How do you accomplish the waiting operation? If it does not synchronize with the other thread, the compiler will optimize away the load. This isn't too surprisi

How do you accomplish the waiting operation? If it does not synchronize with the other thread, the compiler will optimize away the load. This isn't too surprising once you assume that not every *x in the source code will result in a memory access instruction. I would even say that most C programmers expect such basic optimizations to happen, although they might not always like the consequences.