blob: 9b1bc2c01287e6876775a5e507f5d3297a7ed760 (
plain) (
blame)
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
|
/*-----------------------------------------------------------------------------
| Copyright (c) 2013-2017, Nucleic Development Team.
|
| Distributed under the terms of the Modified BSD License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
#pragma once
namespace kiwi
{
class SharedData
{
public:
SharedData() : m_refcount(0) {}
SharedData(const SharedData &other) : m_refcount(0) {}
int m_refcount;
private:
SharedData &operator=(const SharedData &other);
};
template <typename T>
class SharedDataPtr
{
public:
typedef T Type;
SharedDataPtr() : m_data(0) {}
explicit SharedDataPtr(T *data) : m_data(data)
{
incref(m_data);
}
~SharedDataPtr()
{
decref(m_data);
}
T *data()
{
return m_data;
}
const T *data() const
{
return m_data;
}
operator T *()
{
return m_data;
}
operator const T *() const
{
return m_data;
}
T *operator->()
{
return m_data;
}
const T *operator->() const
{
return m_data;
}
T &operator*()
{
return *m_data;
}
const T &operator*() const
{
return *m_data;
}
bool operator!() const
{
return !m_data;
}
bool operator<(const SharedDataPtr<T> &other) const
{
return m_data < other.m_data;
}
bool operator==(const SharedDataPtr<T> &other) const
{
return m_data == other.m_data;
}
bool operator!=(const SharedDataPtr<T> &other) const
{
return m_data != other.m_data;
}
SharedDataPtr(const SharedDataPtr<T> &other) : m_data(other.m_data)
{
incref(m_data);
}
SharedDataPtr<T> &operator=(const SharedDataPtr<T> &other)
{
if (m_data != other.m_data)
{
T *temp = m_data;
m_data = other.m_data;
incref(m_data);
decref(temp);
}
return *this;
}
SharedDataPtr<T> &operator=(T *other)
{
if (m_data != other)
{
T *temp = m_data;
m_data = other;
incref(m_data);
decref(temp);
}
return *this;
}
private:
static void incref(T *data)
{
if (data)
++data->m_refcount;
}
static void decref(T *data)
{
if (data && --data->m_refcount == 0)
delete data;
}
T *m_data;
};
} // namespace kiwi
|
