timer_create

Langue: en

Version: 2004-March-12 (fedora - 16/08/07)

Section: 2 (Appels système)

NAME

timer_create - Create a POSIX.1b interval timer clock

SYNOPSIS

long sys_timer_create (clockid_t which_clock, struct sigevent *timer_event_spec, timer_t *created_timer_id);

DESCRIPTION

timer_create creates a POSIX.1b interval timer, pointed to by created_timer_id, using the which_clock format. The timer_event_spec points to a sigevent structure if non-NULL. The sigevent structure defines the asynchronous notification that occurs when the timer expires.

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.
CLOCK_REALTIME_HR
High resolution version of CLOCK_REALTIME.
CLOCK_MONOTONIC_HR
High resolution version of CLOCK_MONOTONIC.
 

RETURN VALUE

timer_create returns 0 on success and updates the created_timer_id value; otherwise, it returns one of the errors listed in the "Errors" section.

ERRORS

-EINVAL
An invalid which_clock value was specified.
-EAGAIN
The system could not process the request.
-EFAULT
An invalid timer_event_spec value was specified.

SEE ALSO

timer_delete(2), timer_getoverrun(2), timer_gettime(2), timer_settime(2)

AUTHOR

Niki Rahimi