[Base/UI] Android globals initialization + WindowedAppContext parts

src/xenia/base/main_android.cc

@@ -0,0 +1,66 @@
+/**
+ ******************************************************************************
+ * 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/base/main_android.h"
+
+#include <cstddef>
+
+#include "xenia/base/assert.h"
+#include "xenia/base/logging.h"
+#include "xenia/base/memory.h"
+#include "xenia/base/threading.h"
+
+namespace xe {
+
+static size_t android_initializations_ = 0;
+
+static int32_t android_api_level_ = __ANDROID_API__;
+
+void InitializeAndroidAppFromMainThread(int32_t api_level) {
+  if (android_initializations_++) {
+    // Already initialized for another component in the process.
+    return;
+  }
+
+  // Set the API level before everything else if available - may be needed by
+  // subsystem initialization itself.
+  android_api_level_ = api_level;
+
+  // Logging uses threading.
+  xe::threading::AndroidInitialize();
+
+  // Multiple apps can be launched within one process - don't pass the actual
+  // app name.
+  xe::InitializeLogging("xenia");
+
+  xe::memory::AndroidInitialize();
+}
+
+void ShutdownAndroidAppFromMainThread() {
+  assert_not_zero(android_initializations_);
+  if (!android_initializations_) {
+    return;
+  }
+  if (--android_initializations_) {
+    // Other components are still running.
+    return;
+  }
+
+  xe::memory::AndroidShutdown();
+
+  xe::ShutdownLogging();
+
+  xe::threading::AndroidShutdown();
+
+  android_api_level_ = __ANDROID_API__;
+}
+
+int32_t GetAndroidApiLevel() { return android_api_level_; }
+
+}  // namespace xe