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Fix startup display on Cygwin

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* src/xterm.c (x_make_frame_visible) [CYGWIN]: Restore code that
forces input to be read.  (Bug#24091)
This commit is contained in:
Ken Brown 2017-10-27 13:48:46 -04:00
parent 3926c5ad83
commit e8636ac8cc
1 changed files with 16 additions and 0 deletions
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16
src/xterm.c
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@ -11504,6 +11504,22 @@ x_make_frame_visible (struct frame *f)
/* Try to wait for a MapNotify event (that is what tells us when a /* Try to wait for a MapNotify event (that is what tells us when a
frame becomes visible). */ frame becomes visible). */
#ifdef CYGWIN
/* On Cygwin, which uses input polling, we need to force input to
be read. See
http://lists.gnu.org/archive/html/emacs-devel/2013-12/msg00351.html
and https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24091#131.
Fake an alarm signal to let the handler know that there's
something to be read.
It could be confusing if a real alarm arrives while processing
the fake one. Turn it off and let the handler reset it. */
int old_poll_suppress_count = poll_suppress_count;
poll_suppress_count = 1;
poll_for_input_1 ();
poll_suppress_count = old_poll_suppress_count;
#endif
x_wait_for_event (f, MapNotify); x_wait_for_event (f, MapNotify);
} }
} }