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+// Copyright 2010 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+// may be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/// \file utils/defs.hpp
+///
+/// Definitions for compiler and system features autodetected at configuration
+/// time.
+
+#if !defined(UTILS_DEFS_HPP)
+#define UTILS_DEFS_HPP
+
+
+/// Attribute to mark a function as non-returning.
+#define UTILS_NORETURN @ATTRIBUTE_NORETURN@
+
+
+/// Attribute to mark a function as pure.
+#define UTILS_PURE @ATTRIBUTE_PURE@
+
+
+/// Attribute to mark an entity as unused.
+#define UTILS_UNUSED @ATTRIBUTE_UNUSED@
+
+
+/// Unconstifies a pointer.
+///
+/// \param type The target type of the conversion.
+/// \param ptr The pointer to be unconstified.
+#define UTILS_UNCONST(type, ptr) ((type*)(unsigned long)(const void*)(ptr))
+
+
+#endif // !defined(UTILS_DEFS_HPP)