1200911 is referenced by 64 patents.
ABSTRACT OF THE DISCLOSURE Disclosed herein is a system for automaticallyreleasing a dead lock state in a data processing system,wherein a plurality of kinds of tasks selectively use aplurality of common resources. When one task X occupies aresource A and, in this state, the task is to occupy a resource B, if the resource B is occupied by another task Y, the task Xis placed in a waiting state. When the task X, is placed in awaiting state based on the occupation of the resource B by thetask Y and the task Y, which is to occupy the resource A, isplaced in a waiting state based on the occupation of theresource A by the task X, the task X and the task Y are placedin a dead lock state. When the dead lock state is causedbetween the tasks X and Y, the occupation of the resource A bythe task X is released and the processing of the task Y iscarried out, and next, the processing of the task X is carriedout.