initialize parts of SDL only when required, and return errors

source/prosperon.c

@@ -506,7 +506,6 @@ void actor_free(prosperon_rt *actor)
 /* Timer callback adds an event to the queue under evt_mutex. */
 Uint32 actor_timer_cb(prosperon_rt *actor, SDL_TimerID id, Uint32 interval)
 {
-  printf("firing timer %u\n", id);
   SDL_LockMutex(actor->msg_mutex);
   int idx = hmgeti(actor->timers, id);
   if (idx == -1) goto END;
@@ -541,8 +540,6 @@ JSValue js_actor_delay(JSContext *js, JSValue self, int argc, JSValue *argv)
   
   Uint32 id = SDL_AddTimerNS(ns, actor_timer_cb, actor);
   
-  printf("started timer %u for %g secs\n", id, seconds);
-
   SDL_LockMutex(actor->msg_mutex);
   JSValue cb = JS_DupValue(js, argv[0]);
   hmput(actor->timers, id, cb);
@@ -1343,7 +1340,10 @@ int main(int argc, char **argv)
     }
   }
 
-  SDL_Init(SDL_INIT_EVENTS);// | SDL_INIT_VIDEO | SDL_INIT_AUDIO);
+  if (!SDL_Init(SDL_INIT_EVENTS)) {
+    printf("CRITICAL ERROR: %s\n", SDL_GetError());
+    exit(1);
+  }
   queue_event = SDL_RegisterEvents(1);
 
   int cores = SDL_GetNumLogicalCPUCores();

source/qjs_sdl.c

@@ -465,6 +465,9 @@ static const JSCFunctionListEntry js_SDL_AudioStream_funcs[] = {
 };
 
 JSValue js_sdl_audio_use(JSContext *js) {
+  if (!SDL_Init(SDL_INIT_AUDIO))
+    return JS_ThrowInternalError(js, "Unable to initialize audio subsystem: %s", SDL_GetError());
+    
   QJSCLASSPREP_FUNCS(SDL_AudioStream)
   
   JSValue mod = JS_NewObject(js);