Roberto,
I understand from the documentation that the install() function returns an object of type install_t. However, install_t seems to be defined as void in SWI-Prolog.h. In other words, code like
install_t install() { ppl_initialize(); PL_register_extensions(predicates); }
would seem to miss a return statement, but adding a return statement would be an error. So, what is the purpose of install_t?
Provide whatever is needed to make it visible from the outside world such as DLL-export statements. If I would have to design in again, I would have used an integer return value, so the install function can signal success/failure. For now I'll not make any changes until there is a standard to move toward.
And why there is not something similar for uninstall()? Thanks in advance
Also install_t:
install_t uninstall() { ppl_remove(); /* or whatever; the predicates are removed */ } /* automatically */
Cheers --- Jan