Function mpi::ffi::MPI_Alltoallv

pub unsafe extern fn MPI_Alltoallv(sendbuf: *const c_void,
                                   sendcounts: *const c_int,
                                   sdispls: *const c_int,
                                   sendtype: MPI_Datatype,
                                   recvbuf: *mut c_void,
                                   recvcounts: *const c_int,
                                   rdispls: *const c_int,
                                   recvtype: MPI_Datatype,
                                   comm: MPI_Comm)
                                   -> c_int