home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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 _MACH_TIME_VALUE_H_
-