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124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* $NetBSD: timer.h,v 1.5 2014/08/26 17:26:05 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Notes on porting:
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*
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* - Linux does not have teardown_timer. You must add it yourself in
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* the appropriate place.
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*/
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#ifndef _LINUX_TIMER_H_
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#define _LINUX_TIMER_H_
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#include <sys/callout.h>
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#include <linux/jiffies.h>
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struct timer_list {
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struct callout tl_callout;
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};
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static inline void
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setup_timer(struct timer_list *timer, void (*fn)(unsigned long),
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unsigned long arg)
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{
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callout_init(&timer->tl_callout, 0);
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/* XXX Super-sketchy casts! */
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callout_setfunc(&timer->tl_callout, (void (*)(void *))fn,
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(void *)(uintptr_t)arg);
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}
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static inline void
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teardown_timer(struct timer_list *timer)
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{
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callout_destroy(&timer->tl_callout);
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}
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static inline void
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mod_timer(struct timer_list *timer, unsigned long then)
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{
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const unsigned long now = jiffies;
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callout_schedule(&timer->tl_callout, (now < then? (then - now) : 0));
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}
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static inline void
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mod_timer_pinned(struct timer_list *timer, unsigned long then)
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{
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/* XXX Stay on the same CPU it was originally on... */
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mod_timer(timer, then);
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}
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static inline void
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del_timer(struct timer_list *timer)
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{
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callout_stop(&timer->tl_callout);
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}
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static inline void
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del_timer_sync(struct timer_list *timer)
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{
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callout_halt(&timer->tl_callout, NULL);
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}
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static inline bool
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timer_pending(struct timer_list *timer)
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{
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return callout_pending(&timer->tl_callout);
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}
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/*
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* XXX This is bogus -- the Linux version does various machinations to
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* give some jitter so that stuff doesn't wake up all at once.
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*/
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static inline unsigned long
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round_jiffies_up(unsigned long j)
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{
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return roundup(j, hz);
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}
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static inline unsigned long
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round_jiffies_up_relative(unsigned long j)
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{
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return roundup(j, hz);
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}
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#endif /* _LINUX_TIMER_H_ */
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