2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
3 * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Chris Provenzano.
17 * 4. The name of Chris Provenzano may not be used to endorse or promote
18 * products derived from this software without specific prior written
21 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Description : Basic timers header.
38 #ifndef _SYS_TIMERS_H_
39 #define _SYS_TIMERS_H_
45 * Structures used to manage POSIX timers in a process.
49 struct sigevent it_sigev;
50 struct itimerspec it_time;
54 int it_overrun; /* Overruns currently accumulating */
55 int it_overrun_last; /* Overruns associated w/ a delivery */
62 struct callout it_callout;
67 LIST_ENTRY(itimer) it_link;
68 TAILQ_ENTRY(itimer) it_worklink;
75 #define it_callout _data._rt.it_callout
76 #define it_link _data._cpu.it_link
77 #define it_active _data._cpu.it_active
78 #define it_worklink _data._cpu.it_worklink
79 #define it_cflags _data._cpu.it_cflags
81 #define ITF_DELETING 0x01
82 #define ITF_WANTED 0x02
84 #define ITCF_ONWORKLIST 0x01
88 #define ITIMER_LOCK(it) mtx_lock(&(it)->it_mtx)
89 #define ITIMER_UNLOCK(it) mtx_unlock(&(it)->it_mtx)
91 LIST_HEAD(itimerlist, itimer);
94 struct itimerlist its_virtual;
95 struct itimerlist its_prof;
96 TAILQ_HEAD(, itimer) its_worklist;
97 struct itimer *its_timers[TIMER_MAX];
101 int (*timer_create)(struct itimer *timer);
102 int (*timer_settime)(struct itimer * timer, int flags,
103 struct itimerspec * new_value,
104 struct itimerspec * old_value);
105 int (*timer_delete)(struct itimer * timer);
106 int (*timer_gettime)(struct itimer * timer,
107 struct itimerspec * cur_value);
108 void (*event_hook)(struct proc *p, clockid_t clock_id, int event);
111 /* Event values for event_hook() */
112 #define ITIMER_EV_EXEC 0
113 #define ITIMER_EV_EXIT 1
115 int itimer_accept(struct proc *p, int tid, ksiginfo_t *ksi);
117 #endif /* !_SYS_TIMERS_H_ */