std::atomic_ref<T>:: required_alignment

From cppreference.com
C++
Concurrency support library
Threads
(C++11)
(C++20)
(C++17) (C++17)
this_thread namespace
(C++11)
(C++11)
Cooperative cancellation
Mutual exclusion
Generic lock management
Condition variables
(C++11)
(C++11)
(C++11)
(C++11)
Semaphores
(C++20) (C++20)
Latches and Barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
Safe Reclamation
Hazard Pointers
(C++26)
(C++26)
(C++26)
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)
(C++11)
(C++11)
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_ref
Member functions
(C++26)
Constants
atomic_ref::required_alignment
Specialized member functions
Specialized for integral,
floating-point and pointer types
Specialized for integral and
pointer types only
(C++26)
(C++26)
Specialized for integral types only
static constexpr std:: size_t required_alignment = /*implementation-defined*/ ;
(since C++20)

The value of required_alignment is the required alignment for an object to be referenced by an atomic reference, which is at least alignof ( T ) .

Notes

Hardware could require that an object to be referenced by an atomic_ref<T> have stricter alignment than other T objects, and whether operations on an atomic_ref are lock-free can depend on the alignment of the referenced object.

Retrieved from " https://en.cppreference.com/mwiki/index.php?title=cpp/atomic/atomic_ref/required_alignment&oldid=161441 "