+XBT_PUBLIC sg_comm_t sg_mailbox_put_init(sg_mailbox_t mailbox, void* payload, long simulated_size_in_bytes);
+XBT_PUBLIC sg_comm_t sg_mailbox_put_async(sg_mailbox_t mailbox, void* payload, long simulated_size_in_bytes);
+XBT_PUBLIC void sg_mailbox_put(sg_mailbox_t mailbox, void* payload, long simulated_size_in_bytes);
+
+XBT_PUBLIC sg_comm_t sg_mailbox_get_async(sg_mailbox_t mailbox, void** data);
+XBT_PUBLIC void* sg_mailbox_get(sg_mailbox_t mailbox);
+