1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* Copyright (c) 1998-2001, 2004 Sendmail, Inc. and its suppliers.
* All rights reserved.
* Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
* Copyright (c) 1988, 1993
* The Regents of the University of California. 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: clock.h,v 1.12 2004/08/03 19:57:21 ca Exp $
*/
/*
** CLOCK.H -- for co-ordinating timed events
*/
#ifndef _SM_CLOCK_H
# define _SM_CLOCK_H 1
# include <sm/signal.h>
# if SM_CONF_SETITIMER
# include <sys/time.h>
# endif /* SM_CONF_SETITIMER */
/*
** STRUCT SM_EVENT -- event queue.
**
** Maintained in sorted order.
**
** We store the pid of the process that set this event to insure
** that when we fork we will not take events intended for the parent.
*/
struct sm_event
{
# if SM_CONF_SETITIMER
struct timeval ev_time; /* time of the call (microseconds) */
# else /* SM_CONF_SETITIMER */
time_t ev_time; /* time of the call (seconds) */
# endif /* SM_CONF_SETITIMER */
void (*ev_func)__P((int));
/* function to call */
int ev_arg; /* argument to ev_func */
pid_t ev_pid; /* pid that set this event */
struct sm_event *ev_link; /* link to next item */
};
typedef struct sm_event SM_EVENT;
/* functions */
extern void sm_clrevent __P((SM_EVENT *));
extern void sm_clear_events __P((void));
extern SM_EVENT *sm_seteventm __P((int, void(*)__P((int)), int));
extern SM_EVENT *sm_sigsafe_seteventm __P((int, void(*)__P((int)), int));
extern SIGFUNC_DECL sm_tick __P((int));
/*
** SM_SETEVENT -- set an event to happen at a specific time in seconds.
**
** Translates the seconds into millseconds and calls sm_seteventm()
** to get a specific event to happen in the future at a specific time.
**
** Parameters:
** t -- intvl until next event occurs (seconds).
** f -- function to call on event.
** a -- argument to func on event.
**
** Returns:
** result of sm_seteventm().
**
** Side Effects:
** Any that sm_seteventm() have.
*/
#define sm_setevent(t, f, a) sm_seteventm((int)((t) * 1000), (f), (a))
#define sm_sigsafe_setevent(t, f, a) sm_sigsafe_seteventm((int)((t) * 1000), (f), (a))
#endif /* _SM_CLOCK_H */
|
