1 // Copyright (C) 2018 Tom Hughes 2 // 3 // Distributed under the Boost Software License, Version 1.0. (See accompanying 4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5 6 // <boost/thread/lock_guard.hpp> 7 8 // template <class Mutex> class lock_guard; 9 10 // lock_guard(Mutex& m_) 11 12 #include <boost/thread/lock_guard.hpp> 13 #include <boost/thread/mutex.hpp> 14 #include <boost/detail/lightweight_test.hpp> 15 16 boost::mutex m; 17 fail()18void fail() 19 { 20 boost::lock_guard<boost::mutex> lk0(m); 21 boost::lock_guard<boost::mutex> lk1(m); 22 } 23