John Muehlhausen created ARROW-6840:
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Summary: [C++/Python] retrieve fd of open memory mapped file and
Open() memory mapped file by fd
Key: ARROW-6840
URL: https://issues.apache.org/jira/browse/ARROW-6840
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: John Muehlhausen
We want to retrieve the file descriptor of a memory mapped file for the purpose
of transferring it across process boundaries. On the receiving end, we want to
be able to map a file based on the file descriptor rather than the path.
This helps with race conditions when the path may have been unlinked.
cf
[https://lists.apache.org/thread.html/83373ab00f552ee8afd2bac2b2721468b3f28fe283490e379998453a@%3Cdev.arrow.apache.org%3E]
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