[UI] Loop thread to main thread WindowedAppContext

src/xenia/ui/windowed_app_context_android.cc

@@ -0,0 +1,67 @@
+/**
+ ******************************************************************************
+ * 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 "xenia/ui/windowed_app_context_android.h"
+
+#include <android/native_activity.h>
+
+#include "xenia/base/assert.h"
+#include "xenia/ui/windowed_app.h"
+
+namespace xe {
+namespace ui {
+
+void AndroidWindowedAppContext::StartAppOnNativeActivityCreate(
+    ANativeActivity* activity, [[maybe_unused]] void* saved_state,
+    [[maybe_unused]] size_t saved_state_size,
+    std::unique_ptr<WindowedApp> (*app_creator)(
+        WindowedAppContext& app_context)) {
+  AndroidWindowedAppContext* app_context =
+      new AndroidWindowedAppContext(activity);
+  // The pointer is now held by the Activity as its ANativeActivity::instance,
+  // until the destruction.
+  if (!app_context->InitializeApp(app_creator)) {
+    delete app_context;
+    ANativeActivity_finish(activity);
+  }
+}
+
+AndroidWindowedAppContext::~AndroidWindowedAppContext() {
+  // TODO(Triang3l): Unregister activity callbacks.
+  activity_->instance = nullptr;
+}
+
+void AndroidWindowedAppContext::NotifyUILoopOfPendingFunctions() {
+  // TODO(Triang3l): Request message processing in the UI thread.
+}
+
+void AndroidWindowedAppContext::PlatformQuitFromUIThread() {
+  ANativeActivity_finish(activity);
+}
+
+AndroidWindowedAppContext::AndroidWindowedAppContext(ANativeActivity* activity)
+    : activity_(activity) {
+  activity_->instance = this;
+  // TODO(Triang3l): Register activity callbacks.
+}
+
+bool AndroidWindowedAppContext::InitializeApp(std::unique_ptr<WindowedApp> (
+    *app_creator)(WindowedAppContext& app_context)) {
+  assert_null(app_);
+  app_ = app_creator(this);
+  if (!app_->OnInitialize()) {
+    app_->InvokeOnDestroy();
+    app_.reset();
+    return false;
+  }
+  return true;
+}
+
+}  // namespace ui
+}  // namespace xe