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> 18 // void swap(upgrade_lock<Mutex>& x, upgrade_lock<Mutex>& y); 19 20 #include <boost/thread/lock_types.hpp> 21 #include <boost/detail/lightweight_test.hpp> 22 23 struct shared_mutex 24 { lock_upgradeshared_mutex25 void lock_upgrade() 26 { 27 } unlock_upgradeshared_mutex28 void unlock_upgrade() 29 { 30 } 31 }; 32 33 shared_mutex m; 34 main()35int main() 36 { 37 boost::upgrade_lock<shared_mutex> lk1(m); 38 boost::upgrade_lock<shared_mutex> lk2; 39 swap(lk1, lk2); 40 BOOST_TEST(lk1.mutex() == 0); 41 BOOST_TEST(lk1.owns_lock() == false); 42 BOOST_TEST(lk2.mutex() == &m); 43 BOOST_TEST(lk2.owns_lock() == true); 44 45 return boost::report_errors(); 46 } 47 48