Copy constructor for classes with atomic member

Question

I have a class with an atomic member and i want to write a copy constructor:

struct Foo
{
    std::atomic mInt;

    Foo() {}
    Foo(const Foo&am         


        

Answer 1

No, if you don't know how it will be used, you should use memory_order_seq_cst to be safe. If you use memory_order_relaxed, you could run into issues with instructions being reordered.