1 // Copyright Kohei Takahashi 2016. 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 6 #include <boost/config.hpp> 7 8 #ifdef BOOST_NO_CXX11_HDR_MUTEX 9 #error "C++11 <mutex> is not available." 10 #endif 11