opensolaris man page for ualarm

ualarm(3C)						   Standard C Library Functions 						ualarm(3C)

NAME
       ualarm - schedule signal after interval in microseconds

SYNOPSIS
       #include <unistd.h>

       useconds_t ualarm(useconds_t useconds, useconds_t interval);

DESCRIPTION
       The  ualarm()  function causes the SIGALRM signal to be generated for the calling process after the number of real-time microseconds speci-
       fied by the useconds argument has elapsed.  When the interval argument is non-zero, repeated timeout notification occurs with a	period	in
       microseconds specified by the interval argument. If the notification signal, SIGALRM, is not caught or ignored, the calling process is ter-
       minated.

       Because of scheduling delays, resumption of execution when the signal is caught may be delayed an arbitrary amount of time.

       Interactions between ualarm() and either alarm(2) or sleep(3C) are unspecified.

RETURN VALUES
       The ualarm() function returns the number of microseconds remaining from the previous ualarm() call.  If	no  timeouts  are  pending  or	if
       ualarm() has not previously been called, ualarm() returns 0.

ERRORS
       No errors are defined.

USAGE
       The ualarm() function is a simplified interface to setitimer(2), and uses the ITIMER_REAL interval timer.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       alarm(2), setitimer(2), sighold(3C), signal(3C), sleep(3C), usleep(3C), attributes(5), standards(5)

SunOS 5.11							    14 Aug 2002 							ualarm(3C)