< cpp‎ | atomic
Defined in header <atomic>
template< class T >
void atomic_init( std::atomic<T>* obj, T desired );
(since C++11)
template< class T >
void atomic_init( volatile std::atomic<T>* obj, T desired );
(since C++11)

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.


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

Return value



noexcept specification:  


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


See also

constant initialization of an atomic variable of static storage duration
(function macro)
constructs an atomic object
(public member function of std::atomic)
C documentation for atomic_init