Force order of execution of C statements?

Question

I have a problem with the MS C compiler reordering certain statements, critical in a multithreading context, at high levels of optimization. I want to know how to force ord

Answer 1

See _ReadWriteBarrier. That's a compiler intrinsic dedicated to what you are looking for. Be sure to check the documentation against your precise version od MSVC ("deprecated" on VS2012...). Beware cpu reordering (then see MemoryBarrier

The documentation states that the _ReadBarrier, _WriteBarrier, and _ReadWriteBarrier compiler intrinsics (compiler reordering) and that the MemoryBarrier macro (CPU reordering) are all "deprecated" starting with VS2012. But i think they will continue to work fine for some time...

New code may use the new C++11 facilities (links in the MSDN page)