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	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	* Mach Operating System
	30	* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
	31	* All Rights Reserved.
	32	*
	33	* Permission to use, copy, modify and distribute this software and its
	34	* documentation is hereby granted, provided that both the copyright
	35	* notice and this permission notice appear in all copies of the
	36	* software, derivative works or modified versions, and any portions
	37	* thereof, and that both notices appear in supporting documentation.
	38	*
	39	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	40	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	41	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	42	*
	43	* Carnegie Mellon requests users of this software to return to
	44	*
	45	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	46	* School of Computer Science
	47	* Carnegie Mellon University
	48	* Pittsburgh PA 15213-3890
	49	*
	50	* any improvements or extensions that they make and grant Carnegie Mellon
	51	* the rights to redistribute these changes.
	52	*/
	53
	54	#ifndef TIME_VALUE_H_
	55	#define TIME_VALUE_H_
	56
	57	#include <sys/appleapiopts.h>
	58
	59	#include <mach/machine/vm_types.h>
	60
	61	/*
	62	* Time value returned by kernel.
	63	*/
	64
	65	struct time_value {
	66	integer_t seconds;
	67	integer_t microseconds;
	68	};
	69	typedef struct time_value time_value_t;
	70
	71	#ifdef __APPLE_API_UNSTABLE
	72
	73	/*
	74	* Macros to manipulate time values. Assume that time values
	75	* are normalized (microseconds <= 999999).
	76	*/
	77	#define TIME_MICROS_MAX (1000000)
	78
	79	#define time_value_add_usec(val, micros) { \
	80	if (((val)->microseconds += (micros)) \
	81	>= TIME_MICROS_MAX) { \
	82	(val)->microseconds -= TIME_MICROS_MAX; \
	83	(val)->seconds++; \
	84	} \
	85	}
	86
	87	#define time_value_add(result, addend) { \
	88	(result)->microseconds += (addend)->microseconds; \
	89	(result)->seconds += (addend)->seconds; \
	90	if ((result)->microseconds >= TIME_MICROS_MAX) { \
	91	(result)->microseconds -= TIME_MICROS_MAX; \
	92	(result)->seconds++; \
	93	} \
	94	}
	95
	96	#endif /* __APPLE_API_UNSTABLE */
	97
	98	#ifdef __APPLE_API_OBSOLETE
	99
	100	/*
	101	* Time value available through the mapped-time interface.
	102	* Read this mapped value with
	103	* do {
	104	* secs = mtime->seconds;
	105	* usecs = mtime->microseconds;
	106	* } while (secs != mtime->check_seconds);
	107	*/
	108
	109	typedef struct mapped_time_value {
	110	integer_t seconds;
	111	integer_t microseconds;
	112	integer_t check_seconds;
	113	} mapped_time_value_t;
	114
	115	#endif /* __APPLE_API_OBSOLETE */
	116
	117	#endif /* TIME_VALUE_H_ */