It seems that on_shmem_exit() first argument is a function that
needs to be called back. The function itself doesn't have a
prototype, but it's called with and int and Datum as argument
when it's used.
It seems that almost none of the functions it calls will actually
need any argument, I could only found 3 that actually use it.
Those most weird one was DummyProcKill, which itself doesn't take
any arguments, but it asked to be called with proctype as
argument.
Should I convert them all to take the 2 arguments instead, or
just leave it as is?
Kurt