Patents by Inventor Dai C. Middleton

Dai C. Middleton has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Deadlock avoidance
    Patent number: 9411661
    Abstract: 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.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: August 9, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Martin W. J. Cocks, Dai C. Middleton, Colin R. Penfold, Helen M. Witter
  • DEADLOCK AVOIDANCE
    Publication number: 20100262972
    Abstract: 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.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 14, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Martin W. J. Cocks, Dai C. Middleton, Colin R. Penfold, Helen M. Witter