Retrieves the cached item in mutable mode. What this means is that the internal Spin Lock
is set to write. Therefore, this macro will block until all read requests are satisfied. Any further read
requests will be blocked until you finish making use of the item. Avoid using this macro often unless
the cache usage is limited to safe interfaces. You are essentially bypassing the no globals ethos and
thus these APIs should be used with care!!!!!!
First, let’s make sure we have tokio initialized at least once. The runtime created here
will be saved to the global context so the next call to this macro will simply grab a
reference to the previously initialized runtime.
Macro for starting the server. When a server is created, it does not start accepting clients
right away. You need to call this macro to do that or call [tcp::RUMServerHandle::start]
directly.