1 files changed, 46 insertions, 0 deletions
diff --git a/libs/pbd/pbd/base_ui.h b/libs/pbd/pbd/base_ui.h
new file mode 100644
index 0000000000..b4570f8707
--- /dev/null
+++ b/libs/pbd/pbd/base_ui.h
@@ -0,0 +1,46 @@
+#ifndef __pbd_base_ui_h__
+#define __pbd_base_ui_h__
+
+#include <string>
+#include <stdint.h>
+
+#include <sigc++/slot.h>
+#include <sigc++/trackable.h>
+
+class BaseUI : virtual public sigc::trackable {
+  public:
+	BaseUI (std::string name, bool with_signal_pipes);
+	virtual ~BaseUI();
+
+	BaseUI* base_instance() { return base_ui_instance; }
+
+	std::string name() const { return _name; }
+
+	bool ok() const { return _ok; }
+
+	enum RequestType {
+		range_guarantee = ~0
+	};
+
+	struct BaseRequestObject {
+	    RequestType type;
+	    sigc::slot<void> the_slot;
+	};
+
+	static RequestType new_request_type();
+	static RequestType CallSlot;
+
+  protected:
+	int signal_pipe[2];
+	bool _ok; 
+
+  private:
+	std::string _name; 
+	BaseUI* base_ui_instance;
+
+	static uint32_t rt_bit;
+
+	int setup_signal_pipe ();
+};
+
+#endif /* __pbd_base_ui_h__ */