大致上就是有个Safe Bitfields in C++的玩法在gcc-11里面可能会出幺蛾子
https://preshing.com/20150324/safe-bitfields-in-cpp/



            assert(oldStatus.readers == 0);
            newStatus = oldStatus;
            newStatus.writers--;
            waitToRead = oldStatus.waitToRead;
            if (waitToRead > 0)
            {
                newStatus.waitToRead = 0;
                newStatus.readers = waitToRead;
            }

gcc-11下
if waitToRead>0 then newStatus.writers will not be changed.



【 在 kirbyzhou 的大作中提到: 】
: 有个gcc-11的issue
: union + bit-filed + BitFieldMember包装类 相关
: 大家写代码的时候注意下
: ...................
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