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Computer resources access control apparatus and method

  • US 6,101,569 A
  • Filed: 07/07/1998
  • Issued: 08/08/2000
  • Est. Priority Date: 07/07/1997
  • Status: Expired due to Term
First Claim
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1. A computer resource access control apparatus which, when one of a plurality of processing means requests an access to a plurality of portions comprising divisions of the computer resource which are divided such that at least a part of areas may overlap each other while inhibiting an access by other processing means (exclusive access), permits or inhibits said exclusive access to said portions, comprising;

  • exclusive access permission control means, operative when said processing means requests an exclusive access to said portion while an exclusive access to other one or more of said portions having an area overlapping said portion to which said processing means requested an exclusive access is not permitted, for permitting said processing means requesting the exclusive access to gain an exclusive access to said portion,a plurality of counting means provided in correspondence to each of said portions for counting the number of said exclusive accesses permitted to said other one or more portions having an area overlapping the corresponding one of said portions for each period in which said exclusive access to corresponding one of said portions is requested while said exclusive access to the corresponding one of said portions is not permitted, andaccess inhibiting control means for inhibiting permission of an exclusive access to said other one or more portions having an area overlapping said portion corresponding to said counting means when the count of said counting means reaches a predetermined value.

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