process.wait blocks GIL on Windows

[Jason Thomas]

It appears like this was "fixed" by issue #68 but I'm still seeing the same thing. Here is my example program on Windows 7, Ruby 2.2.4, childprocess 0.5.9:

require 'childprocess'

def run_process(command)
  r, w = IO.pipe
  process = ChildProcess.build("cmd.exe", "/c", command)
  process.io.stdout = process.io.stderr = w
  process.start
  #process.wait # This blocks the second thread from running
  sleep 0.1 while process.alive? # This logic works
  w.close # Close the IO pipe
  # Return output, status just like Open3
  return [r.read, process.exit_code]
end

threads = []
threads << Thread.new { o,s = run_process("ping 123.123.123.123"); puts "1:#{Time.now} s:#{s} o:#{o}" }
threads << Thread.new { o,s = run_process("dir"); puts "2:#{Time.now} s:#{s} o:#{o}" }
threads.each {|t| t.join }

[Shane da Silva]

Closing due to staleness. If this is still an issue on a recent version of ChildProcess (e.g. 0.9.0), please feel free to reopen!