Patent
1997-12-23
1999-06-01
Coleman, Eric
39580032, 3951831, G06F 900
Patent
active
059095741
ABSTRACT:
A computing system in which permanent state changes to portions of the system are effected using transactions, including an exception handier and a method of handling exceptions in such a system is disclosed. Specifically, the computing system comprises a processor for executing at least one process; and scratchpad memory. A transactional subsystem is interconnected with the processor and has a plurality of states. State changes to the transactional subsystem are made irreversible only upon successful completion of a transaction. Program memory interconnected with the processor contains an exception handler for handling an exception dependent on one of a transaction. The handler adapts the processor to buffer data resulting from the exception in the scratchpad memory; and upon successful completion of the transaction, transfer the buffered data to an exception buffer accessible by a software process executing on the processor. Upon unsuccessful completion of the transaction, the buffered data in the scratchpad memory is discarded. Preferably, the transactional subsystem is a shared memory system.
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patent: 5537575 (1996-07-01), Foley et al.
patent: 5655100 (1997-08-01), Ebrahim et al.
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Coleman Eric
Monestime Mackly
Northern Telecom Limited
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