1 /* $NetBSD: jiffies.h,v 1.6 2014/07/26 14:24:08 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 #define jiffies_64 hardclock_ticks /* XXX */ 40 41 /* XXX Er, what? */ 42 #define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1) 43 44 static inline unsigned int 45 msecs_to_jiffies(unsigned int msec) 46 { 47 return mstohz(msec); 48 } 49 50 static inline unsigned int 51 jiffies_to_msecs(unsigned int j) 52 { 53 return hztoms(j); 54 } 55 56 static inline unsigned int 57 usecs_to_jiffies(unsigned int usec) 58 { 59 const struct timeval tv = { 60 .tv_sec = usec / 1000000, 61 .tv_usec = usec % 1000000, 62 }; 63 64 return tvtohz(&tv); 65 } 66 67 static inline unsigned int 68 timespec_to_jiffies(const struct timespec *ts) 69 { 70 return tstohz(ts); 71 } 72 73 /* XXX long is the wrong type here times... */ 74 75 #define __linux_time_compare(A, OP, B) (((long)(A) - (long)(B)) OP 0) 76 77 static inline bool 78 time_after(unsigned long a, unsigned long b) 79 { 80 return __linux_time_compare(a, >, b); 81 } 82 83 static inline bool 84 time_after_eq(unsigned long a, unsigned long b) 85 { 86 return __linux_time_compare(a, >=, b); 87 } 88 89 static inline bool 90 time_before(unsigned long a, unsigned long b) 91 { 92 return __linux_time_compare(a, <, b); 93 } 94 95 static inline bool 96 time_before_eq(unsigned long a, unsigned long b) 97 { 98 return __linux_time_compare(a, <=, b); 99 } 100 101 #endif /* _LINUX_JIFFIES_H_ */ 102