为什么这里会出现字节序问题？

Question

我读了关于这个主题的指针别名规则,以及一个答案给出了下面的例子,其中提到一个潜在的问题与字节序,我想知道,如果有人可以给我什么样的字节顺序问题是在下面的代码？

struct Msg
{
   unsigned int a;
   unsigned int b;
};

int main()
{
   // Pass data to something; if the implementer of this API were
   // strict-aliasing-aware, he would have taken a char*, not a unsigned int*
   Msg* msg = new Msg();
   msg->a = 1;
   msg->b = 2;

   // stupidBuffer is an alias for msg.
   // yes I know there are endianess problems here (WHY??), but my API is stupid and 
   // only works for one platform
   unsigned int* stupidBuffer = reinterpret_cast<unsigned int*>(msg);

   SendToStupidApi( stupidBuffer );   
}

Answer 1

没有任何字节序问题.只要StupidApi不涉及通过网络发送或平台之间的序列化,那么根本就没有字节序问题.