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agent, ntf server: add lookupOrInsertIO, use it for locks and stats - #20
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evgeny-simplex wants to merge 12 commits into
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evgeny-simplex wants to merge 12 commits into
evgeny-simplex wants to merge 12 commits into
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TMap
lookupOrInsertIO: looks the key up without a transaction; if absent, looks it up again and inserts in one transaction. ReturnsRightfor a found value,Leftfor an inserted one.Agent
withLockMap/withLocksMap): an existing lock is found without a transaction and then taken; a new lock is inserted already taken. A thread waiting for a lock no longer re-runs its transaction on every insert into the lock map.createLockis removed (unused).Ntf server
incServerStatuseslookupOrInsertIOinstead of its own double lookup.