Abstract: A method includes retrieving, by a processor, a first entry from a global wait list as a current waiting lock. The method further includes decreasing, by the processor, a deadlock timer of the current waiting lock. The method further includes determining, by the processor, whether the deadlock timer equals zero. The method further includes appending, by the processor, the current waiting lock to an end of a deadlock victim selection list, if the deadlock timer equals zero. The method further includes selecting, by the processor, a victim from the deadlock victim selection list.

Abstract: A method includes retrieving, by a processor, a first entry from a global wait list as a current waiting lock. The method further includes decreasing, by the processor, a deadlock timer of the current waiting lock. The method further includes determining, by the processor, whether the deadlock timer equals zero. The method further includes appending, by the processor, the current waiting lock to an end of a deadlock victim selection list, if the deadlock timer equals zero. The method further includes selecting, by the processor, a victim from the deadlock victim selection list.

Abstract: Various approaches for capturing context data in a data processing arrangement are described. In one approach, a method controls shared access to an object for a plurality of requestors. An access control routine receives an access control request from a first routine of one of the requestors. The access control request specifies a type of control over access to the object and specifies a role descriptor that describes a processing context in the first routine of the requested access control to the object. The context is not visible to the access control routine without the role descriptor. The method determines whether the type of control can or cannot be immediately granted to the requestor. If the type of control cannot be immediately granted to the one of the requestors, the specified type of requested control and role descriptor are stored by the access control routine.