Patents by Inventor Steven R. Vegdahl

Steven R. Vegdahl 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).

  • Method for reducing memory allocations and data copying operations during program calling sequences
    Patent number: 4951194
    Abstract: Segments of memory are allocated to a stack cache as needed to accommodate additional continuation frames during execution of a program. When a continuation is captured, flags in all segments of the stack cache are set to indicate the signals are shared by a captured continuation, the top segment of the stack cache is copied, and the copy is made the top continuation frame of the stack cache. To invoke a continuation, the top segment of the invoked continuation is copied into the current stack cache segment. When the stack cache is ready to underflow into a segment shared by a captured continuation, the shared segment is copied and the stack cache underflows into the copy.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: August 21, 1990
    Assignee: Tektronix, Inc.
    Inventors: Alan C. Bradley, Steven R. Vegdahl, Norman I. Adams