| 1 | /* |
|---|---|
| 2 | Copyright 2012-2015 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/core/lightweight_test.hpp> |
| 9 | #include <boost/smart_ptr/enable_shared_from_this.hpp> |
| 10 | #include <boost/smart_ptr/make_shared.hpp> |
| 11 | |
| 12 | template<class T = void> |
| 13 | struct creator { |
| 14 | typedef T value_type; |
| 15 | |
| 16 | template<class U> |
| 17 | struct rebind { |
| 18 | typedef creator<U> other; |
| 19 | }; |
| 20 | |
| 21 | creator() { } |
| 22 | |
| 23 | template<class U> |
| 24 | creator(const creator<U>&) { } |
| 25 | |
| 26 | T* allocate(std::size_t size) { |
| 27 | return static_cast<T*>(::operator new(sizeof(T) * size)); |
| 28 | } |
| 29 | |
| 30 | void deallocate(T* ptr, std::size_t) { |
| 31 | ::operator delete(ptr); |
| 32 | } |
| 33 | }; |
| 34 | |
| 35 | template<class T, class U> |
| 36 | inline bool |
| 37 | operator==(const creator<T>&, const creator<U>&) |
| 38 | { |
| 39 | return true; |
| 40 | } |
| 41 | |
| 42 | template<class T, class U> |
| 43 | inline bool |
| 44 | operator!=(const creator<T>&, const creator<U>&) |
| 45 | { |
| 46 | return false; |
| 47 | } |
| 48 | |
| 49 | class type |
| 50 | : public boost::enable_shared_from_this<type> { |
| 51 | public: |
| 52 | static unsigned instances; |
| 53 | |
| 54 | type() { |
| 55 | ++instances; |
| 56 | } |
| 57 | |
| 58 | ~type() { |
| 59 | --instances; |
| 60 | } |
| 61 | |
| 62 | private: |
| 63 | type(const type&); |
| 64 | type& operator=(const type&); |
| 65 | }; |
| 66 | |
| 67 | unsigned type::instances = 0; |
| 68 | |
| 69 | int main() |
| 70 | { |
| 71 | BOOST_TEST(type::instances == 0); |
| 72 | { |
| 73 | boost::shared_ptr<type[]> result = |
| 74 | boost::allocate_shared<type[]>(allocator: creator<type>(), count: 3); |
| 75 | try { |
| 76 | result[0].shared_from_this(); |
| 77 | BOOST_ERROR("shared_from_this did not throw"); |
| 78 | } catch (...) { |
| 79 | BOOST_TEST(type::instances == 3); |
| 80 | } |
| 81 | } |
| 82 | BOOST_TEST(type::instances == 0); |
| 83 | { |
| 84 | boost::shared_ptr<type[]> result = |
| 85 | boost::allocate_shared_noinit<type[]>(allocator: creator<>(), count: 3); |
| 86 | try { |
| 87 | result[0].shared_from_this(); |
| 88 | BOOST_ERROR("shared_from_this did not throw"); |
| 89 | } catch (...) { |
| 90 | BOOST_TEST(type::instances == 3); |
| 91 | } |
| 92 | } |
| 93 | return boost::report_errors(); |
| 94 | } |
| 95 |