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.
