SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
// notify the user callback if any
if (msg_global->task_copy_callback) {
msg_task_t task = (msg_task_t) buff;
SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
// notify the user callback if any
if (msg_global->task_copy_callback) {
msg_task_t task = (msg_task_t) buff;