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gettimer(3) [osf1 man page]

gettimer(3)						     Library Functions Manual						       gettimer(3)

NAME
gettimer - Gets value of a per-process timer LIBRARY
Standard C Library (libc.a) SYNOPSIS
#include <sys/timers.h> int gettimer( timer_t timerid, struct itimerspec *tp) ; PARAMETERS
Specifies the per-process timer to use; this value is obtained from a call to mktimer(). Points to an itimerspec structure. DESCRIPTION
The gettimer() function gets the current value of a per-process timer. NOTES
The gettimer() function is part of the POSIX 1003.4 real-time extensions, which is not an approved standard. As such, it is liable to change. Trial use RETURN VALUES
Upon successful completion, the gettimer() function returns the value 0 (zero). Otherwise, the gettimer() function returns a value of -1 and sets errno to indicate the error. ERRORS
If the gettimer() function fails, errno may be set to the following value: The timerid parameter does not specify a known timer. RELATED INFORMATION
Functions: mktimer(2), reltimer(3), rmtimer(3) delim off gettimer(3)

Check Out this Related Man Page

reltimer(3C)															      reltimer(3C)

NAME
reltimer - relatively arm a per-process timer SYNOPSIS
DESCRIPTION
The function sets the of the specified timer to an offset from the current clock setting. If specifies a value argument with the member equal to zero, the timer is disabled. updates the it_interval value of the timer to the value specified. Time values smaller than the resolution of the specified timer are rounded up to its resolution; timer values larger than the maximum value of the specified timer are rounded down to the maximum value (see mktimer(3C)). returns in the ovalue parameter a value representing the previous amount of time before the timer would have expired or zero if the timer was disabled, together with the previous interval timer period. The members of ovalue are subject to the resolution of the timer, and are the same values that would be returned by a call. The behavior of this function is undefined if value is NULL. RETURN VALUE
Upon successful completion, returns zero; otherwise, it returns -1 and sets to indicate the error. ERRORS
fails if any of the following conditions are encountered: [EINVAL] does not correspond to an ID returned by or the value structure specified a nanosecond value less than zero or greater than or equal to 1000 million. [EIO] An error occurred while accessing the clock device. FILES
SEE ALSO
timers(2), gettimer(3C), mktimer(3C), thread_safety(5). STANDARDS CONFORMANCE
reltimer(3C)
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