;
32	ushort		*array;
33};
34# endif /* SM_CONF_SEM == 2 */
35
36# ifndef SEM_A
37#  define SEM_A	0200
38# endif
39# ifndef SEM_R
40#  define SEM_R	0400
41# endif
42
43# define SM_NSEM	1
44
45extern int sm_sem_start __P((key_t, int, int, bool));
46extern int sm_sem_stop __P((int));
47extern int sm_sem_acq __P((int, int, int));
48extern int sm_sem_rel __P((int, int, int));
49extern int sm_sem_get __P((int, int));
50extern int sm_semsetowner __P((int, uid_t, gid_t, mode_t));
51
52# else /* SM_CONF_SEM > 0 */
53#  define sm_sem_start(key, nsem, semflg, owner) 0
54#  define sm_sem_stop(semid)	0
55#  define sm_sem_acq(semid, semnum, timeout)	0
56#  define sm_sem_rel(semid, semnum, timeout)	0
57#  define sm_sem_get(semid, semnum)	0
58# endif /* SM_CONF_SEM > 0 */
59
60#endif /* ! SM_SEM_H */
61