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 shared_lock;
18 
19 // void swap(shared_lock& u);
20 
21 #include <boost/thread/lock_types.hpp>
22 #include <boost/detail/lightweight_test.hpp>
23 
24 struct shared_mutex
25 {
lock_sharedshared_mutex26   void lock_shared()
27   {
28   }
unlock_sharedshared_mutex29   void unlock_shared()
30   {
31   }
32 };
33 
34 shared_mutex m;
35 
main()36 int main()
37 {
38   boost::shared_lock<shared_mutex> lk1(m);
39   boost::shared_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