<mutex>

• Mutex types are lockable types used to protect access to a critical section of code: locking a mutex prevents other threads from locking it (exclusive access) until it is unlocked: mutex, recursive_mutex, timed_mutex, recursive_timed_mutex.
  
• Locks are objects that manage a mutex by associating its access to their own lifetime: lock_guard, unique_lock.
• Functions to lock mutiple mutexes simultaneously (try_lock, lock) and to directly prevent concurrent execution of a specific function (call_once).
  

Classes

Mutexes

mutex

Mutex class (class)

recursive_mutex

Recursive mutex class (class)

timed_mutex

Timed mutex class (class)

recursive_timed_mutex

Recursive timed mutex (class)

Locks

lock_guard

Lock guard (class template)

unique_lock

Unique lock (class template)

Other types

once_flag

Flag argument type for call_once (class)

adopt_lock_t

Type of adopt_lock (class)

defer_lock_t

Type of defer_lock (class)

try_to_lock_t

Type of try_to_lock (class)

Functions

try_lock

Try to lock multiple mutexes (function template)

lock

Lock multiple mutexes (function template)

call_once

Call function once (public member function)