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- /*
- * 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.
- */
- /*
- * HISTORY
- * $Log: time_value.h,v $
- * Revision 2.6 93/01/24 14:13:24 danner
- * Added include of mach/machine/vm_types.h to get definition
- * of integer_t.
- * [93/01/17 mrt]
- *
- * Revision 2.5 93/01/14 17:48:20 danner
- * Standardized include symbol name.
- * [92/06/10 pds]
- * 64bit cleanup.
- * [92/12/01 af]
- *
- * Revision 2.4 91/05/18 14:35:13 rpd
- * Added mapped_time_value_t.
- * [91/03/21 rpd]
- *
- * Revision 2.3 91/05/14 17:01:40 mrt
- * Correcting copyright
- *
- * Revision 2.2 91/02/05 17:36:49 mrt
- * Changed to new Mach copyright
- * [91/02/01 17:22:07 mrt]
- *
- * Revision 2.1 89/08/03 16:06:24 rwd
- * Created.
- *
- * 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_
-
- #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++; \
- } \
- }
-
- /*
- * Time value available through the mapped-time interface.
- * Read this mapped value with
- * do {
- * secs = mtime->seconds;
- * usecs = mtime->microseconds;
- * } while (secs != mtime->check_seconds);
- */
-
- typedef struct mapped_time_value {
- integer_t seconds;
- integer_t microseconds;
- integer_t check_seconds;
- } mapped_time_value_t;
-
- #endif /* _MACH_TIME_VALUE_H_ */
-