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
|
// Common/MyBuffer2.h
#ifndef ZIP7_INC_COMMON_MY_BUFFER2_H
#define ZIP7_INC_COMMON_MY_BUFFER2_H
#include "../../C/Alloc.h"
#include "MyTypes.h"
class CMidBuffer
{
Byte *_data;
size_t _size;
Z7_CLASS_NO_COPY(CMidBuffer)
public:
CMidBuffer(): _data(NULL), _size(0) {}
~CMidBuffer() { ::MidFree(_data); }
void Free() { ::MidFree(_data); _data = NULL; _size = 0; }
bool IsAllocated() const { return _data != NULL; }
operator Byte *() { return _data; }
operator const Byte *() const { return _data; }
size_t Size() const { return _size; }
void Alloc(size_t size)
{
if (!_data || size != _size)
{
::MidFree(_data);
_size = 0;
_data = NULL;
_data = (Byte *)::MidAlloc(size);
if (_data)
_size = size;
}
}
void AllocAtLeast(size_t size)
{
if (!_data || size > _size)
{
::MidFree(_data);
const size_t kMinSize = (size_t)1 << 16;
if (size < kMinSize)
size = kMinSize;
_size = 0;
_data = NULL;
_data = (Byte *)::MidAlloc(size);
if (_data)
_size = size;
}
}
};
class CAlignedBuffer1
{
Byte *_data;
Z7_CLASS_NO_COPY(CAlignedBuffer1)
public:
~CAlignedBuffer1()
{
z7_AlignedFree(_data);
}
CAlignedBuffer1(size_t size)
{
_data = NULL;
_data = (Byte *)z7_AlignedAlloc(size);
if (!_data)
throw 1;
}
operator Byte *() { return _data; }
operator const Byte *() const { return _data; }
};
class CAlignedBuffer
{
Byte *_data;
size_t _size;
Z7_CLASS_NO_COPY(CAlignedBuffer)
public:
CAlignedBuffer(): _data(NULL), _size(0) {}
~CAlignedBuffer()
{
z7_AlignedFree(_data);
}
/*
CAlignedBuffer(size_t size): _size(0)
{
_data = NULL;
_data = (Byte *)z7_AlignedAlloc(size);
if (!_data)
throw 1;
_size = size;
}
*/
void Free()
{
z7_AlignedFree(_data);
_data = NULL;
_size = 0;
}
bool IsAllocated() const { return _data != NULL; }
operator Byte *() { return _data; }
operator const Byte *() const { return _data; }
size_t Size() const { return _size; }
void Alloc(size_t size)
{
if (!_data || size != _size)
{
z7_AlignedFree(_data);
_size = 0;
_data = NULL;
_data = (Byte *)z7_AlignedAlloc(size);
if (_data)
_size = size;
}
}
void AllocAtLeast(size_t size)
{
if (!_data || size > _size)
{
z7_AlignedFree(_data);
_size = 0;
_data = NULL;
_data = (Byte *)z7_AlignedAlloc(size);
if (_data)
_size = size;
}
}
// (size <= size_max)
void AllocAtLeast_max(size_t size, size_t size_max)
{
if (!_data || size > _size)
{
z7_AlignedFree(_data);
_size = 0;
_data = NULL;
if (size_max < size) size_max = size; // optional check
const size_t delta = size / 2;
size += delta;
if (size < delta || size > size_max)
size = size_max;
_data = (Byte *)z7_AlignedAlloc(size);
if (_data)
_size = size;
}
}
};
/*
CMidAlignedBuffer must return aligned pointer.
- in Windows it uses CMidBuffer(): MidAlloc() : VirtualAlloc()
VirtualAlloc(): Memory allocated is automatically initialized to zero.
MidAlloc(0) returns NULL
- in non-Windows systems it uses g_AlignedAlloc.
g_AlignedAlloc::Alloc(size = 0) can return non NULL.
*/
typedef
#ifdef _WIN32
CMidBuffer
#else
CAlignedBuffer
#endif
CMidAlignedBuffer;
#endif
|
