std::atomic_init (3) Linux Manual Page

std::atomic_init – std::atomic_init

Synopsis

Defined in header<atomic>

    template <class T>

    void atomic_init(std::atomic<T> *obj, (since C++ 11)

                                              typename std::atomic<T>::value_type desired) noexcept;

template <class T>

void atomic_init(volatile std::atomic<T> *obj, (since C++ 11)

                                                   typename std::atomic<T>::value_type desired) noexcept;

Initializes the default-constructed atomic object obj with the value desired. The function is not atomic: concurrent access from another thread, even through an atomic operation, is a data race.
If obj was not default-constructed, the behavior is undefined.
If this function is called twice on the same obj, the behavior is undefined.

Parameters

obj – pointer to an atomic object to initialize
desired – the value to initialize atomic object with

Return value

(none)

Notes

This function is provided for compatibility with C. If the compatibility is not required, std::atomic may be initialized through their non-default constructors.

Example

 This section is incomplete
 Reason: no example
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior
P0558R1 C++11 exact type match required because T is deduced from multiple arguments T is deduced from the atomic argument only

See also

ATOMIC_VAR_INIT constant initialization of an atomic variable of static storage duration
                (function macro)
(C++11)
                constructs an atomic object
constructor (public member function of std::atomic<T>)