Static Function Invocation Thru Pointer

[Paul Svensson]

henry at zoo.toronto.edu (Henry Spencer) writes:
>In article <1991Mar3.002250.26164 at agate.berkeley.edu> labc-1ia at web-3g.berkeley.edu (Andrew M. Choi) writes:
>>Hi.  This article is about the question of invoking a static
>>function in another file through the use of pointer to
>>function...
>
>That is perfectly legitimate.  If you can get a pointer to it, you can
>call it.  "static" just means that the *name* is not visible outside the
>file where it is defined.

I had some fun(?) with this when (de)porting Hack to bsd 2.9...

Henry is right, of course, but you shouldn't trust all C implementators to
know this.  CC on the pdp/11 did this wrong in one case; whe using overlays,
functions declared static did not get a "thunk" in the base overlay, and when
a pointer to a static function was passed off to someone in another overlay,
using it there had interesting results :-)

			/Paul
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