XBT_PRIVATE void* smpi_get_tmp_sendbuffer(int size);
XBT_PRIVATE void* smpi_get_tmp_recvbuffer(int size);
XBT_PRIVATE void smpi_free_tmp_buffer(void* buf);
XBT_PRIVATE void* smpi_get_tmp_sendbuffer(int size);
XBT_PRIVATE void* smpi_get_tmp_recvbuffer(int size);
XBT_PRIVATE void smpi_free_tmp_buffer(void* buf);