This is possible, but I find these restrictions to be hard to follow. As soon as you need to call a function, you now need to audit that function to determine t

This is possible, but I find these restrictions to be hard to follow. As soon as you need to call a function, you now need to audit that function to determine that it only calls other async signal safe functions. When you come back to the code to fix a bug six months later, you need to remember these restrictions. Do this when you must, but it is easy to screw up.