XBT_PUBLIC(void) MSG_comm_destroy(msg_comm_t comm);
XBT_PUBLIC(MSG_error_t) MSG_comm_wait(msg_comm_t comm, double timeout);
XBT_PUBLIC(void) MSG_comm_waitall(msg_comm_t * comm, int nb_elem,
XBT_PUBLIC(void) MSG_comm_destroy(msg_comm_t comm);
XBT_PUBLIC(MSG_error_t) MSG_comm_wait(msg_comm_t comm, double timeout);
XBT_PUBLIC(void) MSG_comm_waitall(msg_comm_t * comm, int nb_elem,