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/*
* Mach Operating System
* Copyright (c) 1989 Carnegie-Mellon University
* Copyright (c) 1988 Carnegie-Mellon University
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* HISTORY
* $Log: time_value.h,v $
* Revision 2.5 89/03/09 20:24:28 rpd
* More cleanup.
*
* Revision 2.4 89/02/25 18:41:34 gm0w
* Changes for cleanup.
*
* Revision 2.3 89/02/07 00:53:58 mwyoung
* Relocated from sys/time_value.h
*
* Revision 2.2 89/01/31 01:21:58 rpd
* TIME_MICROS_MAX should be 1 Million, not 10 Million.
* [88/10/12 dlb]
*
* 4-Jan-88 David Golub (dbg) at Carnegie-Mellon University
* Created.
*
*/
#ifndef _MACH_TIME_VALUE_H_
#define _MACH_TIME_VALUE_H_
/*
* Time value returned by kernel.
*/
struct time_value {
long seconds;
long 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
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