Marcel Märtens d37ca02913 using Locks a more sensitive way.
- replace RwLock by Mutex if it's only accessed for insert/delete
 - use RwLock<HashMap<Mutex>> pattern otherwise in order to allow concurrent `.read()`
 - fixed a deadlock O.o
2020-08-23 21:43:17 +02:00
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2020-08-23 21:43:17 +02:00