D-Man wrote:
>
> I like to write functions such as function_prime as a macro because they are so
>simple. That way it doesn't take any runtime to call it.
>
> -D
>
I don't think that the macro approach works when specifying a function
as a callback. Does it?? If so, I would love to hear how, because that
would mean something is seriously broken in my understanding of the
pre-processor, compilation and linking process and the callback use of
function pointers.
I would expect that using:
#define function_prime(ARG) function(ARG->arg1,ARG->arg2)
will cause the line:
gtk_timeout_add(interval, function_prime, &data);
to be expanded to:
gtk_timeout_add(interval, function, &data);
and, when called, to have the effect of calling
function( ((type1 *)&data), ((type2 *)rand()) );
Where rand() is not really called of course, but represents some unknown
content of a register or stack location used to pass the second argument
of a function, when the call by pointer expects to be passing one
argument.
Eric
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