Query: ualarm
OS: osx
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
UALARM(3) BSD Library Functions Manual UALARM(3)NAMEualarm -- schedule signal after specified timeLIBRARYStandard C Library (libc, -lc)SYNOPSIS#include <unistd.h> useconds_t ualarm(useconds_t useconds, useconds_t interval);DESCRIPTIONThis is a simplified interface to setitimer(2). The ualarm() function waits a count of useconds before asserting the terminating signal SIGALRM. System activity or time used in processing the call may cause a slight delay. If the interval argument is non-zero, the SIGALRM signal will be sent to the process every interval microseconds after the timer expires (e.g., after useconds number of microseconds have passed). Due to a setitimer(2) restriction, the maximum number of useconds and interval is limited to 100,000,000,000,000 (in case this value fits in the unsigned integer).RETURN VALUESWhen the signal has successfully been caught, ualarm() returns the amount of time left on the clock.NOTESA microsecond is 0.000001 seconds.SEE ALSOgetitimer(2), setitimer(2), sigpause(2), sigvec(2), alarm(3), signal(3), sleep(3), usleep(3)HISTORYThe ualarm() function appeared in 4.3BSD.BSDApril 19, 1994 BSD
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