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
|
//
// shared_ptr_alloc_test.cpp - use to evaluate the impact of count allocations
//
// Copyright (c) 2002, 2003 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/shared_ptr.hpp>
#include <boost/config.hpp>
#include <boost/detail/quick_allocator.hpp>
#include <iostream>
#include <vector>
#include <ctime>
#include <cstddef>
#include <memory>
int const n = 1024 * 1024;
template<class T> void test(T * = 0)
{
std::clock_t t = std::clock();
std::clock_t t2;
{
std::vector< boost::shared_ptr<T> > v;
for(int i = 0; i < n; ++i)
{
boost::shared_ptr<T> pi(new T(i));
v.push_back(pi);
}
t2 = std::clock();
}
std::clock_t t3 = std::clock();
std::cout << " " << static_cast<double>(t3 - t) / CLOCKS_PER_SEC << " seconds, " << static_cast<double>(t2 - t) / CLOCKS_PER_SEC << " + " << static_cast<double>(t3 - t2) / CLOCKS_PER_SEC << ".\n";
}
class X
{
public:
explicit X(int n): n_(n)
{
}
void * operator new(std::size_t)
{
return std::allocator<X>().allocate(1, static_cast<X*>(0));
}
void operator delete(void * p)
{
std::allocator<X>().deallocate(static_cast<X*>(p), 1);
}
private:
X(X const &);
X & operator=(X const &);
int n_;
};
class Y
{
public:
explicit Y(int n): n_(n)
{
}
void * operator new(std::size_t n)
{
return boost::detail::quick_allocator<Y>::alloc(n);
}
void operator delete(void * p, std::size_t n)
{
boost::detail::quick_allocator<Y>::dealloc(p, n);
}
private:
Y(Y const &);
Y & operator=(Y const &);
int n_;
};
class Z: public Y
{
public:
explicit Z(int n): Y(n), m_(n + 1)
{
}
private:
Z(Z const &);
Z & operator=(Z const &);
int m_;
};
int main()
{
std::cout << BOOST_COMPILER "\n";
std::cout << BOOST_PLATFORM "\n";
std::cout << BOOST_STDLIB "\n";
#if defined(BOOST_HAS_THREADS)
std::cout << "BOOST_HAS_THREADS: (defined)\n";
#else
std::cout << "BOOST_HAS_THREADS: (not defined)\n";
#endif
#if defined(BOOST_SP_USE_STD_ALLOCATOR)
std::cout << "BOOST_SP_USE_STD_ALLOCATOR: (defined)\n";
#else
std::cout << "BOOST_SP_USE_STD_ALLOCATOR: (not defined)\n";
#endif
#if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
std::cout << "BOOST_SP_USE_QUICK_ALLOCATOR: (defined)\n";
#else
std::cout << "BOOST_SP_USE_QUICK_ALLOCATOR: (not defined)\n";
#endif
#if defined(BOOST_QA_PAGE_SIZE)
std::cout << "BOOST_QA_PAGE_SIZE: " << BOOST_QA_PAGE_SIZE << "\n";
#else
std::cout << "BOOST_QA_PAGE_SIZE: (not defined)\n";
#endif
std::cout << n << " shared_ptr<int> allocations + deallocations:\n";
test<int>();
test<int>();
test<int>();
std::cout << n << " shared_ptr<X> allocations + deallocations:\n";
test<X>();
test<X>();
test<X>();
std::cout << n << " shared_ptr<Y> allocations + deallocations:\n";
test<Y>();
test<Y>();
test<Y>();
std::cout << n << " shared_ptr<Z> allocations + deallocations:\n";
test<Z>();
test<Z>();
test<Z>();
}
|
