内存模型和原子类型操作

1、内存顺序

a、memory_order_relaxed；

b、memory_order_consume；

c、memory_order_acquire；

d、memory_order_release；

e、memory_order_acq_rel；

f、memory_order_seq_cst；这是原子类型上所有操作的内存顺序选项，是最严格的可用选项；顺序一致。

Acquire and Release语意：
Acquire semantics： is a property that can only apply to operations that read from shared memory, whether they are read-modify-write operations or plain loads. The operation is then considered a read-acquire. Acquire semantics prevent memory reordering of the read-acquire with any read or write operation that <