Re: cbdata

On Thu, 12 Jul 2001, Henrik Nordstrom wrote:

> In an attempt to address this cbdataReferenceDone() was introduced,
> allowing code like
>
> fooDone(...)
> {
> void *cbdata;
> ...
> if ((cbdata = cbdataReferenceDone(mystate->calllback_data)) != NULL)
> mystate->callback(..., cbdata);
> }
>
>
> which tries to join the best of both approaches.

Right. And in C++, you can write an even more consise and efficient
code:

fooDone(...)
{
        ...
        if (void *cbdata = cbdataAbandon(mystate->calllback_data))
                mystate->callback(..., cbdata);
}

Given the above, GCC may eliminate cbdata variable from existance and
there is no danger in using cbdata after it is passed on to a
callback. :)

Alex.
Received on Thu Jul 12 2001 - 11:29:26 MDT