ceph/src/boost/libs/thread/test/sync/mutual_exclusion/locks/upgrade_lock/mod/non_member_swap_pass.cpp

   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 {
  25   void lock_upgrade()
  26   {
  27   }
  28   void unlock_upgrade()
  29   {
  30   }
  31 };
  32
  33 shared_mutex m;
  34
  35 int 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