1// { dg-options "-std=gnu++11" }
2
3// Copyright (C) 2005-2015 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
21
22#include <memory>
23#include <testsuite_hooks.h>
24
25struct A { };
26struct B : A { };
27
28// 20.6.6.2.5 shared_ptr observers [util.smartptr.shared.obs]
29
30// use_count
31void
32test01()
33{
34  bool test __attribute__((unused)) = true;
35
36  const std::shared_ptr<A> p1;
37  VERIFY( p1.use_count() == 0 );
38  const std::shared_ptr<A> p2(p1);
39  VERIFY( p1.use_count() == 0 );
40}
41
42void
43test02()
44{
45  bool test __attribute__((unused)) = true;
46
47  std::shared_ptr<A> p1(new A);
48  std::shared_ptr<A> p2(p1);
49  p1.reset();
50  VERIFY( p1.use_count() == 0 );
51  VERIFY( p2.use_count() == 1 );
52}
53
54void
55test03()
56{
57  bool test __attribute__((unused)) = true;
58
59  std::shared_ptr<A> p1(new A);
60  std::shared_ptr<A> p2(p1);
61  p2.reset(new B);
62  VERIFY( p1.use_count() == 1 );
63  VERIFY( p2.use_count() == 1 );
64}
65
66
67int
68main()
69{
70  test01();
71  test02();
72  test03();
73  return 0;
74}
75