# File lib/puppet/external/event-loop/event-loop.rb, line 238
238:   def will_block?
239:     if respond_to?(:fcntl) and defined?(Fcntl) and defined?(Fcntl::F_GETFL) and defined?(Fcntl::O_NONBLOCK)
240:       fcntl(Fcntl::F_GETFL, 0) & Fcntl::O_NONBLOCK == 0
241:     end
242:   end