-int zebraLock (int fd, int wr);
-int zebraLockNB (int fd, int wr);
-int zebraUnlock (int fd);
+typedef struct zebra_lock_info *ZebraLockHandle;
+ZebraLockHandle zebra_lock_create(const char *file, int excl_flag);
+void zebra_lock_destroy (ZebraLockHandle h);
+int zebra_lock (ZebraLockHandle h);
+int zebra_lock_nb (ZebraLockHandle h);
+int zebra_unlock (ZebraLockHandle h);
+int zebra_lock_fd (ZebraLockHandle h);