int SIMIX_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host);
smx_action_t SIMIX_rdv_get_head(smx_rdv_t rdv);
XBT_INLINE void SIMIX_comm_start(smx_action_t action);
int SIMIX_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host);
smx_action_t SIMIX_rdv_get_head(smx_rdv_t rdv);
XBT_INLINE void SIMIX_comm_start(smx_action_t action);