blob: ecd155a409a879a36d3ec796bfb1458ee656ffdc (
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
|
//
// MemoryPool.cpp
//
// Library: Foundation
// Package: Core
// Module: MemoryPool
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/MemoryPool.h"
#include "Poco/Exception.h"
namespace Poco {
MemoryPool::MemoryPool(std::size_t blockLength, int preAlloc, int maxAlloc):
_blockSize(blockLength),
_maxAlloc(maxAlloc),
_allocated(preAlloc)
{
poco_assert (maxAlloc == 0 || maxAlloc >= preAlloc);
poco_assert (preAlloc >= 0 && maxAlloc >= 0);
int r = BLOCK_RESERVE;
if (preAlloc > r)
r = preAlloc;
if (maxAlloc > 0 && maxAlloc < r)
r = maxAlloc;
_blocks.reserve(r);
try
{
for (int i = 0; i < preAlloc; ++i)
{
_blocks.push_back(new char[_blockSize]);
}
}
catch (...)
{
clear();
throw;
}
}
MemoryPool::~MemoryPool()
{
clear();
}
void MemoryPool::clear()
{
for (BlockVec::iterator it = _blocks.begin(); it != _blocks.end(); ++it)
{
delete [] *it;
}
_blocks.clear();
}
void* MemoryPool::get()
{
FastMutex::ScopedLock lock(_mutex);
if (_blocks.empty())
{
if (_maxAlloc == 0 || _allocated < _maxAlloc)
{
++_allocated;
return new char[_blockSize];
}
else throw OutOfMemoryException("MemoryPool exhausted");
}
else
{
char* ptr = _blocks.back();
_blocks.pop_back();
return ptr;
}
}
void MemoryPool::release(void* ptr)
{
FastMutex::ScopedLock lock(_mutex);
try
{
_blocks.push_back(reinterpret_cast<char*>(ptr));
}
catch (...)
{
delete [] reinterpret_cast<char*>(ptr);
}
}
} // namespace Poco
|
