原子加
注意
Not support multiprocessing, because multi process has each signal memory space !
安装：
pip install effi
基本实施
__sync_add_and_fetch();
__sync_sub_and_fetch();
__sync_bool_compare_and_swap();
__sync_val_compare_and_swap();
例子：
from atomicplus import AtomicCounter
a = AtomicCounter(0)
def base_test():
base = AtomicCounter(0)
assert base.value == 0
base += 1
base -= 1
asser
