Function internal_ast

src/jrd/lck.cpp:1184–1219

static void internal_ast(Lock* lock)
{
/**************************************
 *
 *	i n t e r n a l _ a s t
 *
 **************************************
 *
 * Functional description
 *	Deliver blocking asts to all locks identical to
 *	the passed lock.  This routine is called to downgrade
 *	all other locks in the same process which do not have
 *	the lck_compatible field set.
 *	Note that if this field were set, the internal lock manager
 *	should not be able to generate a lock request which blocks
 *	on our own process.
 *
 **************************************/
	fb_assert(LCK_CHECK_LOCK(lock));

	// go through the list, saving the next lock in the list
	// in case the current one gets deleted in the ast

	Lock* next;
	for (Lock* match = hash_get_lock(lock, 0, 0); match; match = next)
	{
		next = match->lck_identical;

		// don't deliver the ast to any locks which are already compatible

		if (match != lock && !compatible(match, lock, lock->lck_logical) && match->lck_ast)
		{
			(*match->lck_ast)(match->lck_object);
		}
	}
}