Managing a lock to a resource shared among a plurality of processors
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United States of America Patent
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May 31, 2016
Issued Date -
N/A
app pub date -
Oct 12, 2012
filing date -
Oct 12, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are a computer program product, system, and method for managing a lock to a resource shared among a plurality of processors. Slots in a memory implement the lock on the shared resource. The slots correspond to counter values that are consecutively numbered and indicate one of busy and free. A requesting processor fetches a counter value comprising a fetched counter value. A determination is made as to whether the slot corresponding to the fetched counter value indicates free. A processor identifier of the requesting processor is inserted into the slot corresponding to the fetched counter value in response to determining that the slot corresponding to the fetched counter value indicates not free. The requesting processor accesses the shared resource in response to determining that the slot corresponding to the fetched counter value indicates free.
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