docs: add countdown latch example to Semaphore
#6105
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Motivation
Some users have requested that
tokio::sync
add a countdown latchsynchronization primitive. This can be implemented using the existing
Semaphore
API, so rather than adding a countdown latch type, we shouldadd documentation examples showing how the
Semaphore
can be used as acountdown latch.
Solution
This branch adds an example to the
tokio::sync::Semaphore
docsdemonstrating its usage as a countdown latch. This example was extracted
from #6087 (comment).
Closes #6087
Motivation
Solution