Antoine Pitrou created ARROW-17975:
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Summary: [C++] Create after-fork facility
Key: ARROW-17975
URL: https://issues.apache.org/jira/browse/ARROW-17975
Project: Apache Arrow
Issue Type: Wish
Components: C++
Reporter: Antoine Pitrou
Currently, to ensure fork safety when dealing with system resources, we add
hand-baked getpid() tests in relevant APIs.
We could instead have a centralized after-fork facility such as:
{code:c++}
AfterForkToken RegisterAtFork(std::function<void()> after_fork);
{code}
The returned token would have to be kept alive for as long as the after-fork
callbacks are to be registered.
(a more elaborate overload with before-fork, after-fork-in-parent,
after-fork-in-child callbacks could also be added if necessary)
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