osf1 man page for timer_create

timer_create(3) 					     Library Functions Manual						   timer_create(3)

NAME
       timer_create - Allocates a per-process timer

LIBRARY
       Realtime Library (librt.so, librt.a)

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

       int timer_create (      clockid_t clock_id,	struct sigevent *evp,	   timer_t *timerid );

PARAMETERS
       clock_id    The type of clock on which the timer is based. The CLOCK_REALTIME clock is supported.

       *evp	   A pointer to a sigevent structure, which defines the signal sent to the process on timer expiration.

       *timerid    A pointer to the timer ID returned by the call to the timer_create function.

DESCRIPTION
       The  timer_create  function  allocates  a per-process timer using the specified clock as the timing base. The timer_create function returns
       timer_id, which identifies the timer in timer requests. The timer ID is unique within the calling process until the timer is  deleted.  The
       timer is unarmed when first returned from a call to timer_create. To arm the timer, use the timer_settime function.

       The  evp  argument,  if	non-NULL,  points  to a sigevent structure, which defines the asynchronous notification that occurs when the timer
       expires.  If the sigev_notify member of evp is SIGEV_SIGNAL, the structure must contain the signal number and data value  to  send  to  the
       process when the timer expires. If the sigev_notify member is SIGEV_NONE, no notification is sent.

       SIGALRM is the default signal for CLOCK_REALTIME if the evp argument is NULL.

       The  maximum  number  of  timers  supported  per  process  (TIMER_MAX) is defined in the <sys/rt_limits.h> header file, which is indirectly
       included through <time.h>.

       Timers are not inherited across fork calls. An exec call disarms and deletes a timer.

RETURN VALUES
       Upon successful completion, a value of 0 (zero) is returned.  The timer_create function also returns, in timerid, a pointer to the timer ID
       that has been created.

       An unsuccessful call returns -1, and errno is set to indicate the error type.

ERRORS
       The timer_create function fails under the following conditions:

       [EAGAIN]       The system lacks sufficient signal queuing resources to honor the request.

		      The calling process has already created all of the timers it is allowed.

       [EINVAL]       The specified clock ID is not defined.

RELATED INFORMATION
       Functions: clock_getres(3), clock_gettime(3), clock_settime(3), timer_delete(3), timer_gettime(3), timer_settime(3)

       Guide to Realtime Programming delim off

																   timer_create(3)