I've used it a while ago, but got burned by very uneven support across compilers — MSVC required special tweaks, and old GCC would create crashy code without wa

I've used it a while ago, but got burned by very uneven support across compilers — MSVC required special tweaks, and old GCC would create crashy code without warning. It was okay for basic embarrassingly parallel for loops. I ended up not using any more advanced features, because apart from even worse compiler support, non-trivial multi-threading in C without any safeguards is just too easy to mess up.