- int pack(const void* inbuf, int incount, void* outbuf, int outcount, int* position, MPI_Comm comm);
- int unpack(const void* inbuf, int insize, int* position, void* outbuf, int outcount, MPI_Comm comm);
+ int pack(const void* inbuf, int incount, void* outbuf, int outcount, int* position, const Comm* comm);
+ int unpack(const void* inbuf, int insize, int* position, void* outbuf, int outcount, const Comm* comm);