1// Copyright (C) 2005, 2009 Free Software Foundation
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// TR1 2.2.2 Template class shared_ptr [tr.util.smartptr.shared]
19
20#include <tr1/memory>
21#include <testsuite_hooks.h>
22
23struct A { };
24struct B : A { };
25
26// 2.2.3.5 shared_ptr observers [tr.util.smartptr.shared.obs]
27
28// use_count
29int
30test01()
31{
32  bool test __attribute__((unused)) = true;
33
34  const std::tr1::shared_ptr<A> p1;
35  VERIFY( p1.use_count() == 0 );
36  const std::tr1::shared_ptr<A> p2(p1);
37  VERIFY( p1.use_count() == 0 );
38
39  return 0;
40}
41
42int
43test02()
44{
45  bool test __attribute__((unused)) = true;
46
47  std::tr1::shared_ptr<A> p1(new A);
48  std::tr1::shared_ptr<A> p2(p1);
49  p1.reset();
50  VERIFY( p1.use_count() == 0 );
51  VERIFY( p2.use_count() == 1 );
52
53  return 0;
54}
55
56int
57test03()
58{
59  bool test __attribute__((unused)) = true;
60
61  std::tr1::shared_ptr<A> p1(new A);
62  std::tr1::shared_ptr<A> p2(p1);
63  p2.reset(new B);
64  VERIFY( p1.use_count() == 1 );
65  VERIFY( p2.use_count() == 1 );
66
67  return 0;
68}
69
70
71int
72main()
73{
74  test01();
75  test02();
76  test03();
77  return 0;
78}
79