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
|
// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include "MemoryPool.h"
#include "cppassert.h"
#include <cstring>
using namespace CPlusPlus;
MemoryPool::MemoryPool()
: _blocks(nullptr),
_allocatedBlocks(0),
_blockCount(-1),
_ptr(nullptr),
_end(nullptr)
{ }
MemoryPool::~MemoryPool()
{
if (_blocks) {
for (int i = 0; i < _allocatedBlocks; ++i) {
if (char *b = _blocks[i])
std::free(b);
}
std::free(_blocks);
}
}
void MemoryPool::reset()
{
_blockCount = -1;
_ptr = _end = nullptr;
}
void *MemoryPool::allocate_helper(size_t size)
{
CPP_CHECK(size < BLOCK_SIZE);
if (++_blockCount == _allocatedBlocks) {
if (! _allocatedBlocks)
_allocatedBlocks = DEFAULT_BLOCK_COUNT;
else
_allocatedBlocks *= 2;
_blocks = (char **) realloc(_blocks, sizeof(char *) * _allocatedBlocks);
for (int index = _blockCount; index < _allocatedBlocks; ++index)
_blocks[index] = nullptr;
}
char *&block = _blocks[_blockCount];
if (! block)
block = (char *) std::malloc(BLOCK_SIZE);
_ptr = block;
_end = _ptr + BLOCK_SIZE;
void *addr = _ptr;
_ptr += size;
return addr;
}
Managed::Managed()
{ }
Managed::~Managed()
{ }
void *Managed::operator new(size_t size, MemoryPool *pool)
{ return pool->allocate(size); }
void Managed::operator delete(void *)
{ }
void Managed::operator delete(void *, MemoryPool *)
{ }
|
