[UI] Loop thread to main thread WindowedAppContext

src/xenia/ui/windowed_app_context_gtk.h

@@ -0,0 +1,46 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2021 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_UI_WINDOWED_APP_CONTEXT_GTK_H_
+#define XENIA_UI_WINDOWED_APP_CONTEXT_GTK_H_
+
+#include <glib.h>
+#include <mutex>
+
+#include "xenia/ui/windowed_app_context.h"
+
+namespace xe {
+namespace ui {
+
+class GTKWindowedAppContext final : public WindowedAppContext {
+ public:
+  GTKWindowedAppContext() = default;
+  ~GTKWindowedAppContext();
+
+  void NotifyUILoopOfPendingFunctions() override;
+
+  void PlatformQuitFromUIThread() override;
+
+  void RunMainGTKLoop();
+
+ private:
+  static gboolean PendingFunctionsSourceFunc(gpointer data);
+
+  static gboolean QuitSourceFunc(gpointer data);
+
+  std::mutex pending_functions_idle_pending_mutex_;
+  guint pending_functions_idle_pending_ = 0;
+
+  guint quit_idle_pending_ = 0;
+};
+
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_WINDOWED_APP_CONTEXT_GTK_H_