locker.h
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _MAILUTILS_LOCKER_H
#define _MAILUTILS_LOCKER_H
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __P
# ifdef __STDC__
# define __P(args) args
# else
# define __P(args) ()
# endif
#endif /*__P */
struct _locker;
typedef struct _locker *locker_t;
extern int locker_create __P ((locker_t *, const char *filename,
size_t len, int flags));
extern void locker_destroy __P ((locker_t *));
#define MU_LOCKER_RDLOCK 0
#define MU_LOCKER_WRLOCK 1
/* locking flags */
#define MU_LOCKER_PID 1
#define MU_LOCKER_FCNTL 2
#define MU_LOCKER_TIME 4
#define MU_LOCKER_EXPIRE_TIME (5 * 60)
extern int locker_lock __P ((locker_t, int flag));
extern int locker_touchlock __P ((locker_t));
extern int locker_unlock __P ((locker_t));
#ifdef __cplusplus
}
#endif
#endif /* _MAILUTILS_MAILBOX_H */