-XBT_PUBLIC(smx_activity_t) SIMIX_comm_get_send_match(smx_mailbox_t mbox, int (*match_fun)(void*, void*), void* data);
-XBT_PUBLIC(int) SIMIX_comm_has_send_match(smx_mailbox_t mbox, int (*match_fun)(void*, void*), void* data);
-XBT_PUBLIC(int) SIMIX_comm_has_recv_match(smx_mailbox_t mbox, int (*match_fun)(void*, void*), void* data);