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module Vedeu
# Provides the main loop for a Vedeu application.
#
# Each time Vedeu starts one cycle in the application loop, it triggers the
# `:tick` event. A completion of that cycle will trigger `:tock`. This can be
# used by the client application for timing amongst other things.
#
class MainLoop
trap('SIGTERM') { stop! }
trap('TERM') { stop! }
trap('INT') { stop! }
# Start the main loop.
#
# @param block [Proc]
# @return [void]
def self.start!(&block)
@started = true
@loop = true
while(@loop) do
Vedeu.trigger(:tick)
yield
safe_exit_point!
end
rescue VedeuInterrupt
end
# Signal that we wish to terminate the running application.
#
# @return [void]
def self.stop!
@loop = false
end
private
# Check the application has started and we wish to continue running.
#
# @raise [VedeuInterrupt] When we wish to terminate the running application.
# @return [void]
def self.safe_exit_point!
if @started && !@loop
fail VedeuInterrupt
else
Vedeu.trigger(:tock)
end
end
end # MainLoop
end # Vedeu
Version data entries
7 entries across 7 versions & 1 rubygems