Path: | lib/more/facets/coroutine.rb |
Last Update: | Thu Oct 22 14:14:40 +0000 2009 |
Coroutines are program components like subroutines. Coroutines are more generic and flexible than subroutines, but are less widely used in practice. Coroutines were first introduced natively in Simula. Coroutines are well suited for implementing more familiar program components such as cooperative tasks, iterators, infinite lists, and pipes.
This mixin solely depends on method read(n), which must be defined in the class/module where you mix in this module.
count = (ARGV.shift || 1000).to_i input = (1..count).map { (rand * 10000).round.to_f / 100} Producer = Coroutine.new do |me| loop do 1.upto(6) do me[:last_input] = input.shift me.resume(Printer) end input.shift # discard every seventh input number end end Printer = Coroutine.new do |me| loop do 1.upto(8) do me.resume(Producer) if Producer[:last_input] print Producer[:last_input], "\t" Producer[:last_input] = nil end me.resume(Controller) end puts end end Controller = Coroutine.new do |me| until input.empty? do me.resume(Printer) end end Controller.run
Copyright (c) 2005 Florian Frank
Ruby License
This module is free software. You may use, modify, and/or redistribute this software under the same terms as Ruby.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.