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jiffies.h revision 1.2.6.2 
      1 /*	$NetBSD: jiffies.h,v 1.2.6.2 2014/05/22 11:40:56 yamt 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