Function compatible

src/jrd/lck.cpp:895–929

static bool compatible(const Lock* lock1, const Lock* lock2, USHORT level2)
{
/**************************************
 *
 *	c o m p a t i b l e
 *
 **************************************
 *
 * Functional description
 *	Given two locks, and a desired level for the
 *	second lock, determine whether the two locks
 *	would be compatible.
 *
 **************************************/

	fb_assert(LCK_CHECK_LOCK(lock1));
	fb_assert(LCK_CHECK_LOCK(lock2));

	// if the locks have the same compatibility block,
	// they are always compatible regardless of level

	if (lock1->lck_compatible && lock2->lck_compatible && lock1->lck_compatible == lock2->lck_compatible)
	{
		// check for a second level of compatibility as well:
		// if a second level was specified, the locks must also be compatible at the second level

		if (!lock1->lck_compatible2 || !lock2->lck_compatible2 ||
			lock1->lck_compatible2 == lock2->lck_compatible2)
		{
			return true;
		}
	}

	return compatibility[lock1->lck_logical][level2];
}


static void enqueue(thread_db* tdbb, CheckStatusWrapper* statusVector, Lock* lock, USHORT level, SSHORT wait)