1 /*
2 Copyright 2017 Glen Joseph Fernandes
3 (glenjofe@gmail.com)
4
5 Distributed under the Boost Software License, Version 1.0.
6 (http://www.boost.org/LICENSE_1_0.txt)
7 */
8 #include <boost/config.hpp>
9 #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && \
10 !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
11 #include <boost/core/lightweight_test.hpp>
12 #include <boost/smart_ptr/enable_shared_from_this.hpp>
13 #include <boost/smart_ptr/make_local_shared.hpp>
14
15 template<class T = void>
16 struct creator {
17 typedef T value_type;
18
19 template<class U>
20 struct rebind {
21 typedef creator<U> other;
22 };
23
creatorcreator24 creator() { }
25
26 template<class U>
creatorcreator27 creator(const creator<U>&) { }
28
allocatecreator29 T* allocate(std::size_t size) {
30 return static_cast<T*>(::operator new(sizeof(T) * size));
31 }
32
deallocatecreator33 void deallocate(T* ptr, std::size_t) {
34 ::operator delete(ptr);
35 }
36 };
37
38 template<class T, class U>
39 inline bool
operator ==(const creator<T> &,const creator<U> &)40 operator==(const creator<T>&, const creator<U>&)
41 {
42 return true;
43 }
44
45 template<class T, class U>
46 inline bool
operator !=(const creator<T> &,const creator<U> &)47 operator!=(const creator<T>&, const creator<U>&)
48 {
49 return false;
50 }
51
52 class type
53 : public boost::enable_shared_from_this<type> {
54 public:
55 static unsigned instances;
56
type()57 type() {
58 ++instances;
59 }
60
~type()61 ~type() {
62 --instances;
63 }
64
65 private:
66 type(const type&);
67 type& operator=(const type&);
68 };
69
70 unsigned type::instances = 0;
71
main()72 int main()
73 {
74 BOOST_TEST(type::instances == 0);
75 {
76 boost::local_shared_ptr<type[]> result =
77 boost::allocate_local_shared<type[]>(creator<type>(), 3);
78 try {
79 result[0].shared_from_this();
80 BOOST_ERROR("shared_from_this did not throw");
81 } catch (...) {
82 BOOST_TEST(type::instances == 3);
83 }
84 }
85 BOOST_TEST(type::instances == 0);
86 {
87 boost::local_shared_ptr<type[]> result =
88 boost::allocate_local_shared_noinit<type[]>(creator<>(), 3);
89 try {
90 result[0].shared_from_this();
91 BOOST_ERROR("shared_from_this did not throw");
92 } catch (...) {
93 BOOST_TEST(type::instances == 3);
94 }
95 }
96 return boost::report_errors();
97 }
98 #else
main()99 int main()
100 {
101 return 0;
102 }
103 #endif
104