If I understand you and the standard correctly, no: the default behavior is `memory_order_seq_cst` "On weakly-ordered systems (ARM, Itanium, PowerPC), special C

If I understand you and the standard correctly, no: the default behavior is `memory_order_seq_cst` "On weakly-ordered systems (ARM, Itanium, PowerPC), special CPU load or memory fence instructions have to be used." http://en.cppreference.com/w/cpp/atomic/memory_order http://en.cppreference.com/w/cpp/atomic/memory_order I'm not 100% sure what you mean by your second paragraph. I think you are saying that repeated writes to a `std::atomic` can be optimized out, which sounds like it is true since `std::atomic` is not `volatile`. https://stackoverflow.com/questions/45960387/why-dont-compilers-merge-redundant-stdatomic-writes https://stackoverflow.com/questions/45960387/why-dont-compil...