Handle a signal: Difference between revisions

</pre>

=={{header|Crystal}}==

<lang ruby>start = Time.utc

ch = Channel(Int32 | Symbol).new

spawn do

i = 0

loop do

sleep 1

ch.send(i += 1)

end

end

Signal::INT.trap do

Signal::INT.reset

ch.send(:kill)

end

loop do

x = ch.receive

break if x == :kill

puts x

end

elapsed = Time.utc - start

puts "Program has run for %5.3f seconds." % elapsed.total_seconds</lang>

<pre>

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^CProgram has run for 5.093 seconds.