Make sure each thread sees its expose event.

Having a thread call XNextEvent may cause other threads to miss their
initial expose event, blocking them for a long time. Use the existing
predicate function and XIfEvent to wait for precisely the right expose event.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ico.c b/ico.c
index 8b93b10..0c75962 100644
--- a/ico.c
+++ b/ico.c
@@ -920,7 +920,7 @@ do_ico_window(void *ptr)
 		printf("thread %x waiting for Expose\n", xthread_self());
 #endif
 		for (;;) {
-		    XNextEvent(dpy, &xev);
+		    XIfEvent(dpy, &xev, predicate, (XPointer) closure->draw_window);
 		    if (xev.type == Expose)
 			break;
 		}