timer.h revision 1.2
1 1.2 riastrad /* $NetBSD: timer.h,v 1.2 2014/03/18 18:20:43 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_TIMER_H_ 33 1.2 riastrad #define _LINUX_TIMER_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/callout.h> 36 1.2 riastrad 37 1.2 riastrad #include <linux/jiffies.h> 38 1.2 riastrad 39 1.2 riastrad struct timer_list { 40 1.2 riastrad struct callout tl_callout; 41 1.2 riastrad }; 42 1.2 riastrad 43 1.2 riastrad static inline void 44 1.2 riastrad setup_timer(struct timer_list *timer, void (*fn)(unsigned long), 45 1.2 riastrad unsigned long arg) 46 1.2 riastrad { 47 1.2 riastrad 48 1.2 riastrad callout_init(&timer->tl_callout, 0); 49 1.2 riastrad 50 1.2 riastrad /* XXX Super-sketchy casts! */ 51 1.2 riastrad callout_setfunc(&timer->tl_callout, (void (*)(void *))fn, 52 1.2 riastrad (void *)(uintptr_t)arg); 53 1.2 riastrad } 54 1.2 riastrad 55 1.2 riastrad static inline void 56 1.2 riastrad mod_timer(struct timer_list *timer, unsigned long then) 57 1.2 riastrad { 58 1.2 riastrad const unsigned long now = jiffies; 59 1.2 riastrad 60 1.2 riastrad callout_schedule(&timer->tl_callout, (now < then? (then - now) : 0)); 61 1.2 riastrad } 62 1.2 riastrad 63 1.2 riastrad static inline void 64 1.2 riastrad del_timer_sync(struct timer_list *timer) 65 1.2 riastrad { 66 1.2 riastrad callout_halt(&timer->tl_callout, NULL); 67 1.2 riastrad callout_destroy(&timer->tl_callout); 68 1.2 riastrad } 69 1.2 riastrad 70 1.2 riastrad /* 71 1.2 riastrad * XXX This is bogus -- the Linux version does various machinations to 72 1.2 riastrad * give some jitter so that stuff doesn't wake up all at once. 73 1.2 riastrad */ 74 1.2 riastrad 75 1.2 riastrad static inline unsigned long 76 1.2 riastrad round_jiffies_up(unsigned long j) 77 1.2 riastrad { 78 1.2 riastrad return roundup(j, hz); 79 1.2 riastrad } 80 1.2 riastrad 81 1.2 riastrad static inline unsigned long 82 1.2 riastrad round_jiffies_up_relative(unsigned long j) 83 1.2 riastrad { 84 1.2 riastrad return roundup(j, hz); 85 1.2 riastrad } 86 1.2 riastrad 87 1.2 riastrad #endif /* _LINUX_TIMER_H_ */ 88
Indexes created Mon Sep 22 10:09:38 GMT 2025