osfmk/sys/time.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * HISTORY
  30  *
  31  * Revision 1.1.1.1  1998/09/22 21:05:48  wsanchez
  32  * Import of Mac OS X kernel (~semeria)
  33  *
  34  * Revision 1.1.1.1  1998/03/07 02:25:59  wsanchez
  35  * Import of OSF Mach kernel (~mburg)
  36  *
  37  * Revision 1.2.6.1  1994/09/23  03:13:17  ezf
  38  *      change marker to not FREE
  39  *      [1994/09/22  21:58:56  ezf]
  40  *
  41  * Revision 1.2.2.2  1993/06/09  02:55:33  gm
  42  *      Added to OSF/1 R1.3 from NMK15.0.
  43  *      [1993/06/02  21:31:02  jeffc]
  44  *
  45  * Revision 1.2  1993/04/19  17:17:07  devrcs
  46  *      Fixes for ANSI C
  47  *      [1993/02/26  14:02:46  sp]
  48  *
  49  * Revision 1.1  1992/09/30  02:36:58  robert
  50  *      Initial revision
  51  *
  52  * $EndLog$
  53  */
  54 /* CMU_HIST */
  55 /*
  56  * Revision 2.3  91/05/14  17:40:25  mrt
  57  *      Correcting copyright
  58  *
  59  * Revision 2.2  91/02/05  17:56:58  mrt
  60  *      Changed to new Mach copyright
  61  *      [91/02/01  17:49:29  mrt]
  62  *
  63  */
  64 /* CMU_ENDHIST */
  65 /*
  66  * Mach Operating System
  67  * Copyright (c) 1991 Carnegie Mellon University
  68  * All Rights Reserved.
  69  *
  70  * Permission to use, copy, modify and distribute this software and its
  71  * documentation is hereby granted, provided that both the copyright
  72  * notice and this permission notice appear in all copies of the
  73  * software, derivative works or modified versions, and any portions
  74  * thereof, and that both notices appear in supporting documentation.
  75  *
  76  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  77  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  78  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  79  *
  80  * Carnegie Mellon requests users of this software to return to
  81  *
  82  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  83  *  School of Computer Science
  84  *  Carnegie Mellon University
  85  *  Pittsburgh PA 15213-3890
  86  *
  87  * any improvements or extensions that they make and grant Carnegie Mellon rights
  88  * to redistribute these changes.
  89  */
  90 /*
  91  */
  92 /*
  93  *      Time-keeper for kernel IO devices.
  94  *
  95  *      May or may not have any relation to wall-clock time.
  96  */
  97
  98 #ifndef _SYS_TIME_H_
  99 #define _SYS_TIME_H_
 100 #include <mach/time_value.h>
 101
 102 extern time_value_t     time;
 103
 104 /*
 105  * Definitions to keep old code happy.
 106  */
 107 #define timeval_t time_value_t
 108 #define timeval time_value
 109 #define tv_sec  seconds
 110 #define tv_usec microseconds
 111
 112 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 113 #define timercmp(tvp, uvp, cmp) \
 114         ((tvp)->tv_sec cmp (uvp)->tv_sec || \
 115          (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec)
 116 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 117 #endif /* _SYS_TIME_H_ */