osfmk/sys/time.h

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