CLOCK_GETTIME

Section: Linux Programmer's Manual (2)
Updated: 2004-March-12
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NAME

clock_gettime - Return the current timespec value of tp for the specified clock  

SYNOPSIS

long sys_clock_gettime (clockid_t which_clock, struct timespec *tp);

 

DESCRIPTION

clock_gettime returns the current timespec value of tp for the specific clock, which_clock. The values that clockid_t currently supports for POSIX.1b timers, as defined in include/linux/time.h, are:

CLOCK_REALTIME

Systemwide realtime clock.

CLOCK_MONOTONIC

Represents monotonic time. Cannot be set.

CLOCK_PROCESS_CPUTIME_ID

High resolution per-process timer.

CLOCK_THREAD_CPUTIME_ID

Thread-specific timer.

 

RETURN VALUE

clock_gettime returns 0 on success; otherwise, it returns one of the errors listed in the "Errors" section.  

ERRORS

-EINVAL

An invalid which_clock value was specified.

-EFAULT

Can not coy to tp value.

 

SEE ALSO

clock_getres(2), clock_nanosleep(2), clock_settime(2)  

AUTHOR

Niki Rahimi

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Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

ERRORS

SEE ALSO

AUTHOR

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