Current File : //backups/router/usr/include/sys/timers.h
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2005 David Xu <davidxu@freebsd.org>
* Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano.
* 4. The name of Chris Provenzano may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Description : Basic timers header.
*/
#ifndef _SYS_TIMERS_H_
#define _SYS_TIMERS_H_
#include <sys/time.h>
#ifdef _KERNEL
/*
* Structures used to manage POSIX timers in a process.
*/
struct itimer {
struct mtx it_mtx;
struct sigevent it_sigev;
struct itimerspec it_time;
struct proc *it_proc;
int it_flags;
int it_usecount;
int it_overrun; /* Overruns currently accumulating */
int it_overrun_last; /* Overruns associated w/ a delivery */
int it_clockid;
ksiginfo_t it_ksi;
struct callout it_callout;
};
#define ITF_DELETING 0x01
#define ITF_WANTED 0x02
#define ITF_PSTOPPED 0x04
#define TIMER_MAX 32
#define ITIMER_LOCK(it) mtx_lock(&(it)->it_mtx)
#define ITIMER_UNLOCK(it) mtx_unlock(&(it)->it_mtx)
struct itimers {
struct itimer *its_timers[TIMER_MAX];
};
struct kclock {
int (*timer_create)(struct itimer *timer);
int (*timer_settime)(struct itimer * timer, int flags,
struct itimerspec * new_value,
struct itimerspec * old_value);
int (*timer_delete)(struct itimer * timer);
int (*timer_gettime)(struct itimer * timer,
struct itimerspec * cur_value);
};
void itimers_exec(struct proc *p);
void itimers_exit(struct proc *p);
int itimer_accept(struct proc *p, int tid, ksiginfo_t *ksi);
#endif
#endif /* !_SYS_TIMERS_H_ */
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