Mutual Exclusion# [mutex] The library provides a set of mutual exclusion primitives to simplify writing race-free code. A mutex object facilitates protection against data races and provides safe synchronization of data between threads. Mutex Classes# mutex rw_mutex spin_mutex spin_rw_mutex speculative_spin_mutex speculative_spin_rw_mutex queuing_mutex queuing_rw_mutex null_mutex null_rw_mutex