Function mpi::ffi::MPI_Igatherv

pub unsafe extern fn MPI_Igatherv(sendbuf: *const c_void,
                                  sendcount: c_int,
                                  sendtype: MPI_Datatype,
                                  recvbuf: *mut c_void,
                                  recvcounts: *const c_int,
                                  displs: *const c_int,
                                  recvtype: MPI_Datatype,
                                  root: c_int,
                                  comm: MPI_Comm,
                                  request: *mut MPI_Request)
                                  -> c_int