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/*
* Mach Operating System
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*
* HISTORY
* 5-Apr-87 Avadis Tevanian (avie) at Carnegie-Mellon University
* Isolate machine dependencies - machine/time_stamp chooses a
* TS_FORMAT, if not chosen this module defaults it to 1. Also
* guarded against multiple inclusion.
*
* 30-Mar-87 David Black (dlb) at Carnegie-Mellon University
* Created.
*
**********************************************************************
*/
#ifndef _MACH_TIME_STAMP_
#define _MACH_TIME_STAMP_
#import <mach/machine/kern_return.h>
#import <mach/machine/time_stamp.h>
/*
* time_stamp.h -- definitions for low-overhead timestamps.
*/
struct tsval {
unsigned low_val; /* least significant word */
unsigned high_val; /* most significant word */
};
/*
* Format definitions.
*/
#ifndef TS_FORMAT
/*
* Default case - Just return a tick count for machines that
* don't support or haven't implemented this. Assume 100Hz ticks.
*
* low_val - Always 0.
* high_val - tick count.
*/
#define TS_FORMAT 1
#if KERNEL
extern unsigned ts_tick_count;
#endif
#endif
#if NeXT
extern kern_return_t kern_timestamp(struct tsval *);
#else
#if KERNEL
extern kern_return_t kern_timestamp();
#endif
#endif
/*
* List of all format definitions for convert_ts_to_tv.
*/
#define TS_FORMAT_DEFAULT 1
#define TS_FORMAT_MMAX 2
#define TS_FORMAT_NeXT 3
#endif
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