Function limbo_transaction

src/jrd/tra.cpp:2408–2443

static int limbo_transaction(thread_db* tdbb, TraNumber id)
{
/**************************************
 *
 *	l i m b o _ t r a n s a c t i o n
 *
 **************************************
 *
 * Functional description
 *
 *	limbo_state is called when reconnecting
 *	to an existing transaction to assure that
 *	the transaction is actually in limbo.
 *	It returns the transaction state.
 *
 **************************************/
	SET_TDBB(tdbb);
	Database* dbb = tdbb->getDatabase();
	CHECK_DBB(dbb);

	const ULONG trans_per_tip = dbb->dbb_page_manager.transPerTIP;

	const ULONG page = id / trans_per_tip;
	const ULONG number = id % trans_per_tip;

	WIN window(DB_PAGE_SPACE, -1);
	const tx_inv_page* tip = fetch_inventory_page(tdbb, &window, page, LCK_write);

	const ULONG trans_offset = TRANS_OFFSET(number);
	const UCHAR* byte = tip->tip_transactions + trans_offset;
	const USHORT shift = TRANS_SHIFT(number);
	const int state = (*byte >> shift) & TRA_MASK;
	CCH_RELEASE(tdbb, &window);

	return state;
}


void jrd_tra::unlinkFromAttachment()