Implemented graceful closing of the GLFW window, along with emulation.

src/citra/citra.cpp

@@ -34,7 +34,7 @@ int __cdecl main(int argc, char **argv) {
         return -1;
     }
 
-    while(true) {
+    while (emu_window->IsOpen()) {
         Core::RunLoop();
     }
 

src/citra/emu_window/emu_window_glfw.cpp

@@ -29,6 +29,11 @@ void EmuWindow_GLFW::OnKeyEvent(GLFWwindow* win, int key, int scancode, int acti
     HID_User::PadUpdateComplete();
 }
 
+/// Whether the window is still open, and a close request hasn't yet been sent
+const bool EmuWindow_GLFW::IsOpen() {
+    return glfwWindowShouldClose(m_render_window) != 0;
+}
+
 /// EmuWindow_GLFW constructor
 EmuWindow_GLFW::EmuWindow_GLFW() {
     keyboard_id = KeyMap::NewDeviceId();

src/citra/emu_window/emu_window_glfw.h

@@ -27,6 +27,9 @@ public:
 
     static void OnKeyEvent(GLFWwindow* win, int key, int scancode, int action, int mods);
 
+    /// Whether the window is still open, and a close request hasn't yet been sent
+    const bool IsOpen();
+
     void ReloadSetKeymaps() override;
 
 private: