score: Add rtems_chain_node_count_unprotected()

1 files changed, 34 insertions, 0 deletions

diff --git a/cpukit/score/src/chainnodecount.c b/cpukit/score/src/chainnodecount.c
new file mode 100644
index 0000000000..3b54d93468
--- /dev/null
+++ b/cpukit/score/src/chainnodecount.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/score/chain.h>
+
+size_t _Chain_Node_count_unprotected( const Chain_Control *chain )
+{
+  size_t            count = 0;
+  const Chain_Node *tail  = _Chain_Immutable_tail( chain );
+  const Chain_Node *node  = _Chain_Immutable_first( chain );
+
+  while ( node != tail ) {
+    ++count;
+
+    node = _Chain_Immutable_next( node );
+  }
+
+  return count;
+}