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58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
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****************************************************************************
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* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
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* (C) 2005 - Grzegorz Milos - Intel Research Cambridge
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****************************************************************************
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*
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* File: time.h
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* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
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* Changes: Grzegorz Milos (gm281@cam.ac.uk)
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*
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* Date: Jul 2003, changesJun 2005
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*
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* Environment: Xen Minimal OS
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* Description: Time and timer functions
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*
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****************************************************************************
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*/
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#ifndef _TIME_H_
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#define _TIME_H_
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/*
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* System Time
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* 64 bit value containing the nanoseconds elapsed since boot time.
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* This value is adjusted by frequency drift.
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* NOW() returns the current time.
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* The other macros are for convenience to approximate short intervals
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* of real time into system time
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*/
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typedef s64 s_time_t;
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#define NOW() ((s_time_t)get_s_time())
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#define SECONDS(_s) (((s_time_t)(_s)) * 1000000000UL )
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#define TENTHS(_ts) (((s_time_t)(_ts)) * 100000000UL )
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#define HUNDREDTHS(_hs) (((s_time_t)(_hs)) * 10000000UL )
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#define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000UL )
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#define MICROSECS(_us) (((s_time_t)(_us)) * 1000UL )
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#define Time_Max ((s_time_t) 0x7fffffffffffffffLL)
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#define FOREVER Time_Max
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/* wall clock time */
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typedef long time_t;
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typedef long suseconds_t;
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struct timeval {
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time_t tv_sec; /* seconds */
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suseconds_t tv_usec; /* microseconds */
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};
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/* prototypes */
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void init_time(void);
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s_time_t get_s_time(void);
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s_time_t get_v_time(void);
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void gettimeofday(struct timeval *tv);
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void block(u32 millisecs);
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#endif /* _TIME_H_ */
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