Electrical computers and digital data processing systems: input/ – Access locking
Patent
1998-07-07
2000-08-08
Auve, Glenn A.
Electrical computers and digital data processing systems: input/
Access locking
707 8, G06F 1200
Patent
active
061015695
ABSTRACT:
The present invention is directed to obtaining a correct processing result without an inexpedience such as a starvation by having a plurality of processes gain an access in parallel to a resource such as a VRAM. When one of a plurality of processing means requests an exclusive access to a portion of a resource, a lock range processing part 122 permits an exclusive access only when the process does not result in an inexpedience, for example, when other processing means is not permitted to gain an exclusive access to an overlapped portion. Further, the lock range processing part 122 inhibits permission of an exclusive access to other portion overlapping a portion and permits an exclusive access to such portion when the number of permissions of exclusive accesses to other portion overlapping this portion exceeds a given number while an exclusive access to such portion is not permitted. The lock range processing part 122 thus prevents a starvation from occurring by limiting the number of permissions of an exclusive access to other overlapping portion passing a portion which overlaps the other overlapping portion.
REFERENCES:
patent: 5285528 (1994-02-01), Hart
patent: 5603018 (1997-02-01), Terada et al.
patent: 5761659 (1998-06-01), Bertoni
patent: 5933824 (1999-08-01), DeKoning et al.
patent: 5956712 (1999-09-01), Bennett et al.
Miyamoto Kohtaroh
Okuyama Kenichi
Auve Glenn A.
International Business Machines - Corporation
Lefkowitz Sumati
Sbrollini, Esq. Jay P.
LandOfFree
Computer resources access control apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Computer resources access control apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer resources access control apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1160314