I am expected to create and pass an instance of such class
ApiProxyWrapperReply in my calling program
via a function
void SPAPI_RegisterApiProxyWrapperReply(ApiProxyWrapperReply*
apiProxyWrapperReply);
and the external library will then call the various methods of
ApiProxyWrapperReply as 'call-back' functions when needed.
Considering that the class only has abstract virtual methods and the
destructor is non-virtual you *might* be able to do this by declaring
a raw interface ({$Interfaces Corba}) and declaring all the virtual
methods in the same order (very important!) with suitable signatures
and calling convention (for i386 you should pick cppdecl otherwise the
system default should be alright), implementing that interface in some
Object Pascal class and then passing an instance of that interface to
the library.
It could still go wrong due to some differences in the ABI, but it
might just as well work. 🤷♀️
In C++, I was expected to pass the class instance to the external
library. So, In Pascal, do I pass the interface variable to the external
library?
Thanks a lot.
Dennis Poon
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