+/** @brief Opaque type representing a barrier identifier
+ * @ingroup msg_synchro
+ * @hideinitializer
+ */
+
+#define MSG_BARRIER_SERIAL_PROCESS -1
+typedef struct s_xbt_bar *msg_bar_t;
+XBT_PUBLIC(msg_bar_t) MSG_barrier_init( unsigned int count);
+XBT_PUBLIC(void) MSG_barrier_destroy(msg_bar_t bar);
+XBT_PUBLIC(int) MSG_barrier_wait(msg_bar_t bar);
+