1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#ifndef SHARED_PTR_H
#define SHARED_PTR_H
#include <algorithm>
#undef SOLVED_1
#define SOLVED_1
namespace Ti
{
template <typename T>
class shared_ptr
{
private:
T* m_ptr;
unsigned long* m_count;
public:
shared_ptr()
: m_ptr(NULL), m_count(NULL)
{}
T* get() const
{
return m_ptr;
}
shared_ptr(const shared_ptr<T>& other)
: m_ptr(other.m_ptr), m_count(other.m_count)
{
add_ref();
}
template <typename O>
shared_ptr(const shared_ptr<O>& other)
: m_ptr(other.m_ptr), m_count(other.m_count)
{
add_ref();
}
/* used to construct shared_ptr with a sub-object of O */
template <typename O>
shared_ptr(const shared_ptr<O>& other, T* ptr)
: m_ptr(ptr), m_count(other.m_count)
{
add_ref();
}
template <typename O>
explicit shared_ptr(O* p)
: m_ptr(p), m_count(new unsigned long(1))
{}
shared_ptr& operator=(const shared_ptr<T>& other)
{
if (*this == other)
return *this;
release();
m_ptr = other.m_ptr;
m_count = other.m_count;
add_ref();
return *this;
}
template <typename O>
shared_ptr& operator=(const shared_ptr<O>& other)
{
if (*this == other)
return *this;
release();
m_ptr = other.m_ptr;
m_count = other.m_count;
add_ref();
return *this;
}
~shared_ptr()
{
release();
}
T& operator*() const
{
return *m_ptr;
}
T* operator->() const
{
return m_ptr;
}
void swap(shared_ptr<T>& other)
{
std::swap(m_ptr, other.m_ptr);
std::swap(m_count, other.m_count);
}
inline void reset()
{
shared_ptr().swap(*this);
}
private:
void add_ref()
{
if (m_count != NULL)
++(*m_count);
}
void release()
{
if (m_ptr != NULL)
{
--(*m_count);
if (*m_count == 0)
{
delete m_ptr;
delete m_count;
}
}
}
template<class O> friend class shared_ptr;
template <typename R, typename... Args>
friend shared_ptr<R> make_shared(Args...);
template<typename U1, typename U2>
friend bool operator==(const shared_ptr<U1>& a, const shared_ptr<U2>& b);
template<typename U1, typename U2>
friend bool operator==(const shared_ptr<U1>& a, const U2* b);
template<typename U1, typename U2>
friend bool operator==(const U1* a, const shared_ptr<U2>& b);
template<typename U1, typename U2>
friend bool operator!=(const shared_ptr<U1>& a, const U2* b);
template<typename U1, typename U2>
friend bool operator!=(const U1* a, const shared_ptr<U2>& b);
template<typename U1, typename U2>
friend bool operator!=(const shared_ptr<U1>& a, const shared_ptr<U2>& b);
template <typename R, typename F>
friend shared_ptr<R> shared_dynamic_cast(const shared_ptr<F>& from);
};
template <typename T, typename ... Args>
shared_ptr<T> make_shared(Args ... args)
{
return shared_ptr<T>(new T(args ...));
}
template<typename U1, typename U2>
bool operator==(const shared_ptr<U1>& a, const shared_ptr<U2>& b)
{
return a.get() == b.get();
}
template<typename U1, typename U2>
bool operator==(const shared_ptr<U1>& a, const U2* b)
{
return a.get() == b.get();
}
template<typename U1, typename U2>
bool operator==(const U1* a, const shared_ptr<U2>& b)
{
return a.get() == b.get();
}
template<typename U1, typename U2>
bool operator!=(const shared_ptr<U1>& a, const U2* b)
{
return a.get() != b.get();
}
template<typename U1, typename U2>
bool operator!=(const U1* a, const shared_ptr<U2>& b)
{
return a.get() != b.get();
}
template<typename U1, typename U2>
bool operator!=(const shared_ptr<U1>& a, const shared_ptr<U2>& b)
{
return a.get() != b.get();
}
template <typename T, typename F>
shared_ptr<T> shared_dynamic_cast(const shared_ptr<F>& from)
{
T* castptr = dynamic_cast<T *>(from.get());
if (castptr != NULL)
return shared_ptr<T>(from, castptr);
else
return shared_ptr<T>();
}
} // end namespace ti
namespace std
{
using namespace Ti;
template <typename T>
inline void swap(shared_ptr<T>& t1, shared_ptr<T>& t2)
{
t1.swap(t2);
}
}
#endif
/* vim: set et sw=2 ts=2: */
|
