@monster yep; I digged also into the m$docs a bit. here is a overview (see the concurrency part): [https://msdn.microsoft.com/en-us/library/hh567368.aspx](https://msdn.microsoft.com/en-us/library/hh567368.aspx)
If you like to compile with cpp "just" include <atomics.h>: [https://docs.microsoft.com/de-de/cpp/standard-library/atomic](https://docs.microsoft.com/de-de/cpp/standard-library/atomic) but I dont´t tried it up to now. For me, the following properitary m$ solution works (x64, windows10, vs2017 community edition) [https://github.com/nim-lang/Nim/issues/6760](https://github.com/nim-lang/Nim/issues/6760)
