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.Dd May 19, 2010 .Dt TIMER_CREATE 2 .Os .Sh NAME .Nm timer_create .Nd create a per-process timer .Sh LIBRARY .Lb libc .Sh SYNOPSIS n time.h n signal.h .Ft int .Fn timer_create "clockid_t clockid" "struct sigevent * restrict evp" "timer_t * restrict timerid" .Sh DESCRIPTION The .Fn timer_create function creates a per-process timer using the clock specified in the .Ar clockid argument. If it succeeds, the .Fn timer_create function fills in the .Ar timerid argument with an id associated with the timer created that can be used by other timer related calls. The .Ar clockid must be a valid clock id as defined in n time.h . The timer is created in a disarmed state.
p An optional
q non- Ns Dv NULL .Em struct sigevent argument can be specified by the .Ar evp argument. If the .Ar evp argument is .Dv NULL , then .Fa evp->sigev_notify defaults to .Dv SIGEV_SIGNAL and .Fa evp->sigev_value is set to .Ar timerid . Refer to .Xr sigevent 3 for more details. .Sh NOTES Timers are not inherited after a .Xr fork 2 and are disarmed and deleted by an .Xr exec 3 . .Sh RETURN VALUES If successful, the .Fn timer_create function returns 0, and fills in the .Ar timerid argument with the id of the new timer that was created. Otherwise, it returns -1, and sets .Dv errno to indicate the error. .Sh ERRORS The .Fn timer_create function will fail if: l -tag -width Er t Bq Er EAGAIN The system is out of resources to satisfy this request, or the process has created all the timers it is allowed. t Bq Er EINVAL The argument .Ar clockid is not a valid clock id. .El .Sh SEE ALSO .Xr clock_getres 2 , .Xr clock_gettime 2 , .Xr clock_settime 2 , .Xr timer_delete 2 , .Xr timer_getoverrun 2 , .Xr timer_gettime 2 , .Xr timer_settime 2 , .Xr sigevent 3 .Sh STANDARDS .St -p1003.1b-93 , .St -p1003.1i-95
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