[apple/xnu.git] / osfmk / mach / time_value.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

#ifndef	_MACH_TIME_VALUE_H_
#define	_MACH_TIME_VALUE_H_

#include <mach/machine/vm_types.h>

/*
 *	Time value returned by kernel.
 */

struct time_value {
	integer_t seconds;
	integer_t microseconds;
};

typedef	struct time_value	time_value_t;

/*
 *	Macros to manipulate time values.  Assume that time values
 *	are normalized (microseconds <= 999999).
 */
#define	TIME_MICROS_MAX	(1000000)

#define	time_value_add_usec(val, micros)	{	\
	if (((val)->microseconds += (micros))		\
		>= TIME_MICROS_MAX) {			\
	    (val)->microseconds -= TIME_MICROS_MAX;	\
	    (val)->seconds++;				\
	}						\
}

#define	time_value_add(result, addend)		{		\
	(result)->microseconds += (addend)->microseconds;	\
	(result)->seconds += (addend)->seconds;			\
	if ((result)->microseconds >= TIME_MICROS_MAX) {	\
	    (result)->microseconds -= TIME_MICROS_MAX;		\
	    (result)->seconds++;				\
	}							\
}

#endif	/* _MACH_TIME_VALUE_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
2d21ac55 A	4	* @APPLE_OSREFERENCE_LICENSE_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 License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* @OSF_COPYRIGHT@
	30	*/
1c79356b A	31	/*
	32	* Mach Operating System
	33	* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
	34	* All Rights Reserved.
	35	*
	36	* Permission to use, copy, modify and distribute this software and its
	37	* documentation is hereby granted, provided that both the copyright
	38	* notice and this permission notice appear in all copies of the
	39	* software, derivative works or modified versions, and any portions
	40	* thereof, and that both notices appear in supporting documentation.
	41	*
	42	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	43	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	44	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	45	*
	46	* Carnegie Mellon requests users of this software to return to
	47	*
	48	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	49	* School of Computer Science
	50	* Carnegie Mellon University
	51	* Pittsburgh PA 15213-3890
	52	*
	53	* any improvements or extensions that they make and grant Carnegie Mellon
	54	* the rights to redistribute these changes.
	55	*/
1c79356b	56
91447636 A	57	#ifndef _MACH_TIME_VALUE_H_
91447636 A	58	#define _MACH_TIME_VALUE_H_
9bccf70c	59
1c79356b A	60	#include <mach/machine/vm_types.h>
	61
	62	/*
	63	* Time value returned by kernel.
	64	*/
	65
	66	struct time_value {
	67	integer_t seconds;
	68	integer_t microseconds;
	69	};
1c79356b	70
91447636	71	typedef struct time_value time_value_t;
9bccf70c	72
1c79356b A	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
91447636	96	#endif /* _MACH_TIME_VALUE_H_ */