XBT_PUBLIC(msg_comm_t) MSG_task_isend(m_task_t task, const char *alias);
XBT_PUBLIC(msg_comm_t) MSG_task_irecv(m_task_t * task, const char *alias);
XBT_PUBLIC(int) MSG_comm_test(msg_comm_t comm);
-void MSG_comm_destroy(msg_comm_t comm);
+XBT_PUBLIC(void) MSG_comm_destroy(msg_comm_t comm);
XBT_PUBLIC(MSG_error_t) MSG_comm_wait(msg_comm_t comm,double timeout);