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    DEVICE AND METHOD FOR CONTROLLING ACCESS TO COMPUTER RESOURCE
    3.
    发明专利
    DEVICE AND METHOD FOR CONTROLLING ACCESS TO COMPUTER RESOURCE 失效

    公开(公告)号：JPH1139209A

    公开(公告)日：1999-02-12

    申请号：JP18102497

    申请日：1997-07-07

    Applicant: IBM

    Inventor： MIYAMOTO KOTARO ,  OKUYAMA KENICHI

    IPC: G06F12/00 ,  G06F9/46 ,  G06T1/20

    Abstract: PROBLEM TO BE SOLVED: To obtain proper processed results without causing such a failure as the starvation, etc., by performing access to a resource, such as the VRAM (video RAM), etc., from a plurality of processes. SOLUTION: When one of a plurality of processing means requests exclusive access to a certain part of a resource, a lock range processing section 122 permits the exclusive access to the processing means only when no failure occurs in the processing, for example, only when no exclusive access to an overlapping part is permitted to another processing means. In addition, the processing section 122 permits the exclusive access to the certain part by inhibiting the permission to the exclusive access to another part when the number of permitting times of exclusive access to other overlapping parts exceeds a fixed value while the exclusive access to the certain part is not permitted. Thus the processing section 122 prevents the occurrence of starvation by limiting the number of permitting times of exclusive access to other overlapping parts by outrunning the certain part.

    METHOD AND EQUIPMENT FOR EMULATION
    4.
    发明专利
    METHOD AND EQUIPMENT FOR EMULATION 失效

    公开(公告)号：JPH06337940A

    公开(公告)日：1994-12-06

    申请号：JP12579293

    申请日：1993-05-27

    Applicant: IBM

    Inventor： ONO MAKOTO ,  MUROHASHI SHIGEO ,  OKUYAMA KENICHI

    IPC: G06F9/455 ,  G06T11/00 ,  G06F15/72

    Abstract: PURPOSE: To efficiently emulate the graphic system of a conventional architecture by the graphic system of a new architecture. CONSTITUTION: The result of interpretation is held for a plotting instruction and plotting data, and after interpretation is performed once, the held interpreted result is taken out as a rule without performing the interpretation again. At the time of interpreting the plotting instruction of a pertinent line first, the instruction and relating plotting data are interpreted (25 and 30) and held as shadow data (32). At the time of executing the plotting instruction of the pertinent line thereafter, the shadow data are retrieved and plotting is executed. When a program is changed, the shadow data of a changed part are discriminated and the shadow data are eliminated.

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