Allow us to signal that we should exit

include/vm_screen.h

@@ -44,6 +44,11 @@ typedef struct {
      */
     bool dirty;
 
+    /*
+     * Should we exit (the next chance we get)?
+     */
+    bool should_exit;
+
 } vm_screen;
 
 extern bool vm_screen_active(vm_screen *);

src/vm_event.c

@@ -49,6 +49,7 @@ vm_event_keyboard(vm_event *ev)
             ev->screen->key_pressed = false;
 
             if (ch == SDLK_ESCAPE) {
+                ev->screen->should_exit = true;
             }
 
             break;

src/vm_screen.c

@@ -64,6 +64,7 @@ vm_screen_create()
     screen->last_key = '\0';
     screen->key_pressed = false;
     screen->dirty = false;
+    screen->should_exit = false;
 
     screen->window = NULL;
     screen->render = NULL;
@@ -170,6 +171,13 @@ bool
 vm_screen_active(vm_screen *scr)
 {
     vm_event_poll(scr);
+
+    // If something happened in the event loop that caused the user to
+    // signal an exit, then returning false here will do the trick
+    if (scr->should_exit) {
+        return false;
+    }
+
     return true;
 }