struct {
e_smx_comm_type_t type; /* Type of the communication (SIMIX_COMM_SEND or SIMIX_COMM_RECEIVE) */
smx_rdv_t rdv; /* Rendez-vous where the comm is queued */
+
+#ifdef HAVE_MC
+ smx_rdv_t rdv_cpy; /* Copy of the rendez-vous where the comm is queued, MC needs it for DPOR
+ (comm.rdv set to NULL when the communication is removed from the mailbox
+ (used as garbage collector)) */
+#endif
int refcount; /* Number of processes involved in the cond */
int detached; /* If detached or not */