| 76 | |
| 77 | template<typename T> |
| 78 | class shared_ptr |
| 79 | { |
| 80 | /*! |
| 81 | CONVENTION |
| 82 | - get() == data |
| 83 | - unique() == (shared_node != 0) && (shared_node->ref_count == 1) |
| 84 | - if (shared_node != 0) then |
| 85 | - use_count() == shared_node->ref_count |
| 86 | - get() == a valid pointer |
| 87 | - if (we are supposed to use the deleter) then |
| 88 | - shared_node->del == the deleter to use |
| 89 | - else |
| 90 | - shared_node->del == 0 |
| 91 | - else |
| 92 | - use_count() == 0 |
| 93 | - get() == 0 |
| 94 | |
| 95 | |
| 96 | - if (there are any weak_ptrs that reference this->data) then |
| 97 | - shared_node->weak_node->ref_count == the number of referencing weak_ptrs |
| 98 | - else |
| 99 | - shared_node->weak_node == 0 |
| 100 | !*/ |
| 101 | |
| 102 | template <typename D> |
| 103 | struct deleter_template : public shared_ptr_deleter |
| 104 | { |
| 105 | deleter_template(const D& d_) : d(d_) {} |
| 106 | void del(const void* p) { d((T*)p); } |
| 107 | D d; |
| 108 | |
| 109 | void* get_deleter_void(const std::type_info& t) const |
| 110 | { |
| 111 | if (typeid(D) == t) |
| 112 | return (void*)&d; |
| 113 | else |
| 114 | return 0; |
| 115 | } |
| 116 | }; |
| 117 | |
| 118 | struct default_deleter : public shared_ptr_deleter |
| 119 | { |
| 120 | void del(const void* p) { delete ((T*)p); } |
| 121 | |
| 122 | void* get_deleter_void(const std::type_info&) const |
| 123 | { |
| 124 | return 0; |
| 125 | } |
| 126 | }; |
| 127 | |
| 128 | public: |
| 129 | |
| 130 | typedef T element_type; |
| 131 | |
| 132 | shared_ptr( |
| 133 | ) : data(0), shared_node(0) {} |
| 134 | |
| 135 | template<typename Y> |
no test coverage detected