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 // upgrade_lock(mutex_type& m, adopt_lock_t);
20 
21 
22 #include <boost/thread/lock_types.hpp>
23 #include <boost/thread/shared_mutex.hpp>
24 #include <boost/detail/lightweight_test.hpp>
25 
26 
main()27 int main()
28 {
29   boost::shared_mutex m;
30   m.lock_upgrade();
31   boost::upgrade_lock<boost::shared_mutex> lk(m, boost::adopt_lock);
32   BOOST_TEST(lk.mutex() == &m);
33   BOOST_TEST(lk.owns_lock() == true);
34 
35   return boost::report_errors();
36 }
37 
38