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/*
* Copyright (c) 2000-2001, 2005 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* $Id: sem.h,v 1.9 2005/02/17 22:08:58 ca Exp $
*/
#ifndef SM_SEM_H
# define SM_SEM_H 1
#include <sm/gen.h>
/* key for semaphores */
# define SM_SEM_KEY (41L)
# define SM_SEM_NO_ID (-1)
# define SM_NO_SEM(id) ((id) < 0)
# if SM_CONF_SEM > 0
# include <sys/types.h>
# include <sys/ipc.h>
# include <sys/sem.h>
# if SM_CONF_SEM == 2
union semun
{
int val;
struct semid_ds *buf;
ushort *array;
};
# endif /* SM_CONF_SEM == 2 */
# ifndef SEM_A
# define SEM_A 0200
# endif /* SEM_A */
# ifndef SEM_R
# define SEM_R 0400
# endif /* SEM_R */
# define SM_NSEM 1
extern int sm_sem_start __P((key_t, int, int, bool));
extern int sm_sem_stop __P((int));
extern int sm_sem_acq __P((int, int, int));
extern int sm_sem_rel __P((int, int, int));
extern int sm_sem_get __P((int, int));
# else /* SM_CONF_SEM > 0 */
# define sm_sem_start(key, nsem, semflg, owner) 0
# define sm_sem_stop(semid) 0
# define sm_sem_acq(semid, semnum, timeout) 0
# define sm_sem_rel(semid, semnum, timeout) 0
# define sm_sem_get(semid, semnum) 0
# endif /* SM_CONF_SEM > 0 */
#endif /* ! SM_SEM_H */
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