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std::atomic::fetch_or(3) | C++ Standard Libary | std::atomic::fetch_or(3) |
NAME¶
std::atomic::fetch_or - std::atomic::fetch_or
Synopsis¶
T fetch_or( T arg,
std::memory_order order = (since C++11)
std::memory_order_seq_cst ) noexcept; (member only of atomic<Integral>
T fetch_or( T arg, template specialization)
std::memory_order order =
std::memory_order_seq_cst ) volatile noexcept;
Atomically replaces the current value with the result of bitwise OR of the
value and
arg. The operation is read-modify-write operation. Memory is affected
according to
the value of order.
The volatile-qualified version is deprecated if (since C++20)
std::atomic<T>::is_always_lock_free is false.
Parameters¶
arg - the other argument of bitwise OR
order - memory order constraints to enforce
Return value¶
The value immediately preceding the effects of this function in
the modification
order of *this.
See also¶
atomic_fetch_or replaces the atomic object with the result of
bitwise OR
atomic_fetch_or_explicit with a non-atomic argument and obtains the previous
value
(C++11) of the atomic
(C++11) (function template)
2022.07.31 | http://cppreference.com |