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 Mutex* release(); 20 21 #include <boost/thread/lock_types.hpp> 22 #include <boost/detail/lightweight_test.hpp> 23 24 struct shared_mutex 25 { 26 static int lock_count; 27 static int unlock_count; lock_upgradeshared_mutex28 void lock_upgrade() 29 { 30 ++lock_count; 31 } unlock_upgradeshared_mutex32 void unlock_upgrade() 33 { 34 ++unlock_count; 35 } 36 }; 37 38 int shared_mutex::lock_count = 0; 39 int shared_mutex::unlock_count = 0; 40 41 shared_mutex m; 42 main()43int main() 44 { 45 boost::upgrade_lock<shared_mutex> lk(m); 46 BOOST_TEST(lk.mutex() == &m); 47 BOOST_TEST(lk.owns_lock() == true); 48 BOOST_TEST(shared_mutex::lock_count == 1); 49 BOOST_TEST(shared_mutex::unlock_count == 0); 50 BOOST_TEST(lk.release() == &m); 51 BOOST_TEST(lk.mutex() == 0); 52 BOOST_TEST(lk.owns_lock() == false); 53 BOOST_TEST(shared_mutex::lock_count == 1); 54 BOOST_TEST(shared_mutex::unlock_count == 0); 55 56 return boost::report_errors(); 57 } 58 59