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std::mutex:: mutex

From cppreference.net
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std::mutex
constexpr mutex ( ) noexcept ;
(1) (since C++11)
mutex ( const mutex & ) = delete ;
(2) (since C++11)
1) Constructs the mutex. The mutex is in unlocked state after the constructor completes.
2) Copy constructor is deleted.

Parameters

(none)

Notes

Because the default constructor is constexpr , static mutexes are initialized as part of static non-local initialization , before any dynamic non-local initialization begins. This makes it safe to lock a mutex in a constructor of any static object.

See also

C documentation for mtx_init