85 lines
2.1 KiB
Ruby
85 lines
2.1 KiB
Ruby
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#--
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#
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# Author:: Francis Cianfrocca (gmail: blackhedd)
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# Homepage:: http://rubyeventmachine.com
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# Date:: 25 Aug 2007
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#
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# See EventMachine and EventMachine::Connection for documentation and
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# usage examples.
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#
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#----------------------------------------------------------------------------
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#
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# Copyright (C) 2006-07 by Francis Cianfrocca. All Rights Reserved.
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# Gmail: blackhedd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of either: 1) the GNU General Public License
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# as published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version; or 2) Ruby's License.
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#
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# See the file COPYING for complete licensing information.
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#
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#---------------------------------------------------------------------------
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#
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#
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module EventMachine
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# Support for Erlang-style processes.
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#
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class SpawnedProcess
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# Send a message to the spawned process
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def notify *x
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me = self
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EM.next_tick {
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# A notification executes in the context of this
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# SpawnedProcess object. That makes self and notify
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# work as one would expect.
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#
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y = me.call(*x)
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if y and y.respond_to?(:pull_out_yield_block)
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a,b = y.pull_out_yield_block
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set_receiver a
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self.notify if b
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end
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}
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end
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alias_method :resume, :notify
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alias_method :run, :notify # for formulations like (EM.spawn {xxx}).run
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def set_receiver blk
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(class << self ; self ; end).class_eval do
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remove_method :call if method_defined? :call
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define_method :call, blk
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end
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end
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end
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# @private
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class YieldBlockFromSpawnedProcess
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def initialize block, notify
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@block = [block,notify]
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end
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def pull_out_yield_block
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@block
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end
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end
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# Spawn an erlang-style process
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def self.spawn &block
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s = SpawnedProcess.new
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s.set_receiver block
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s
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end
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# @private
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def self.yield &block
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return YieldBlockFromSpawnedProcess.new( block, false )
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end
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# @private
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def self.yield_and_notify &block
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return YieldBlockFromSpawnedProcess.new( block, true )
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end
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end
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