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Apparatus and method for processing events in a digital versatile disc (DVD) system using system threads and separate dormant/awake counter threads and clock driven semaphores

  • US 6,272,625 B1
  • Filed: 10/08/1997
  • Issued: 08/07/2001
  • Est. Priority Date: 10/08/1997
  • Status: Expired due to Term
First Claim
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1. A method of managing a plurality of counters in a digital versatile disc system having a multi-threaded operating system and a playback program with a system program thread, the method comprising:

  • A. creating a single independent counter program thread in the playback program when at least one of the plurality of counters is to be utilized by the system, the counter thread exclusively controlling counters that are placed under its control;

    B. sending commands from the system program thread to the counter program thread specifying each of the plurality of counters, and causing the each counter to be placed under control of the counter program thread;

    C. using the counter thread to periodically increment and decrement all counters under its control independently of the system program thread; and

    D. using the counter program thread at times when the counter program thread is not incrementing and decrementing counters under its control to execute another function on all of the counters under its control independently of the system program thread.

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