> The trick is not to try to be too cute by using OpenMP operations in > one thread and hoping that they will synchronize with weaker C++11 > atomic operations in another thread. It might work on one machine but > not another. I’m still uncertain what's supposed to work and what's not. Assume we have a C++11 atomic variable and a loop that is associated with an OpenMP loop directive. The atomic variable is accessed inside the loop (e.g. compare-and-exchange). Does this work as we would expect, i.e., do the OpenMP threads access the variable atomically? And if so, what's an example that does not work?
