blob: af835cf535e810d1393870c86aec390d053b0da6 (
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
|
/*
* Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#ifndef NVBLASTFIXEDBITMAP_H
#define NVBLASTFIXEDBITMAP_H
#include "NvBlastAssert.h"
#include "NvBlastMemory.h"
#include <cstring>
namespace Nv
{
namespace Blast
{
/*!
FixedBitmap is a bitset (bitmap) of fixed side, it's intended to be used with placement new on chunk of memory.
It'll use following memory for data layout. As follows:
// some memory
char *buf = new char[64 * 1024];
const uint32_t bitsCount = 100;
// placement new on this memory
FixedBitmap* arr = new (buf) FixedBitmap(bitsCount);
// you can get max requiredMemorySize by an bitMap to use memory left
buf = buf + FixedBitmap<SomeClass>::requiredMemorySize(bitsCount);
buf:
+------------------------------------------------------------+
| uint32_t | word0 | word1 | word2 | ... |
+------------------------------------------------------------+
*/
class FixedBitmap
{
public:
explicit FixedBitmap(uint32_t bitsCount)
{
m_bitsCount = bitsCount;
}
static uint32_t getWordsCount(uint32_t bitsCount)
{
return (bitsCount + 31) >> 5;
}
static size_t requiredMemorySize(uint32_t bitsCount)
{
return align16(sizeof(FixedBitmap)) + align16(getWordsCount(bitsCount) * sizeof(uint32_t));
}
void clear()
{
memset(data(), 0, getWordsCount(m_bitsCount) * sizeof(uint32_t));
}
void fill()
{
const uint32_t wordCount = getWordsCount(m_bitsCount);
uint32_t* mem = data();
memset(mem, 0xFF, wordCount * sizeof(uint32_t));
const uint32_t bitsRemainder = m_bitsCount & 31;
if (bitsRemainder > 0)
{
mem[wordCount - 1] &= ~(0xFFFFFFFF << bitsRemainder);
}
}
int test(uint32_t index) const
{
NVBLAST_ASSERT(index < m_bitsCount);
return data()[index >> 5] & (1 << (index & 31));
}
void set(uint32_t index)
{
NVBLAST_ASSERT(index < m_bitsCount);
data()[index >> 5] |= 1 << (index & 31);
}
void reset(uint32_t index)
{
NVBLAST_ASSERT(index < m_bitsCount);
data()[index >> 5] &= ~(1 << (index & 31));
}
private:
uint32_t m_bitsCount;
NV_FORCE_INLINE uint32_t* data()
{
return (uint32_t*)((char*)this + sizeof(FixedBitmap));
}
NV_FORCE_INLINE const uint32_t* data() const
{
return (uint32_t*)((char*)this + sizeof(FixedBitmap));
}
private:
FixedBitmap(const FixedBitmap& that);
};
} // namespace Blast
} // namespace Nv
#endif // ifndef NVBLASTFIXEDBITMAP_H
|