1 //
2 // ip_hash_test.cpp
3 //
4 // Copyright 2011 Peter Dimov
5 //
6 // Distributed under the Boost Software License, Version 1.0.
7 // See accompanying file LICENSE_1_0.txt or copy at
8 // http://www.boost.org/LICENSE_1_0.txt
9 //
10
11 #include <boost/intrusive_ptr.hpp>
12 #include <boost/functional/hash.hpp>
13 #include <boost/detail/lightweight_test.hpp>
14
15 class base
16 {
17 private:
18
19 int use_count_;
20
21 base(base const &);
22 base & operator=(base const &);
23
24 protected:
25
base()26 base(): use_count_(0)
27 {
28 }
29
~base()30 virtual ~base()
31 {
32 }
33
34 public:
35
use_count() const36 long use_count() const
37 {
38 return use_count_;
39 }
40
intrusive_ptr_add_ref(base * p)41 inline friend void intrusive_ptr_add_ref(base * p)
42 {
43 ++p->use_count_;
44 }
45
intrusive_ptr_release(base * p)46 inline friend void intrusive_ptr_release(base * p)
47 {
48 if(--p->use_count_ == 0) delete p;
49 }
50 };
51
52 struct X: public base
53 {
54 };
55
main()56 int main()
57 {
58 boost::hash< boost::intrusive_ptr<X> > hasher;
59
60 boost::intrusive_ptr<X> p1, p2( p1 ), p3( new X ), p4( p3 ), p5( new X );
61
62 BOOST_TEST_EQ( p1, p2 );
63 BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
64
65 BOOST_TEST_NE( p1, p3 );
66 BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
67
68 BOOST_TEST_EQ( p3, p4 );
69 BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
70
71 BOOST_TEST_NE( p3, p5 );
72 BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
73
74 return boost::report_errors();
75 }
76