| 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 | |