Transactional locking with read-write locks in transactional memory systems
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United States of America Patent
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Mar 3, 2015
Grant Date -
Dec 30, 2010
app pub date -
Jun 26, 2009
filing date -
Jun 26, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method for transactional memory using read-write locks is disclosed. Each of a plurality of shared memory areas is associated with a respective read-write lock, which includes a read-lock portion indicating whether any thread has a read-lock for read-only access to the memory area and a write-lock portion indicating whether any thread has a write-lock for write access to the memory area. A thread executing a group of memory access operations as an atomic transaction acquires the proper read or write permissions before performing a memory operation. To perform a read access, the thread attempts to obtain the corresponding read-lock and succeeds if no other thread holds a write-lock for the memory area. To perform a write-access, the thread attempts to obtain the corresponding write-lock and succeeds if no other thread holds a write-lock or read-lock for the memory area.
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