Initial revision

1 files changed, 43 insertions, 0 deletions

diff --git a/libmom/copy-ref.c b/libmom/copy-ref.c
new file mode 100644
index 00000000..f0d37954
--- /dev/null
+++ b/libmom/copy-ref.c
@@ -0,0 +1,43 @@
+/* Copy a mom port reference
+   Copyright (C) 1996 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell, p/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"
+
+error_t
+mom_copy_ref (struct mom_port_ref *new, 
+	      struct mom_port_ref *obj)
+{
+  error_t err;
+  
+  new->lock = SPIN_LOCK_INITIALIZER;
+
+  spin_lock (&obj->lock);
+  assert (obj->refcnt);
+  err = mach_port_mod_refs (mach_task_self (), 
+			    obj->port, MACH_PORT_RIGHT_SEND, 1);
+  new->port = obj->port;
+  spin_unlock (&obj->lock);
+
+  if (err)
+    return err;
+  
+  new->refcnt = 1;
+  return 0;
+}