XBT_PUBLIC void sg_comm_wait_all(sg_comm_t* comms, size_t count);
XBT_PUBLIC int sg_comm_wait_any_for(sg_comm_t* comms, size_t count, double timeout);
XBT_PUBLIC int sg_comm_wait_any(sg_comm_t* comms, size_t count);
+XBT_PUBLIC void sg_comm_unref(sg_comm_t comm);
SG_END_DECL