SETTIMER(3spp)     RISC/os Reference Manual      SETTIMER(3spp)



NAME
     set_timer - schedule longjmp for time in future

SYNOPSIS
     #include <saio/setjmp.h>

     int *timerjmpbuf;

     settimer(secs)
     unsigned secs;

DESCRIPTION
     _set_timer arranges for a longjmp (see setjmp(3spp)) to the
     jmp_buf pointed to by _timer_jmpbuf to occur secs seconds in
     the future.  If _timer_jmpbuf is zero at the time the timer
     expires, the timer is ignored.  Timers can be cancelled by a
     call to _set_timer with an argument of 0.

     Timers are implemented by the routine _scandevs; for timers
     to operate correctly, _scandevs must be called periodically
     during the period of the timer.  _scandevs is also called by
     the standalone I/O routines, so _scandevs need not be called
     if I/O is performed frequently during the period the timer
     is in effect.

SEE ALSO
     nofault(3spp), setjmp(3spp)




























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