task = NULL;
res_irecv = MSG_task_irecv(&(task), mailbox);
res_wait = MSG_comm_wait(res_irecv, -1);
task = NULL;
res_irecv = MSG_task_irecv(&(task), mailbox);
res_wait = MSG_comm_wait(res_irecv, -1);
MSG_task_execute(task_com);
XBT_INFO("\"%s\" done", MSG_task_get_name(task_com));
err = MSG_task_destroy(task_com);
MSG_task_execute(task_com);
XBT_INFO("\"%s\" done", MSG_task_get_name(task_com));
err = MSG_task_destroy(task_com);