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TIMER_CREATE(2) System Calls Manual TIMER_CREATE(2)

timer_createcreate a per-process timer

library “libc”

#include <time.h>
#include <signal.h>

timer_create(clockid_t clockid, struct sigevent * restrict evp, timer_t * restrict timerid);

The timer_create() function creates a per-process timer using the clock specified in the clockid argument. If it succeeds, the timer_create() function fills in the timerid argument with an id associated with the timer created that can be used by other timer related calls. The clockid must be a valid clock id as defined in <time.h>. The timer is created in a disarmed state.

An optional (non-NULL) struct sigevent argument can be specified by the evp argument. If the evp argument is NULL, then evp->sigev_notify defaults to SIGEV_SIGNAL and evp->sigev_value is set to timerid. Refer to sigevent(3) for more details.

Timers are not inherited after a fork(2) and are disarmed and deleted by an exec(3).

If successful, the timer_create() function returns 0, and fills in the timerid argument with the id of the new timer that was created. Otherwise, it returns -1, and sets errno to indicate the error.

The timer_create() function will fail if:

The system is out of resources to satisfy this request, or the process has created all the timers it is allowed.
The argument clockid is not a valid clock id.

clock_getres(2), clock_gettime(2), clock_settime(2), timer_delete(2), timer_getoverrun(2), timer_gettime(2), timer_settime(2), sigevent(3)

IEEE Std 1003.1b-1993 (“POSIX.1b”), IEEE Std 1003.1i-1995 (“POSIX.1i”)

May 19, 2010 NetBSD-7.0.1