osfmk/sys/time.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * HISTORY
  35  *
  36  * Revision 1.1.1.1  1998/09/22 21:05:48  wsanchez
  37  * Import of Mac OS X kernel (~semeria)
  38  *
  39  * Revision 1.1.1.1  1998/03/07 02:25:59  wsanchez
  40  * Import of OSF Mach kernel (~mburg)
  41  *
  42  * Revision 1.2.6.1  1994/09/23  03:13:17  ezf
  43  *      change marker to not FREE
  44  *      [1994/09/22  21:58:56  ezf]
  45  *
  46  * Revision 1.2.2.2  1993/06/09  02:55:33  gm
  47  *      Added to OSF/1 R1.3 from NMK15.0.
  48  *      [1993/06/02  21:31:02  jeffc]
  49  *
  50  * Revision 1.2  1993/04/19  17:17:07  devrcs
  51  *      Fixes for ANSI C
  52  *      [1993/02/26  14:02:46  sp]
  53  *
  54  * Revision 1.1  1992/09/30  02:36:58  robert
  55  *      Initial revision
  56  *
  57  * $EndLog$
  58  */
  59 /* CMU_HIST */
  60 /*
  61  * Revision 2.3  91/05/14  17:40:25  mrt
  62  *      Correcting copyright
  63  *
  64  * Revision 2.2  91/02/05  17:56:58  mrt
  65  *      Changed to new Mach copyright
  66  *      [91/02/01  17:49:29  mrt]
  67  *
  68  */
  69 /* CMU_ENDHIST */
  70 /*
  71  * Mach Operating System
  72  * Copyright (c) 1991 Carnegie Mellon University
  73  * All Rights Reserved.
  74  *
  75  * Permission to use, copy, modify and distribute this software and its
  76  * documentation is hereby granted, provided that both the copyright
  77  * notice and this permission notice appear in all copies of the
  78  * software, derivative works or modified versions, and any portions
  79  * thereof, and that both notices appear in supporting documentation.
  80  *
  81  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  82  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  83  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  84  *
  85  * Carnegie Mellon requests users of this software to return to
  86  *
  87  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  88  *  School of Computer Science
  89  *  Carnegie Mellon University
  90  *  Pittsburgh PA 15213-3890
  91  *
  92  * any improvements or extensions that they make and grant Carnegie Mellon rights
  93  * to redistribute these changes.
  94  */
  95 /*
  96  */
  97 /*
  98  *      Time-keeper for kernel IO devices.
  99  *
 100  *      May or may not have any relation to wall-clock time.
 101  */
 102
 103 #ifndef _SYS_TIME_H_
 104 #define _SYS_TIME_H_
 105 #include <mach/time_value.h>
 106
 107 extern time_value_t     time;
 108
 109 /*
 110  * Definitions to keep old code happy.
 111  */
 112 #define timeval_t time_value_t
 113 #define timeval time_value
 114 #define tv_sec  seconds
 115 #define tv_usec microseconds
 116
 117 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 118 #define timercmp(tvp, uvp, cmp) \
 119         ((tvp)->tv_sec cmp (uvp)->tv_sec || \
 120          (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec)
 121 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 122 #endif /* _SYS_TIME_H_ */