syncache

https://github.com/angdraug/syncache

SynCache stores cached objects in a Hash that is protected by an advanced two-level locking mechanism which ensures that: * Multiple threads can add and fetch objects in parallel. * While one thread is working on a cache entry, other threads can access the rest of the cache with no waiting on the global lock, no race conditions nor deadlock or livelock situations. * While one thread is performing a long and resource-intensive operation, other threads that request the same data will be put on hold, and as soon as the first thread completes the operation, the result will be returned to all threads.