--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef CEPH_COMMON_STATIC_ASSERT
+#define CEPH_COMMON_STATIC_ASSERT
+
+/* Create a compiler error if condition is false.
+ * Also produce a result of value 0 and type size_t.
+ * This expression can be used anywhere, even in structure initializers.
+ */
+#define STATIC_ASSERT(x) (sizeof(int[((x)==0) ? -1 : 0]))
+
+#endif