1 /* $NetBSD: jiffies.h,v 1.2 2014/03/18 18:20:43 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_JIFFIES_H_ 33 #define _LINUX_JIFFIES_H_ 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 38 #define jiffies hardclock_ticks 39 40 static inline unsigned int 41 msecs_to_jiffies(unsigned int msec) 42 { 43 return mstohz(msec); 44 } 45 46 static inline unsigned int 47 jiffies_to_msecs(unsigned int j) 48 { 49 return hztoms(j); 50 } 51 52 static inline unsigned int 53 usecs_to_jiffies(unsigned int usec) 54 { 55 return mstohz((usec + (1000 / hz) - 1) / (1000 / hz)); 56 } 57 58 static inline unsigned int 59 timespec_to_jiffies(const struct timespec *ts) 60 { 61 return tstohz(ts); 62 } 63 64 /* XXX long is the wrong type here times... */ 65 66 #define __linux_time_compare(A, OP, B) (((long)(A) - (long)(B)) OP 0) 67 68 static inline bool 69 time_after(unsigned long a, unsigned long b) 70 { 71 return __linux_time_compare(a, >, b); 72 } 73 74 static inline bool 75 time_after_eq(unsigned long a, unsigned long b) 76 { 77 return __linux_time_compare(a, >=, b); 78 } 79 80 static inline bool 81 time_before(unsigned long a, unsigned long b) 82 { 83 return __linux_time_compare(a, <, b); 84 } 85 86 static inline bool 87 time_before_eq(unsigned long a, unsigned long b) 88 { 89 return __linux_time_compare(a, <=, b); 90 } 91 92 #endif /* _LINUX_JIFFIES_H_ */ 93