Module: Rbgo::Channel

Included in:
NetworkServiceFactory
Defined in:
lib/rbgo/select_chan.rb

Defined Under Namespace

Modules: Chan Classes: BufferChan, NonBufferChan

Class Method Summary collapse

Class Method Details

.on_read(chan:, &blk) ⇒ Object

on_read

Raises:

  • (ArgumentError) 


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# File 'lib/rbgo/select_chan.rb', line 339

def on_read(chan:, &blk)
  raise ArgumentError.new('chan must be a Chan') unless chan.is_a? Chan
  op = Proc.new do
    res, ok = chan.deq(true)
    if blk.nil?
      [res, ok]
    else
      blk.call(res, ok)
    end
  end
  op.define_singleton_method(:register) do |cond|
    chan.send :register, observer: cond, mode: :r
  end
  op.define_singleton_method(:unregister) do |cond|
    chan.send :unregister, observer: cond, mode: :r
  end
  op
end

.on_write(chan:, obj:, &blk) ⇒ Object

on_write

Raises:

  • (ArgumentError) 


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# File 'lib/rbgo/select_chan.rb', line 364

def on_write(chan:, obj:, &blk)
  raise ArgumentError.new('chan must be a Chan') unless chan.is_a? Chan
  op = Proc.new do
    res = chan.enq(obj, true)
    res = blk.call unless blk.nil?
    res
  end

  op.define_singleton_method(:register) do |cond|
    chan.send :register, observer: cond, mode: :w
  end
  op.define_singleton_method(:unregister) do |cond|
    chan.send :unregister, observer: cond, mode: :w
  end
  op
end

.select_chan(*ops) ⇒ Object

select_chan



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# File 'lib/rbgo/select_chan.rb', line 299

def select_chan(*ops)
  ops.shuffle!

  mutex = Mutex.new
  cond  = ConditionVariable.new

  loop do

    ops.each do |op|
      begin
        return op.call
      rescue ThreadError
      end
    end

    return yield if block_given?

    ops.each do |op|
      op.register(cond)
    end

    mutex.synchronize do
      cond.wait mutex
    end

  end

ensure

  ops.each do |op|
    op.unregister(cond)
  end

end