Method unwind

src/jrd/jrd.cpp:4979–5016

void JRequest::unwind(CheckStatusWrapper* user_status, int level)
{
/**************************************
 *
 *	g d s _ $ u n w i n d
 *
 **************************************
 *
 * Functional description
 *	Unwind a running request.  This is potentially nasty since it can
 *	be called asynchronously.
 *
 **************************************/
	try
	{
		EngineContextHolder tdbb(user_status, this, FB_FUNCTION);
		check_database(tdbb);

		Request* request = verify_request_synchronization(getHandle(), level);

		try
		{
			JRD_unwind_request(tdbb, request);
		}
		catch (const Exception& ex)
		{
			transliterateException(tdbb, ex, user_status, "JRequest::unwind");
			return;
		}
	}
	catch (const Exception& ex)
	{
		ex.stuffException(user_status);
		return;
	}

	successful_completion(user_status);
}


SysStableAttachment::SysStableAttachment(Attachment* handle)