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# In lieu of some proper unit tests, this example
# checks that vwait can be interrupted by handled signals
set f [open "/dev/urandom" r]
set count 0
$f ndelay 1
signal handle SIGALRM
$f readable {
incr count [string bytelength [read $f 100]]
}
set start [clock millis]
# Even though nothing sets 'done', vwait will return on the signal
alarm 0.5
vwait -signal done
set end [clock millis]
puts "Read $count bytes and received [signal check -clear] after $($end - $start)ms"
$f close
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