Method startTransaction

src/remote/client/interface.cpp:7431–7479

ITransaction* Attachment::startTransaction(CheckStatusWrapper* status, unsigned int tpbLength,
	const unsigned char* tpb)
{
/**************************************
 *
 *	g d s _ t r a n s a c t i o n
 *
 **************************************
 *
 * Functional description
 *	Start a transaction.
 *
 **************************************/
	try
	{
		reset(status);

		CHECK_HANDLE(rdb, isc_bad_db_handle);
		rem_port* port = rdb->rdb_port;
		RefMutexGuard portGuard(*port->port_sync, FB_FUNCTION);

		if (/***tpbLength < 0 ||***/ (tpbLength > 0 && !tpb))
		{
			status_exception::raise(Arg::Gds(isc_bad_tpb_form));
		}

		// Validate data length

		CHECK_LENGTH(port, tpbLength);

		PACKET* packet = &rdb->rdb_packet;
		packet->p_operation = op_transaction;
		P_STTR* trans = &packet->p_sttr;
		trans->p_sttr_database = rdb->rdb_id;
		trans->p_sttr_tpb.cstr_length = tpbLength;
		trans->p_sttr_tpb.cstr_address = tpb;

		send_and_receive(status, rdb, packet);

		ITransaction* t = FB_NEW Transaction(make_transaction(rdb, packet->p_resp.p_resp_object), this);
		t->addRef();
		return t;
	}
	catch (const Exception& ex)
	{
		ex.stuffException(status);
	}
	return NULL;
}


void Attachment::transactRequest(CheckStatusWrapper* status, ITransaction* apiTra,