NAME

std::atomic_ref::exchange - std::atomic_ref::exchange

Synopsis

T exchange( T desired, std::memory_order order = (since C++20)
std::memory_order_seq_cst ) const noexcept;

Atomically replaces the value of the referenced object with desired. The operation
is a read-modify-write operation. Memory is affected according to the value of
order.

Parameters

desired - value to assign
order - memory order constraints to enforce

Return value

The value of the referenced object before the call.