> These concepts are rather well talked about .. over the internet and
> usenet, however, I cant find any clear explanation.

> avcall, callback, trampoline, vacall, etc

> I looked in a book of C programming, ie k&r and also the rationale for
> C, an old copy and could not find any explanation.

> I know that javascript books talk a lot about callbacks and there is
> the style of programming involving writing callbacks and registering
> them. Unfortunately, in the age when I took my C class, there was no
> discussion along these lines.

> Can anyone give clear definition, example, benefits, variations,
> origin or citation to a paper where it originated and explained first,
> as well as some modern text that does the better than most job of
> illustrating it and its applications.