Rough implementation of task poll callbacks #7107
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closing in favor of #7120 |
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_Just throwing this up for initial discussion, I need to do work to clean up internal names & get all the right
tokio_unstablegating.Motivation
We would like to be able to store metadata before polls start and stop to allow us to instrument all polls, not just polls where you have spawned the task.
Solution
Add callbacks for poll start and stop