* sigproc.cc (cygWFMO): Don't assume that cancellable event is always

available.
* fhandler_dsp.cc (fhandler_dev_dsp::Audio_out::waitforspace): Use cygWFMO
instead of WaitForMultipleObjects.
(fhandler_dev_dsp::Audio_in::waitfordata): Ditto.
* fhandler_fifo.cc (fhandler_fifo::wait): Ditto.
* fhandler_serial.cc (fhandler_serial::raw_read): Ditto.
(fhandler_serial::raw_write): Ditto.
* fhandler_tty.cc (fhandler_pty_slave::read): Ditto.
* select.cc (cygwin_select): Ditto for degenerate case.

winsup/cygwin/fhandler_fifo.cc

@@ -210,15 +210,13 @@ fhandler_fifo::wait (HANDLE h)
   else
     what = "overlapped event";
 #endif
-  HANDLE w4[3] = {h, signal_arrived, pthread::get_cancel_event ()};
-
   /* Set the wait to zero for non-blocking I/O-related events. */
   DWORD wait = ((h == read_ready || h == write_ready)
 		&& get_flags () & O_NONBLOCK) ? 0 : INFINITE;
 
   debug_only_printf ("waiting for %s", what);
   /* Wait for the event.  Set errno, as appropriate if something goes wrong. */
-  switch (WaitForMultipleObjects (3, w4, false, wait))
+  switch (cygWFMO (1, wait))
     {
     case WAIT_OBJECT_0:
       debug_only_printf ("successfully waited for %s", what);