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除非加入打印操作，要不然值都是0，这个问题怎么解决，毕竟我现在需要优化性能，必须使用-O2或-O3编译
@段晓辉 烦请大佬过来看看
@arrow 在get_reply != 2那行后面加asm volatile("memb\n\t":::"memory")
asm volatile("memb\n\t":::"memory")
@arrow 抱歉，刚刚试了一下，没用，我再改下代码
@arrow 然后get_reply是不是volatile？
@段晓辉 你好，这个问题勉强算是解决了
