graceful shutdown

src/emu/emulator.cc

@@ -76,7 +76,9 @@ void Emulator::Run(const char *path) {
   auto scheduler_remaining = std::chrono::nanoseconds(0);
   auto frame_remaining = std::chrono::nanoseconds(0);
 
-  while (true) {
+  running_ = true;
+
+  while (running_) {
     current_time = std::chrono::high_resolution_clock::now();
     delta_time = current_time - last_time;
     last_time = current_time;
@@ -231,6 +233,10 @@ void Emulator::PumpEvents() {
       case WE_RESIZE: {
         rb_->ResizeVideo(ev.resize.width, ev.resize.height);
       } break;
+
+      case WE_QUIT: {
+        running_ = false;
+      } break;
     }
   }
 }

src/emu/emulator.h

@@ -36,6 +36,7 @@ class Emulator {
   trace::TraceWriter *trace_writer_;
   std::chrono::nanoseconds deltas_[MAX_SCHEDULER_DELTAS];
   unsigned delta_seq_;
+  bool running_;
 };
 }
 }

src/sys/window.cc

@@ -32,6 +32,12 @@ static inline WindowEvent MakeResizeEvent(int width, int height) {
   return ev;
 }
 
+static inline WindowEvent MakeQuitEvent() {
+  WindowEvent ev;
+  ev.type = WE_QUIT;
+  return ev;
+}
+
 Window::Window()
     : window_(nullptr),
       width_(DEFAULT_WIDTH),
@@ -736,7 +742,7 @@ void Window::PumpSDLEvents() {
         break;
 
       case SDL_QUIT:
-        exit(EXIT_SUCCESS);
+        QueueEvent(MakeQuitEvent());
         break;
     }
   }

src/sys/window.h

@@ -18,6 +18,7 @@ enum WindowEventType {
   WE_KEY,
   WE_MOUSEMOVE,
   WE_RESIZE,
+  WE_QUIT,
 };
 
 struct WindowEvent {
@@ -36,10 +37,6 @@ struct WindowEvent {
       int width;
       int height;
     } resize;
-
-    struct {
-      const char *buffer;
-    } tty;
   };
 };