Module guard 

🔬This is a nightly-only experimental API. (thread_local_internals)

This module provides a way to schedule the execution of the destructor list and the runtime cleanup function. Calling enable sets up the current thread to ensure that these functions are called at the right times.

Modules

key 🔒 Experimental

A lot of UNIX platforms don’t have a specialized way to register TLS destructors for native TLS. Instead, we use one TLS key with a destructor that will run all native TLS destructors in the destructor list.