updated folder scanning code

src/client_backend/app_ctrl.cpp

@@ -1,7 +1,32 @@
 #ifndef APP_CTRL_CPP
 #define APP_CTRL_CPP
 #include "app_ctrl.h"
+bool app_stop_ = false;
+bool can_run_thread_ = true;
+bool can_scan_folder_ = true;
 int app_stop() {
-	return 0;
+	return app_stop_;
+}
+int can_run_thread() {
+	return can_run_thread_;
+}
+int thread_init() {
+	can_run_thread_ = false;
+	return can_run_thread_;
+}
+int thread_shutdown() {
+	can_run_thread_ = true;
+	return can_run_thread_;
+}
+int can_scan_folder() {
+	return can_scan_folder_;
+}
+int scan_folder_init() {
+	can_scan_folder_ = false;
+	return can_scan_folder_;
+}
+int scan_folder_shutdown() {
+	can_scan_folder_ = true;
+	return can_scan_folder_;
 }
 #endif