function
<atomic>

std::atomic_fetch_and_explicit

template (integral) (1)
template <class T>
T atomic_fetch_and_explicit (volatile atomic<T>* obj,
                             T val, memory_order sync) noexcept;
template <class T>
T atomic_fetch_and_explicit (atomic<T>* obj,
                             T val, memory_order sync) noexcept;
overloads (2)
T atomic_fetch_and_explicit (volatile A* obj, T val, memory_order sync) noexcept;
T atomic_fetch_and_explicit (A* obj, T val, memory_order sync) noexcept;
Apply bitwise AND to contained value (explicit memory order)
Reads the value contained in obj and replaces it by the result of performing a bitwise AND operation between the read value and val.

The entire operation is atomic (an atomic read-modify-write operation): the value is not affected by other threads between the instant its value is read (to be returned) and the moment it is modified by this function.

The function synchronizes using the memory order specified by argument sync.

See atomic::fetch_and for the equivalent member function of atomic.

Parameters

obj
Pointer to an atomic object that contains an integral value.
Type A represents other overloaded atomic types (in case the library does not implement the C-style atomic types as instantiations of atomic).
val
Value to apply.
T is the integral type of the value contained by the atomic object (atomic's template parameter).
sync
Synchronization mode for the operation.
This shall be one of the values of the enum type memory_order.

Return value

The contained value before the call.
T is the integral type of the value contained by the atomic object (atomic's template parameter).

Data races

No data races (atomic operation). The operation uses sequential consistency (memory_order_seq_cst).

Exception safety

No-throw guarantee: never throws exceptions.

See also