In message: <[EMAIL PROTECTED]>
Jan Knepper <[EMAIL PROTECTED]> writes:
: How would they return me the 'value' of 'ticks'?
:
: The problem is... I have a value's somewhere that has been assigned from
: 'ticks', like:
: ptr -> value = ticks;
:
: at an other moment I need to do something like...
:
: age = boottime + ( ticks - ptr -> value ) / factor;
:
: The problem in the second case however is that I can not seem to get to
: 'ticks' as it is userland code...
ptr->value should be set with getmicrotime() or microtime(). You can
then do a gettimeofday in userland to figure out the age.
MICROTIME(9) FreeBSD Kernel Developer's Manual MICROTIME(9)
NAME
microtime, getmicrotime, nanotime, getnanotime - get the current time
SYNOPSIS
#include <sys/time.h>
void
microtime(struct timeval *tv);
void
getmicrotime(struct timeval *tv);
void
nanotime(struct timespec *ts);
void
getnanotime(struct timespec *tsp);
DESCRIPTION
The microtime() and getmicrotime() functions store the system time as a
struct timeval at the address specified by tv. The nanotime() and
getnanotime() functions perform the same utility, but record the time as
a struct timespec instead.
Microtime() and nanotime() always query the timecounter to return the
current time as precisely as possible. Whereas getmicrotime() and
getnanotime() functions are abstractions which return a less precise, but
faster to obtain, time.
The intent of the getmicrotime() and getnanotime() functions is to
enforce the user's preference for timer accuracy versus execution time.
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