Class: SurroGate::Selector

Inherits:
Object
  • Object
show all
Defined in:
lib/surro-gate/selector.rb,
ext/surro-gate/selector_ext.c

Instance Method Summary collapse

Constructor Details

#initialize(logger) ⇒ Selector

Returns a new instance of Selector.



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# File 'ext/surro-gate/selector_ext.c', line 91

def initialize(logger)
  @logger = logger

  @pairing = Concurrent::Array.new
  @sockets = Concurrent::Array.new
  @reads = Concurrent::Array.new
  @writes = Concurrent::Array.new

  @mutex = Mutex.new
end

Instance Method Details

#each_ready ⇒ Object 



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# File 'ext/surro-gate/selector_ext.c', line 197

def each_ready
  @pairing.each do |pair|
    next unless pair.ready?

    yield(pair.left, pair.right)

    pair.instance_variable_set(:@rd_rdy, false)
    pair.instance_variable_set(:@wr_rdy, false)

    @reads.push(pair.left)
    @writes.push(pair.right)
  end
end

#pop(sockets) ⇒ Object 



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# File 'ext/surro-gate/selector_ext.c', line 134

def pop(*sockets)
  [@sockets, @reads, @writes].each do |arr|
    arr.delete_if { |sock| sockets.include?(sock) }
  end

  @pairing.delete_if { |pair| pairing_compare(pair, sockets) }

  nil
end

#push(left, right) ⇒ Object

Raises:

  • (TypeError) 


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# File 'ext/surro-gate/selector_ext.c', line 101

def push(left, right)
  raise TypeError unless left.is_a?(IO) && right.is_a?(IO)
  raise ArgumentError if @pairing.detect { |pair| [left, right].include?(pair.left) || [left, right].include?(pair.right) }

  left_to_right = SurroGate::Pair.new(left, right)
  right_to_left = SurroGate::Pair.new(right, left)

  # The method can be called from a different thread
  @mutex.synchronize do
    @pairing.push(left_to_right, right_to_left)

    @sockets.push(left, right)
    @reads.push(left, right)
    @writes.push(left, right)
  end

  true
end

#select(timeout) ⇒ Object 



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# File 'ext/surro-gate/selector_ext.c', line 148

def select(timeout)
  begin
    read, write, error = @mutex.synchronize { IO.select(@reads, @writes, @sockets, timeout * 0.001) }
  rescue IOError
    # One of the sockets is closed, Pair#ready? will catch it
  end

  error.to_a.each do
    ltr = find_pairing(sock, :left)
    rtl = find_pairing(sock, :right)

    [ltr, rtl].each do |pair|
      %i[@rd_rdy @wr_rdy].each do |ivar|
        pair.instance_variable_set(ivar, true)
      end
    end
  end

  read.to_a.each do |sock|
    @reads.delete(sock)
    find_pairing(sock, :left).instance_variable_set(:@rd_rdy, true)
  end

  write.to_a.each do |sock|
    @writes.delete(sock)
    find_pairing(sock, :right).instance_variable_set(:@wr_rdy, true)
  end

  read.to_a.length + write.to_a.length
end