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author | rneugeba@wyvis.research <rneugeba@wyvis.research> | 2003-10-06 11:26:01 +0000 |
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committer | rneugeba@wyvis.research <rneugeba@wyvis.research> | 2003-10-06 11:26:01 +0000 |
commit | f2c4c1d4e811964ff9fc87101f0804cf10f9789e (patch) | |
tree | 09a4ea50df6f7813a76d3e9f97b374b47f1ee64b /mini-os/h/time.h | |
parent | 922fddb0355189b9e0b4a85bca04d03569b7ad56 (diff) | |
download | xen-f2c4c1d4e811964ff9fc87101f0804cf10f9789e.tar.gz xen-f2c4c1d4e811964ff9fc87101f0804cf10f9789e.tar.bz2 xen-f2c4c1d4e811964ff9fc87101f0804cf10f9789e.zip |
bitkeeper revision 1.478.1.1 (3f815149k7sE-z_IK6MG5eHi34m-Qg)
Minimal guest OS (based on some old code from Keir)
Diffstat (limited to 'mini-os/h/time.h')
-rw-r--r-- | mini-os/h/time.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/mini-os/h/time.h b/mini-os/h/time.h new file mode 100644 index 0000000000..b136f4b0c3 --- /dev/null +++ b/mini-os/h/time.h @@ -0,0 +1,59 @@ +/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*- + **************************************************************************** + * (C) 2003 - Rolf Neugebauer - Intel Research Cambridge + **************************************************************************** + * + * File: time.h + * Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk) + * Changes: + * + * Date: Jul 2003 + * + * Environment: Xen Minimal OS + * Description: Time and timer functions + * + **************************************************************************** + * $Id: h-insert.h,v 1.4 2002/11/08 16:03:55 rn Exp $ + **************************************************************************** + */ + +#ifndef _TIME_H_ +#define _TIME_H_ + +#include <list.h> + +/* + * System Time + * 64 bit value containing the nanoseconds elapsed since boot time. + * This value is adjusted by frequency drift. + * NOW() returns the current time. + * The other macros are for convenience to approximate short intervals + * of real time into system time + */ +typedef s64 s_time_t; +#define NOW() ((s_time_t)get_s_time()) +#define SECONDS(_s) (((s_time_t)(_s)) * 1000000000UL ) +#define TENTHS(_ts) (((s_time_t)(_ts)) * 100000000UL ) +#define HUNDREDTHS(_hs) (((s_time_t)(_hs)) * 10000000UL ) +#define MILLISECS(_ms) (((s_time_t)(_ms)) * 1000000UL ) +#define MICROSECS(_us) (((s_time_t)(_us)) * 1000UL ) +#define Time_Max ((s_time_t) 0x7fffffffffffffffLL) +#define FOREVER Time_Max + + +/* wall clock time */ +typedef long time_t; +typedef long suseconds_t; +struct timeval { + time_t tv_sec; /* seconds */ + suseconds_t tv_usec; /* microseconds */ +}; + + +/* prototypes */ +void init_time(void); +s_time_t get_s_time(void); +s_time_t get_v_time(void); +void gettimeofday(struct timeval *tv); + +#endif /* _TIME_H_ */ |