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