A new API for ensuring/releasing thread states

Core Development C API
6

It’d be nice if it was documented that this was the same. I recently spent some time looking at the code trying to work out if it was (and came to the conclusion that it probably was but I wasn’t certain).

In general I’m in favour of something close to PyGILState_Ensure that works with subinterpreters - and specifically the idea that you can nest

state1 = PyGILState_Ensure();
{
    Py_BEGIN_ALLOW_THREADS

    {
        state2 = PyGILState_Ensure();
        PyGILState_Release(state2);
    }
    Py_END_ALLOW_THREADS
}
PyGILState_Release(state1);

and the inner “ensure” will restore the state from the outer one.