NAME¶

std::atomic_store,std::atomic_store_explicit - std::atomic_store,std::atomic_store_explicit

Synopsis¶

Defined in header <atomic>
template< class T >

void atomic_store( std::atomic<T>* obj,

typename std::atomic<T>::value_type desr )
noexcept;
template< class T >

void atomic_store( volatile std::atomic<T>*
obj,

typename std::atomic<T>::value_type desr )
noexcept;
template< class T > (1) (since C++11)

void atomic_store_explicit( std::atomic<T>*
obj,
typename std::atomic<T>::value_type desr,

std::memory_order order) noexcept; (2) (since C++11)
template< class T >

void atomic_store_explicit( volatile
std::atomic<T>* obj,
typename std::atomic<T>::value_type desr,

std::memory_order order) noexcept;

1) Atomically replaces the value pointed to by obj with the value of desr as if by
obj->store(desr)
2) Atomically replaces the value pointed to by obj with the value of desr as if by
obj->store(desr, order)

Parameters¶

obj - pointer to the atomic object to modify
desr - the value to store in the atomic object
the memory synchronization ordering for this operation: only
order - std::memory_order_relaxed, std::memory_order_release and
std::memory_order_seq_cst are permitted.

Return value¶

none.

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 T is deduced from the
deduced from multiple arguments atomic argument only

See also¶

atomically replaces the value of the atomic object with a
store non-atomic argument
(public member function of std::atomic<T>)
atomic_load
atomic_load_explicit atomically obtains the value stored in an atomic object
(C++11) (function template)
(C++11)
memory_order defines memory ordering constraints for the given atomic
(C++11) operation
(enum)

std::atomic_store(std::shared_ptr) specializes atomic operations for
std::atomic_store_explicit(std::shared_ptr) std::shared_ptr
(deprecated in C++20) (function template)