1 files changed, 47 insertions, 0 deletions
diff --git a/zbar/refcnt.c b/zbar/refcnt.c
new file mode 100644
index 0000000..e3a5cd9
--- /dev/null
+++ b/zbar/refcnt.c
@@ -0,0 +1,47 @@
+/*------------------------------------------------------------------------
+ *  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+ *
+ *  This file is part of the ZBar Bar Code Reader.
+ *
+ *  The ZBar Bar Code Reader is free software; you can redistribute it
+ *  and/or modify it under the terms of the GNU Lesser Public License as
+ *  published by the Free Software Foundation; either version 2.1 of
+ *  the License, or (at your option) any later version.
+ *
+ *  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser Public License
+ *  along with the ZBar Bar Code Reader; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ *  Boston, MA  02110-1301  USA
+ *
+ *  http://sourceforge.net/projects/zbar
+ *------------------------------------------------------------------------*/
+
+#include "refcnt.h"
+
+#if !defined(_WIN32) && !defined(TARGET_OS_MAC) && defined(HAVE_LIBPTHREAD)
+
+pthread_once_t initialized = PTHREAD_ONCE_INIT;
+pthread_mutex_t _zbar_reflock;
+
+static void initialize(void)
+{
+    pthread_mutex_init(&_zbar_reflock, NULL);
+}
+
+void _zbar_refcnt_init()
+{
+    pthread_once(&initialized, initialize);
+}
+
+#else
+
+void _zbar_refcnt_init()
+{
+}
+
+#endif