Change Details

The code used a weird combination of c-style function points with c++ templates. Using `FunctionRef` allows writing the same code much simpler. I also removed the `thread_id` argument because it was never used.

The code used a weird combination of c-style function points with c++ templates. Using `FunctionRef` allows writing the same code much simpler. I also removed the `thread_id` argument because it was never used. No functional or performance changes are expected.

The code used a weird combination of c-style function points with c++ templates. Using `FunctionRef` allows writing the same code much simpler. I also removed the `thread_id` argument because it was never used. No functional or performance changes are expected.