msgpack.dll doesn't export most of the functions

[pi-jas]

I'm trying to create a version of msgpack.dll to include in a LabVIEW VI but there only appear to be 33 functions which are prefaced with the MSGPACK_DLLEXPORT keyword. This is my first time using a DLL, so my understanding may be flawed.

My question is two-fold;

1. Am I doing something wrong?
2. How can I access functions such as msgpack_sbuffer_init, msgpack_packer_init and any of the msgpack_pack_xxx functions without having to modify the msgpack source?

Regards, John

[redboltz]

Hi @pi-jas,

1. Am I doing something wrong?

No, you are doing well.

1. How can I access functions such as msgpack_sbuffer_init, msgpack_packer_init and any of the msgpack_pack_xxx functions without having to modify the msgpack source?

Those functions are defined as inline function. See:
https://github.com/msgpack/msgpack-c/blob/master/include/msgpack/sbuffer.h#L41
https://github.com/msgpack/msgpack-c/blob/master/include/msgpack/pack.h#L131
https://github.com/msgpack/msgpack-c/blob/master/include/msgpack/pack.h#L116

When you include those header files, you can call those functions. That's why, those functions are not exported to DLL.

FYI: When you use MSVC, 'inline' is replaced to '__inline'.
https://github.com/msgpack/msgpack-c/blob/master/include/msgpack/sysdep.h#L192

[pi-jas]

Thanks for the quick reply @redboltz.
It would seem that my problems lie in importing the DLL to LabVIEW. I guess I'll need to manually create the references from within LabVIEW to use the inline functions.

[pi-jas]

Just in case anyone else encounters the same problem. I solve the LabVIEW problem by writing a C wrapper around the static __inline functions to export them.

__declspec(dllexport) void msgpack_sbuffer_init_ext(msgpack_sbuffer\* sbuf) { msgpack_sbuffer_init(sbuf); }

I created a companion header file as well for completeness.