commit ab6918a

Add maus_event_wait as a cheaper alternative to polling

 1@@ -97,5 +97,10 @@ void maus_log(FILE* fd, const char* fmt, ...);
 2    note: can burn cpu cycles */
 3 bool maus_event_poll(Maus* mw, MausEvent* ev);
 4 
 5+/* poll for events then fill `ev` with retrieved events.
 6+   returns true if event polled, else false
 7+   note: thread goes to sleep until an event arrives */
 8+void maus_event_wait(Maus* mw, MausEvent* ev);
 9+
10 #endif /* MAUSWIN_H */
11 

 1@@ -138,14 +138,26 @@ Maus* maus_init(const char* title, int x, int y, int width, int height)
 2 
 3 bool maus_event_poll(Maus* mw, MausEvent* ev)
 4 {
 5-	if (!XPending(mw->display))
 6-		return false;
 7+	XEvent xev;
 8+	while (XPending(mw->display)) {
 9+		XNextEvent(mw->display, &xev);
10+		ev->type = MAUS_EV_NONE;
11+		if (handle_event(&xev, ev, mw))
12+			return true;
13 
14-	ev->type = MAUS_EV_NONE;
15+	}
16 
17-	XEvent xev;
18-	XNextEvent(mw->display, &xev);
19+	return false;
20+}
21 
22-	return handle_event(&xev, ev, mw);
23+void maus_event_wait(Maus* mw, MausEvent* ev)
24+{
25+	XEvent xev;
26+	for (;;) {
27+		XNextEvent(mw->display, &xev);
28+		ev->type = MAUS_EV_NONE;
29+		if (handle_event(&xev, ev, mw))
30+			return;
31+	}
32 }
33 

 1@@ -30,9 +30,17 @@ int main(void)
 2 	maus_create_window(mw);
 3 
 4 	MausEvent ev;
 5+	/* waiting -- used in applications
 6+	for (;;) {
 7+		maus_event_wait(mw, &ev);
 8+		handle_ev(&ev, mw);
 9+	}
10+	*/
11+
12+	/* constant polling -- used in games */
13 	for (;;) {
14 		while (maus_event_poll(mw, &ev))
15-			handle_ev(&ev, mw);
16+			(void) handle_ev(&ev, mw);
17 	}
18 
19 	maus_close(mw);