1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // Copyright (C) 2011 Vicente J. Botet Escriba 11 // 12 // Distributed under the Boost Software License, Version 1.0. (See accompanying 13 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 14 15 // <boost/thread/locks.hpp> 16 17 // template <class Mutex> class upgrade_lock; 18 19 // void swap(upgrade_lock& u); 20 21 #include <boost/thread/lock_types.hpp> 22 #include <boost/detail/lightweight_test.hpp> 23 24 struct shared_mutex 25 { lock_upgradeshared_mutex26 void lock_upgrade() 27 { 28 } unlock_upgradeshared_mutex29 void unlock_upgrade() 30 { 31 } 32 }; 33 34 shared_mutex m; 35 main()36int main() 37 { 38 boost::upgrade_lock<shared_mutex> lk1(m); 39 boost::upgrade_lock<shared_mutex> lk2; 40 lk1.swap(lk2); 41 BOOST_TEST(lk1.mutex() == 0); 42 BOOST_TEST(lk1.owns_lock() == false); 43 BOOST_TEST(lk2.mutex() == &m); 44 BOOST_TEST(lk2.owns_lock() == true); 45 46 return boost::report_errors(); 47 } 48 49