improve rphort management for usbd

src/class/cdc/cdc_rndis_host.c

@@ -35,6 +35,16 @@
 #include "cdc_host.h"
 #include "cdc_rndis_host.h"
 
+#if 0  // TODO remove subtask related macros later
+// Sub Task
+#define OSAL_SUBTASK_BEGIN
+#define OSAL_SUBTASK_END                    return TUSB_ERROR_NONE;
+
+#define STASK_RETURN(_error)                return _error;
+#define STASK_INVOKE(_subtask, _status)     (_status) = _subtask
+#define STASK_ASSERT(_cond)                 TU_VERIFY(_cond, TUSB_ERROR_OSAL_TASK_FAILED)
+#endif
+
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF
 //--------------------------------------------------------------------+