1 // Copyright (C) 2010 Vicente Botet 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 #include <boost/thread/shared_mutex.hpp> 7 #include <boost/thread/locks.hpp> 8 main()9int main() { 10 11 boost::shared_mutex mtx; boost::upgrade_lock<boost::shared_mutex> lk(mtx); 12 13 boost::upgrade_to_unique_lock<boost::shared_mutex> lk2(lk); 14 15 return 0; 16 } 17