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Posted to issues@arrow.apache.org by "Weston Pace (Jira)" <ji...@apache.org> on 2022/04/13 04:22:00 UTC

[jira] [Created] (ARROW-16178) [C++] Add a ThreadLocalState concept built on thread local

Weston Pace created ARROW-16178:
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             Summary: [C++] Add a ThreadLocalState concept built on thread local
                 Key: ARROW-16178
                 URL: https://issues.apache.org/jira/browse/ARROW-16178
             Project: Apache Arrow
          Issue Type: Sub-task
          Components: C++
            Reporter: Weston Pace


The ThreadLocalState is tied to an executor and, on creation, creates a state for every thread in the executor.  In order to quickly access a particular thread's state we need a way  to get a thread index (the index of the thread in the executor).  Historically we used ThreadIndexer and this JIRA introduces a new approach using thread local.

Similar to the ThreadIndexer this thread local state concept will fail when the capacity is resized during a run.

Similar to the ThreadIndexer this concept won't work too well for serial execution until ARROW-15732 is resolved.



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