1 files changed, 40 insertions, 0 deletions
diff --git a/libdiskfs/node-nref.c b/libdiskfs/node-nref.c
new file mode 100644
index 00000000..753de65f
--- /dev/null
+++ b/libdiskfs/node-nref.c
@@ -0,0 +1,40 @@
+/* 
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   Written by Thomas Bushnell, BSG.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include "priv.h"
+
+/* Add a hard reference to a node.  If there were no hard
+   references previously, then the node cannot be locked
+   (because you must hold a hard reference to hold the lock). */
+void
+diskfs_nref (struct node *np)
+{
+  int new_hardref;
+  spin_lock (&diskfs_node_refcnt_lock);
+  np->references++;
+  new_hardref = (np->references == 1);
+  spin_unlock (&diskfs_node_refcnt_lock);
+  if (new_hardref)
+    {
+      mutex_lock (&np->lock);
+      diskfs_new_hardrefs (np);
+      mutex_unlock (&np->lock);
+    }
+}