  UCX TCP socket non-blocking mode? 
 The Question is:
 
How I can set TCP socket in non-blocking mode?
 
 
 The Answer is:
 
  See UCX$EXAMPLES:UCX$IOCTL_ROUTINE.C, and see set_socket_non_blocking().
 
  Or set the UCX$M_MSG_NBIO bit in the flags argument of send().
 
  And also, sys$qio and ASTs can work quite nicely here.
 
