I’m also a C++ programmer, I can’t even use half of the C++ stdlib for real time thread work, I certainly can’t use a GC.
My original foray into GCs was making real time ones, and the Fil-C GC is based on that work. I haven’t fully made it real time friendly (the few locks it has aren’t RT-friendly) but if I had more time I could make it give you hard guarantees.
It’s already full concurrent and on the fly, so it won’t pause you