1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
5 * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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
21 * permission.
22 *
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
33 * SUCH DAMAGE.
34 *
35 * Description : Basic timers header.
36 */
37
38#ifndef _SYS_TIMERS_H_
39#define _SYS_TIMERS_H_
40
41#include <sys/time.h>
42
43#ifdef _KERNEL
44/*
45 * Structures used to manage POSIX timers in a process.
46 */
47struct itimer {
48 struct mtx it_mtx;
49 struct sigevent it_sigev;
50 struct itimerspec it_time;
51 struct proc *it_proc;
52 int it_flags;
53 int it_usecount;
54 int it_overrun; /* Overruns currently accumulating */
55 int it_overrun_last; /* Overruns associated w/ a delivery */
56 int it_clockid;
57 ksiginfo_t it_ksi;
58 struct callout it_callout;
59};
60
61#define ITF_DELETING 0x01
62#define ITF_WANTED 0x02
63#define ITF_PSTOPPED 0x04
64
65#define TIMER_MAX 32
66
67#define ITIMER_LOCK(it) mtx_lock(&(it)->it_mtx)
68#define ITIMER_UNLOCK(it) mtx_unlock(&(it)->it_mtx)
69
70struct itimers {
71 struct itimer *its_timers[TIMER_MAX];
72};
73
74struct kclock {
75 int (*timer_create)(struct itimer *timer);
76 int (*timer_settime)(struct itimer * timer, int flags,
77 struct itimerspec * new_value,
78 struct itimerspec * old_value);
79 int (*timer_delete)(struct itimer * timer);
80 int (*timer_gettime)(struct itimer * timer,
81 struct itimerspec * cur_value);
82};
83
84void itimers_exec(struct proc *p);
85void itimers_exit(struct proc *p);
86int itimer_accept(struct proc *p, int tid, ksiginfo_t *ksi);
87#endif
88#endif /* !_SYS_TIMERS_H_ */