| Re: Can CALL_EXTERNAL be used to access C++? [message #10636] |
Wed, 31 December 1997 00:00 |
rivers
Messages: 228
Registered: March 1991
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Senior Member |
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In article <34AA5473.390C90CD@jhuapl.edu>, Martha Kusterer <Martha.Kusterer@jhuapl.edu> writes:
> Hi,
> Can IDL be used to call C++ routines using CALL_EXTERNAL? I am
> currently trying to decide if I want to use C++ instead of C to code a
> processing system. Some of the I/O routines will be accessed from IDL to
> display the data.
>
> I couldn't find any mention of C++ in the documentation.
Yes it can, but I think you need to make a function with C linkage which is
what IDL will call with CALL_EXTERNAL. That C linkage function should process
the (argc, argv) arguments and call the C++ linkage functions. I am doing this
routinely on both Unix and Windows.
// my_cc_func.cc
int my_cc_func(int *p1, ...)
{
...
}
extern "C"
{
int myfunc(int argc, void *argv[])
{
return my_cc_func(argv[0], ...);
}
}
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CARS (773) 702-9951 (secretary)
Univ. of Chicago (773) 702-5454 (FAX)
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Chicago, IL 60637 rivers@cars.uchicago.edu (e-mail)
or:
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