Re: passing a C function back to C library
Paolo Bonzini <[email protected]>
| Newsgroups | gmane.comp.lang.smalltalk.gnu.general |
|---|---|
| Message-ID | <[email protected]> |
On 19/02/2017 17:32, Christoph Egger wrote: > Hi! > > [0] discusses how to pass a callback to some C library. Now I would like > to pass a function from some C library to some C library. Is there a > better way to express this than using <cCall ...> to get a smalltalk > function and CCallbackDescriptor to pass it back? You can get the address of a C function with something like CFunctionDescriptor addressOf: 'unlink' If the function is not defined, the returned object will satisfy #isNull: st> (CFunctionDescriptor addressOf: 'unlink') isNull false st> (CFunctionDescriptor addressOf: 'aaa') isNull true Paolo > Christoph > > [0] https://www.gnu.org/software/smalltalk/manual/html_node/Smalltalk-callbacks.html > > > > _______________________________________________ > help-smalltalk mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/help-smalltalk > _______________________________________________ help-smalltalk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-smalltalk
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