class Async2

# File lib/async2.rb, line 8
def initialize wait = 0.01
  @wait = wait
  @read = {}
  @write = {}
  @t = Thread.new do
    loop do
      begin
        read, write = IO.select @read.keys, @write.keys, nil, 0
        read&.each { |io| @read[io].call(io); @read.delete io }
        write&.each { |io| @write[io].call(io); @write.delete io }
        sleep wait unless read || write
      rescue => err
        STDERR.puts err, err.backtrace
        raise
        retry
      end
    end
  end
end

# File lib/async2.rb, line 28
def read(io, &b)
  @read[io] = b
end

# File lib/async2.rb, line 32
def write(io, &b)
  @write[io] = b
end