Namespaces
Variants

std::atomic<T>:: operator T

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C++
Concurrency support library
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(C++11)
(C++20)
(C++17) (C++17)
this_thread namespace
(C++11)
(C++11)
Cooperative cancellation
Mutual exclusion
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(C++11)
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Safe reclamation
Hazard pointers
(C++26)
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Atomic types
(C++11)
(C++20)
(C++11)
Initialization of atomic types
(C++11) (deprecated in C++20)
(C++11) (deprecated in C++20)
(C++11)
Memory ordering
(C++11)
(C++11) (deprecated in C++26)
(C++11)
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Free functions for atomic operations
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11) (C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++26) (C++26)
(C++26) (C++26)
(C++11)
(C++20) (C++20)
(C++20)
(C++20)
Free functions for atomic flags
(C++11) (C++11)
(C++11) (C++11)
(C++20) (C++20)
(C++20) (C++20)
(C++20)
(C++20)
std::atomic
Member functions
atomic::operator T
(C++20)
(C++20)
(C++20)
Constants
(C++17)
Specialized member functions
Specialized for integral,
floating-point (C++20)
and pointer types
Specialized for integral and
pointer types only
(C++26)
(C++26)
Specialized for integral types only
operator T ( ) const noexcept ;
(1) (since C++11)
operator T ( ) const volatile noexcept ;
(2) (since C++11)

Atomically loads and returns the current value of the atomic variable. Equivalent to load ( ) .

It is deprecated if std:: atomic < T > :: is_always_lock_free is false and overload (2) participates in overload resolution.

(since C++20)

Parameters

(none)

Return value

The current value of the atomic variable.

See also

atomically obtains the value of the atomic object
(public member function)