Class: CSP::Channel

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/csp/channel.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Channel

Returns a new instance of Channel.



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# File 'lib/csp/channel.rb', line 8

def initialize
  @readers = []
  @writers = []
end

Instance Method Details

#<<(message) ⇒ Object 



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# File 'lib/csp/channel.rb', line 49

def << message
  write(message)
  return self
end

#each ⇒ Object 



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# File 'lib/csp/channel.rb', line 54

def each
  yield read while true
end

#read(options = {}) ⇒ Object 



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# File 'lib/csp/channel.rb', line 13

def read(options = {})
  message = callcc do |cont|
    @readers << cont

    if @writers.empty?
      if options[:callback]
        return
      else
        CSP.run
      end
    else
      @writers.shift.call
    end
  end

  if options[:callback]
    options[:callback].call(message)
  else
    return message
  end
end

#write(message) ⇒ Object 



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# File 'lib/csp/channel.rb', line 35

def write(message)
  if @readers.empty?
    callcc do |cont|
      @writers << cont
      CSP.run
    end
  end

  callcc do |cont|
    CSP.enqueue(cont)
    @readers.shift.call(message)
  end
end