Function LCK_convert

src/jrd/lck.cpp:319–373

bool LCK_convert(thread_db* tdbb, Lock* lock, USHORT level, SSHORT wait)
{
/**************************************
 *
 *	L C K _ c o n v e r t
 *
 **************************************
 *
 * Functional description
 *	Convert an existing lock to a new level.
 *
 **************************************/
	SET_TDBB(tdbb);
	fb_assert(LCK_CHECK_LOCK(lock));

#ifdef DEBUG_LCK
	LckSync sync(lock, "LCK_convert");
#endif

	Database* dbb = lock->lck_dbb;

	Jrd::Attachment* const old_attachment = lock->getLockAttachment();
	lock->setLockAttachment(tdbb->getAttachment());

	WaitCancelGuard guard(tdbb, lock, wait);
	FbLocalStatus statusVector;

	const bool result = CONVERT(tdbb, &statusVector, lock, level, wait);

	if (!result)
	{
	    lock->setLockAttachment(old_attachment);

		switch (statusVector[1])
		{
		case isc_deadlock:
		case isc_lock_conflict:
		case isc_lock_timeout:
			statusVector.copyTo(tdbb->tdbb_status_vector);
			tdbb->checkCancelState();
			return false;
		case isc_lockmanerr:
			dbb->dbb_flags |= DBB_bugcheck;
			break;
		}

		statusVector.raise();
	}

	if (!lock->lck_compatible)
		lock->lck_physical = lock->lck_logical = level;

	fb_assert(LCK_CHECK_LOCK(lock));
	return true;
}


bool LCK_convert_opt(thread_db* tdbb, Lock* lock, USHORT level)