blob: adab0a7a61bbb38b6588f871476fa4724777fdf6 (
plain)
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
|
//
// detail/recycling_allocator.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//
#ifndef BOOST_ASIO_DETAIL_RECYCLING_ALLOCATOR_HPP
#define BOOST_ASIO_DETAIL_RECYCLING_ALLOCATOR_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <boost/asio/detail/memory.hpp>
#include <boost/asio/detail/thread_context.hpp>
#include <boost/asio/detail/thread_info_base.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename T>
class recycling_allocator
{
public:
typedef T value_type;
template <typename U>
struct rebind
{
typedef recycling_allocator<U> other;
};
recycling_allocator()
{
}
template <typename U>
recycling_allocator(const recycling_allocator<U>&)
{
}
T* allocate(std::size_t n)
{
typedef thread_context::thread_call_stack call_stack;
void* p = thread_info_base::allocate(call_stack::top(), sizeof(T) * n);
return static_cast<T*>(p);
}
void deallocate(T* p, std::size_t n)
{
typedef thread_context::thread_call_stack call_stack;
thread_info_base::deallocate(call_stack::top(), p, sizeof(T) * n);
}
};
template <>
class recycling_allocator<void>
{
public:
typedef void value_type;
template <typename U>
struct rebind
{
typedef recycling_allocator<U> other;
};
recycling_allocator()
{
}
template <typename U>
recycling_allocator(const recycling_allocator<U>&)
{
}
};
template <typename Allocator>
struct get_recycling_allocator
{
typedef Allocator type;
static type get(const Allocator& a) { return a; }
};
template <typename T>
struct get_recycling_allocator<std::allocator<T> >
{
typedef recycling_allocator<T> type;
static type get(const std::allocator<T>&) { return type(); }
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_DETAIL_RECYCLING_ALLOCATOR_HPP
|
