1 /* 2 * Copyright (c) 2017 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 #ifndef _LINUX_HRTIMER_H_ 27 #define _LINUX_HRTIMER_H_ 28 29 #include <linux/ktime.h> 30 #include <linux/list.h> 31 #include <linux/wait.h> 32 #include <linux/timer.h> 33 34 enum hrtimer_mode { 35 HRTIMER_MODE_ABS = 0x0, 36 HRTIMER_MODE_REL = 0x1, 37 }; 38 39 enum hrtimer_restart { 40 HRTIMER_NORESTART, /* Timer is not restarted */ 41 HRTIMER_RESTART, /* Timer must be restarted */ 42 }; 43 44 struct hrtimer { 45 struct callout timer_callout; 46 clockid_t clock_id; 47 enum hrtimer_mode ht_mode; 48 bool active; 49 enum hrtimer_restart (*function)(struct hrtimer *); 50 struct lwkt_token timer_token; 51 }; 52 53 extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock, 54 enum hrtimer_mode mode); 55 56 extern void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, 57 u64 range_ns, const enum hrtimer_mode mode); 58 59 extern int hrtimer_cancel(struct hrtimer *timer); 60 61 extern bool hrtimer_active(const struct hrtimer *timer); 62 63 #endif /* _LINUX_HRTIMER_H_ */ 64