blob: 17d6caaa4a3b23a35548c997764067998f7ca19c (
plain)
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
|
#ifndef FUNDAMENTAL_LIB_SMART_POINTER_H
#define FUNDAMENTAL_LIB_SMART_POINTER_H
#include "common.h"
#include "type-traits.h"
#include <assert.h>
namespace Slang
{
// TODO: Need to centralize these typedefs
typedef uintptr_t UInt;
typedef intptr_t Int;
// Base class for all reference-counted objects
class RefObject
{
private:
UInt referenceCount;
public:
RefObject()
: referenceCount(0)
{}
RefObject(const RefObject &)
: referenceCount(0)
{}
virtual ~RefObject()
{}
void addReference()
{
referenceCount++;
}
void releaseReference()
{
SLANG_ASSERT(referenceCount != 0);
if(--referenceCount == 0)
{
delete this;
}
}
bool isUniquelyReferenced()
{
SLANG_ASSERT(referenceCount != 0);
return referenceCount == 1;
}
UInt debugGetReferenceCount()
{
return referenceCount;
}
};
inline void addReference(RefObject* obj)
{
if(obj) obj->addReference();
}
inline void releaseReference(RefObject* obj)
{
if(obj) obj->releaseReference();
}
// "Smart" pointer to a reference-counted object
template<typename T>
struct RefPtr
{
RefPtr()
: pointer(0)
{}
RefPtr(T* p)
: pointer(p)
{
addReference(p);
}
RefPtr(RefPtr<T> const& p)
: pointer(p.pointer)
{
addReference(p.pointer);
}
RefPtr(RefPtr<T>&& p)
: pointer(p.pointer)
{
p.pointer = 0;
}
template <typename U>
RefPtr(RefPtr<U> const& p,
typename EnableIf<IsConvertible<T*, U*>::Value, void>::type * = 0)
: pointer((U*) p)
{
addReference((U*) p);
}
#if 0
void operator=(T* p)
{
T* old = pointer;
addReference(p);
pointer = p;
releaseReference(old);
}
#endif
void operator=(RefPtr<T> const& p)
{
T* old = pointer;
addReference(p.pointer);
pointer = p.pointer;
releaseReference(old);
}
void operator=(RefPtr<T>&& p)
{
T* old = pointer;
pointer = p.pointer;
p.pointer = old;
}
template <typename U>
typename EnableIf<IsConvertible<T*, U*>::value, void>::type
operator=(RefPtr<U> const& p)
{
T* old = pointer;
addReference(p.pointer);
pointer = p.pointer;
releaseReference(old);
}
int GetHashCode()
{
return (int)(long long)(void*)pointer;
}
bool operator==(const T * ptr) const
{
return pointer == ptr;
}
bool operator!=(const T * ptr) const
{
return pointer != ptr;
}
bool operator==(RefPtr<T> const& ptr) const
{
return pointer == ptr.pointer;
}
bool operator!=(RefPtr<T> const& ptr) const
{
return pointer != ptr.pointer;
}
template<typename U>
RefPtr<U> As() const
{
RefPtr<U> result(dynamic_cast<U*>(pointer));
return result;
}
~RefPtr()
{
releaseReference((Slang::RefObject*) pointer);
}
T& operator*() const
{
return *pointer;
}
T* operator->() const
{
return pointer;
}
T * Ptr() const
{
return pointer;
}
operator T*() const
{
return pointer;
}
private:
T* pointer;
};
}
#endif
|
