alarm - execute a subroutine after a specified time
integer*4 function alarm (time, sbrtn) integer*4 time external sbrtn
integer*4 time /8/ external sbrtn nseconds = alarm(time,sbrtn)
This routine arranges for subroutine sbrtn to be called after time seconds. If time is 0, the alarm is turned off, and no routine is called. The returned value is the time remaining on the last alarm.
A subroutine cannot pass its own name to alarm.
The alarm routine generates signals that could interfere with any I/O. The called routine, sbrtn, must not do any I/O itself.
Calling alarm() from a parallelized or multi-threaded program may have unpredictable results.
libfsu.a