std::atomic_ref<T>::load (3) - Linux Manuals
T load( std::memory_order order = std::memory_order_seq_cst ) const noexcept; (since C++20)
Atomically loads and returns the current value of the referenced object. Memory is affected according to the value of order.
order must be one of std::memory_order_relaxed, std::memory_order_consume, std::memory_order_acquire or std::memory_order_seq_cst. Otherwise the behavior is undefined.
order - memory order constraints to enforce
The current value of the referenced object.
operator_T (public member function)