(since C++11) (member only of atomic<Integral> template specialization) | ||
T fetch_or( T arg, std::memory_order order = std::memory_order_seq_cst ) noexcept; | ||
T fetch_or( T arg, 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) |
arg | - | the other argument of bitwise OR |
order | - | memory order constraints to enforce |
The value immediately preceding the effects of this function in the modification order of *this
.
(C++11)(C++11) | replaces the atomic object with the result of bitwise OR with a non-atomic argument and obtains the previous value of the atomic (function template) |
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