uxn

commit 63108c178acb6a6c9ac949c55dee34e9b1b03ad5
parent b5fa665cdbd76122bf08f87655eed4da2b729ec5
Author: Devine Lu Linvega <aliceffekt@gmail.com>
Date:   Thu, 26 Jan 2023 10:56:14 -0800

Tighter run

Diffstat:
M
src/uxnemu.c
 | 
24
++++++++----------------

1 file changed, 8 insertions(+), 16 deletions(-)
diff --git a/src/uxnemu.c b/src/uxnemu.c
@@ -432,28 +432,20 @@ handle_events(Uxn *u)
 static int
 run(Uxn *u)
 {
-	Uint64 now = SDL_GetPerformanceCounter(), frame_end, frame_interval = SDL_GetPerformanceFrequency() / 60;
-	for(;;) {
-		/* .System/halt */
-		if(u->dev[0x0f])
-			return error("Run", "Ended.");
-		frame_end = now + frame_interval;
+	Uint64 now = SDL_GetPerformanceCounter(), frame_end = now, frame_interval = SDL_GetPerformanceFrequency() / 60;
+	for(;!u->dev[0x0f]; now = SDL_GetPerformanceCounter()) {
 		exec_deadline = now + deadline_interval;
 		if(!handle_events(u))
 			return 0;
-		uxn_eval(u, GETVEC(&u->dev[0x20]));
+		if (((Sint64)(frame_end - SDL_GetPerformanceCounter())) >= 0) {
+			frame_end = now + frame_interval;
+			uxn_eval(u, GETVEC(&u->dev[0x20]));
+		}
 		if(uxn_screen.fg.changed || uxn_screen.bg.changed)
 			redraw();
-		now = SDL_GetPerformanceCounter();
-		if(u->dev[0x20]) {
-			if(!BENCH && ((Sint64)(frame_end - now)) > 0) {
-				SDL_Delay((frame_end - now) / ms_interval);
-				now = frame_end;
-			}
-		} else
-			SDL_WaitEvent(NULL);
+		SDL_WaitEventTimeout(NULL, GETVEC(&u->dev[0x20]) ? (frame_end - SDL_GetPerformanceCounter()) / ms_interval : 0x100000);
 	}
-	return error("SDL_WaitEvent", SDL_GetError());
+	return error("Run", "Ended.");
 }
 
 int