Patents by Inventor Zhitai Sun

Zhitai Sun 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).

  • Executing a general-purpose operating system as a task under the control of a real-time operating system
    Patent number: 8555285
    Abstract: A task control computer program includes computer executable instructions which when executed by a computer, cause the computer to execute an operating system as a task. The computer is caused to perform determining whether there is an executable non-idle process under control of the operating system and changing a set priority of the operating system task to a priority higher than the primary priority of the operating system task when it is determined that there is an executable non-idle process with the specified time elapsed.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: October 8, 2013
    Assignee: Fujitsu Limited
    Inventors: Zhitai Sun, Kenichi Hasegawa, Takeharu Kato, Toru Uchiyama
  • Method of and apparatus for managing task, and computer product
    Patent number: 7707576
    Abstract: A task management method includes determining, when a task other than an operating system task operated cooperatively with a process executed under a control of an operating system requests a cooperative operation to the operating system task and is set in a wait state, whether a priority of the task is higher than a priority of other task set in a wait state by requesting a cooperative operation to the operating system task, and making, when the priority of the task is determined to be higher than the priority of the other task, the operating system task and a process under control of the operating system operated cooperatively with the task succeed the priority of the task.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: April 27, 2010
    Assignee: Fujitsu Limited
    Inventor: Zhitai Sun
  • Method of and apparatus for managing task, and computer product
    Publication number: 20050183085
    Abstract: A task management method includes determining, when a task other than an operating system task operated cooperatively with a process executed under a control of an operating system requests a cooperative operation to the operating system task and is set in a wait state, whether a priority of the task is higher than a priority of other task set in a wait state by requesting a cooperative operation to the operating system task, and making, when the priority of the task is determined to be higher than the priority of the other task, the operating system task and a process under control of the operating system operated cooperatively with the task succeed the priority of the task.
    Type: Application
    Filed: May 24, 2004
    Publication date: August 18, 2005
    Inventor: Zhitai Sun
  • Method of and apparatus for task control, and computer product
    Publication number: 20050050541
    Abstract: A task control computer program includes computer executable instructions which when executed by a computer, cause the computer to execute an operating system as a task. The computer is caused to perform determining whether there is an executable non-idle process under control of the operating system and changing a set priority of the operating system task to a priority higher than the primary priority of the operating system task when it is determined that there is an executable non-idle process with the specified time elapsed.
    Type: Application
    Filed: February 25, 2004
    Publication date: March 3, 2005
    Applicant: Fujitsu Limited
    Inventors: Zhitai Sun, Kenichi Hasegawa, Takeharu Kato, Toru Uchiyama