Shared data management scheme using shared data locks for multi-

Details Shared data management scheme using shared data locks for multi- Shared data management scheme using shared data locks for multi-

1994-09-13

1996-12-31

Black, Thomas G.

395608, 395412, 395478, 395726, 395674, G06F 1200

Patent

active

055903266

ABSTRACT:
A shared data management scheme capable of manipulating the shared data by the multi-threading without requiring the explicit programming of the lock in the program. In this scheme, different shared data identifiers are assigned to different threads, and different locks are set up for different shared data identifiers, so as to enable the detection of an access in violation to the locks among the accesses to the shared data for each thread separately. Preferably, the shared data required in an execution of each thread are mapped to a region exclusively allocated to each thread in a virtual space, in units of pages, a page protection of a memory management unit is set up with respect to each page mapping the shared data, and a lock for the shared data mapped to each page is automatically set up in response to an occurrence of an exception due to the page protection of the memory management unit caused by an access to the shared data mapped to each page from each thread.

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Paul R. Wilson, "Pointer Swizzling at Page Fault Time: Efficiently Supporting Huge Address Spaces on Standard Hardware", Technical Report UIC-EECS-90-6, Dec. 1990, pp. 1-8.

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