1 | /* |
2 | Copyright 2019 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_SMART_PTR) && !defined(BOOST_NO_CXX11_ALLOCATOR) |
10 | #include <boost/smart_ptr/allocate_unique.hpp> |
11 | #include <boost/core/lightweight_test.hpp> |
12 | |
13 | struct allow { }; |
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 | |
24 | creator() { } |
25 | |
26 | template<class U> |
27 | creator(const creator<U>&) { } |
28 | |
29 | T* allocate(std::size_t size) { |
30 | return static_cast<T*>(::operator new(sizeof(T) * size)); |
31 | } |
32 | |
33 | void deallocate(T* ptr, std::size_t) { |
34 | ::operator delete(ptr); |
35 | } |
36 | |
37 | template<class U> |
38 | void construct(U* ptr) { |
39 | ::new(static_cast<void*>(ptr)) U(allow()); |
40 | } |
41 | |
42 | template<class U> |
43 | void destroy(U* ptr) { |
44 | ptr->~U(); |
45 | } |
46 | |
47 | }; |
48 | |
49 | template<class T, class U> |
50 | inline bool |
51 | operator==(const creator<T>&, const creator<U>&) |
52 | { |
53 | return true; |
54 | } |
55 | |
56 | template<class T, class U> |
57 | inline bool |
58 | operator!=(const creator<T>&, const creator<U>&) |
59 | { |
60 | return false; |
61 | } |
62 | |
63 | class type { |
64 | public: |
65 | static unsigned instances; |
66 | |
67 | explicit type(allow) { |
68 | ++instances; |
69 | } |
70 | |
71 | ~type() { |
72 | --instances; |
73 | } |
74 | |
75 | private: |
76 | type(const type&); |
77 | type& operator=(const type&); |
78 | }; |
79 | |
80 | unsigned type::instances = 0; |
81 | |
82 | int main() |
83 | { |
84 | { |
85 | std::unique_ptr<type, |
86 | boost::alloc_deleter<type, creator<type> > > result = |
87 | boost::allocate_unique<type>(alloc: creator<type>()); |
88 | BOOST_TEST(result.get() != 0); |
89 | BOOST_TEST(type::instances == 1); |
90 | result.reset(); |
91 | BOOST_TEST(type::instances == 0); |
92 | } |
93 | { |
94 | std::unique_ptr<const type, |
95 | boost::alloc_deleter<const type, creator<> > > result = |
96 | boost::allocate_unique<const type>(alloc: creator<>()); |
97 | BOOST_TEST(result.get() != 0); |
98 | BOOST_TEST(type::instances == 1); |
99 | result.reset(); |
100 | BOOST_TEST(type::instances == 0); |
101 | } |
102 | return boost::report_errors(); |
103 | } |
104 | #else |
105 | int main() |
106 | { |
107 | return 0; |
108 | } |
109 | #endif |
110 | |