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Transactional memory is often advocated as an easier-to-use replacement or locks that avoids any possibility of deadlock. Recently, as more care has been exercised in precisely specifying its semantics, a number of researchers have observed that probably the most attractive semantics for transactional memory systems is based on "Single global lock atomicity", i.e. on the semantics of a single global lock. The paper argues that this should be taken one step further: The synchronization operations seen by the programmer should really just be locks, possibly with some syntactic sugar for easier programming with a single global lock. Use as a deadlock-free lock replacement does not require any rollback primitive, or any other constructs that expose properties of the implementation.

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Format:PDFSize:132 KB
Date:Feb 2009
Pages:7

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