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https://issues.apache.org/jira/browse/THRIFT-3972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15661521#comment-15661521
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Aki Sukegawa commented on THRIFT-3972:
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I've seen some usages in the past.
It seems that Hive and in turn Impala are using this.
> Remove unused mutex code from the C++ library to reduce the maintenance
> overhead of the project
> -----------------------------------------------------------------------------------------------
>
> Key: THRIFT-3972
> URL: https://issues.apache.org/jira/browse/THRIFT-3972
> Project: Thrift
> Issue Type: Improvement
> Components: C++ - Library
> Affects Versions: 0.10.0
> Reporter: James E. King, III
> Assignee: James E. King, III
> Priority: Minor
>
> As part of looking into THRIFT-3038 a couple of unused classes were
> identified, and it was suggested we use a different ticket to track their
> removal:
> NoStarveReadWriteMutex
> ReadWriteMutex
> RWGuard
> Thrift's mission is to make cross-platform/cross-language RPC easy and not to
> provide a cross-platform concurrency library, so there is no need to keep
> unused concurrency related code in the project.
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