Detection of deletion of stored data by concurrently executing p

Details Detection of deletion of stored data by concurrently executing p Detection of deletion of stored data by concurrently executing p

1992-04-29

1993-09-21

Kulik, Paul V.

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395600, 364DIG1, 3642455, 364246, 3642463, 3642466, 3642563, 364265, 3642653, 364243, 3642434, 36424341, G06F 1200, G06F 1300

Patent

active

052476472

ABSTRACT:
A virtual lookaside facility maintains named data objects in class-related data spaces by virtual storage, for use by user programs. Concurrently executing service processes use local copies of an access token to access the data in the data spaces. Deletion of one of the data spaces invalidates the access token so that active processes will encounter a program check on access after data deletion. An error recovery means, recognizing the invalid token as cause of the program check, provides an appropriate return code to the invoker of the service process.

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patent: 4979098 (1990-12-01), Baum et al.
patent: 5008786 (1991-04-01), Thatte
patent: 5023773 (1991-06-01), Baum et al.
Levy, Henry M., "Capability-Based Computer Systems," Chapter 3, pp. 41-62, 1984 Digital Equipment Corporation.

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