[UI] Loop thread to main thread WindowedAppContext

src/xenia/ui/windowed_app_main_posix.cc

@@ -0,0 +1,64 @@
+/**
+ ******************************************************************************
+ * 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. *
+ ******************************************************************************
+ */
+
+#include <gtk/gtk.h>
+#include <cstdio>
+#include <cstdlib>
+#include <memory>
+
+#include "xenia/base/cvar.h"
+#include "xenia/base/logging.h"
+#include "xenia/ui/windowed_app.h"
+#include "xenia/ui/windowed_app_context_gtk.h"
+
+extern "C" int main(int argc_pre_gtk, char** argv_pre_gtk) {
+  // Initialize GTK+, which will handle and remove its own arguments from argv.
+  // Both GTK+ and Xenia use --option=value argument format (see man
+  // gtk-options), however, it's meaningless to try to parse the same argument
+  // both as a GTK+ one and as a cvar. Make GTK+ options take precedence in case
+  // of a name collision, as there's an alternative way of setting Xenia options
+  // (the config).
+  int argc_post_gtk = argc_pre_gtk;
+  char** argv_post_gtk = argv_pre_gtk;
+  if (!gtk_init_check(&argc_post_gtk, &argv_post_gtk)) {
+    // Logging has not been initialized yet.
+    std::fputs("Failed to initialize GTK+\n", stderr);
+    return EXIT_FAILURE;
+  }
+
+  int result;
+
+  {
+    xe::ui::GTKWindowedAppContext app_context;
+
+    std::unique_ptr<xe::ui::WindowedApp> app =
+        xe::ui::GetWindowedAppCreator()(app_context);
+
+    cvar::ParseLaunchArguments(argc_post_gtk, argv_post_gtk,
+                               app->GetPositionalOptionsUsage(),
+                               app->GetPositionalOptions());
+
+    // Initialize logging. Needs parsed cvars.
+    xe::InitializeLogging(app->GetName());
+
+    if (app->OnInitialize()) {
+      app_context.RunMainGTKLoop();
+      result = EXIT_SUCCESS;
+    } else {
+      result = EXIT_FAILURE;
+    }
+
+    app->InvokeOnDestroy();
+  }
+
+  // Logging may still be needed in the destructors.
+  xe::ShutdownLogging();
+
+  return result;
+}