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



NAME
     scandevs - scan devices

SYNOPSIS
     int scandevs()

DESCRIPTION
     _scandevs scans open devices looking for pending input and
     checks the real-time clock for expiring timers.  _scandevs
     also moves a pattern through the CPU board leds.  _scandevs
     should be called periodically in code sequences where input
     can exceed the buffer capabilities of the hardware device or
     where "interrupt" characters from the console should take
     effect as soon as possible.  Code that uses the
     set_timer(3spp) facilities should also call _scandevs
     periodically.  The standaloneI/O routines read (3spp) and
     write (3spp) call _scandevs frequently, so code that uses
     these routines often need not explicitly call _scandevs.

SEE ALSO
     set_timer(3spp)


































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