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