DEADLOCK AVOIDANCE

摘要

A transaction processing system is operated. A first resource is locked as a shared resource by a first task executing on a computing device. The first task attempts to lock a second resource as an exclusive resource. The occurrence of a deadlock is ascertained. A second task that wishes to use the locked first resource is identified. A current position of the first task with respect to the first resource is stored. The lock on the first resource is removed. The second task is prompted to use the first resource. The first task locks the first resource as the shared resource. The first task is repositioned with respect to first resource according to the stored position. The first task locks the second resource as the exclusive resource. The first task is performed.