Statistics
| Revision:

root / tmp / org.txm.statsengine.r.core.win32 / res / win32 / library / BH / include / boost / asio / detail / win_iocp_overlapped_ptr.hpp @ 2486

History | View | Annotate | Download (3.5 kB)

1
//
2
// detail/win_iocp_overlapped_ptr.hpp
3
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4
//
5
// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6
//
7
// Distributed under the Boost Software License, Version 1.0. (See accompanying
8
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9
//
10

    
11
#ifndef BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_PTR_HPP
12
#define BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_PTR_HPP
13

    
14
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
15
# pragma once
16
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17

    
18
#include <boost/asio/detail/config.hpp>
19

    
20
#if defined(BOOST_ASIO_HAS_IOCP)
21

    
22
#include <boost/asio/io_service.hpp>
23
#include <boost/asio/detail/addressof.hpp>
24
#include <boost/asio/detail/handler_alloc_helpers.hpp>
25
#include <boost/asio/detail/noncopyable.hpp>
26
#include <boost/asio/detail/win_iocp_overlapped_op.hpp>
27
#include <boost/asio/detail/win_iocp_io_service.hpp>
28

    
29
#include <boost/asio/detail/push_options.hpp>
30

    
31
namespace boost {
32
namespace asio {
33
namespace detail {
34

    
35
// Wraps a handler to create an OVERLAPPED object for use with overlapped I/O.
36
class win_iocp_overlapped_ptr
37
  : private noncopyable
38
{
39
public:
40
  // Construct an empty win_iocp_overlapped_ptr.
41
  win_iocp_overlapped_ptr()
42
    : ptr_(0),
43
      iocp_service_(0)
44
  {
45
  }
46

    
47
  // Construct an win_iocp_overlapped_ptr to contain the specified handler.
48
  template <typename Handler>
49
  explicit win_iocp_overlapped_ptr(
50
      boost::asio::io_service& io_service, BOOST_ASIO_MOVE_ARG(Handler) handler)
51
    : ptr_(0),
52
      iocp_service_(0)
53
  {
54
    this->reset(io_service, BOOST_ASIO_MOVE_CAST(Handler)(handler));
55
  }
56

    
57
  // Destructor automatically frees the OVERLAPPED object unless released.
58
  ~win_iocp_overlapped_ptr()
59
  {
60
    reset();
61
  }
62

    
63
  // Reset to empty.
64
  void reset()
65
  {
66
    if (ptr_)
67
    {
68
      ptr_->destroy();
69
      ptr_ = 0;
70
      iocp_service_->work_finished();
71
      iocp_service_ = 0;
72
    }
73
  }
74

    
75
  // Reset to contain the specified handler, freeing any current OVERLAPPED
76
  // object.
77
  template <typename Handler>
78
  void reset(boost::asio::io_service& io_service, Handler handler)
79
  {
80
    typedef win_iocp_overlapped_op<Handler> op;
81
    typename op::ptr p = { boost::asio::detail::addressof(handler),
82
      boost_asio_handler_alloc_helpers::allocate(
83
        sizeof(op), handler), 0 };
84
    p.p = new (p.v) op(handler);
85

    
86
    BOOST_ASIO_HANDLER_CREATION((p.p, "io_service",
87
          &io_service.impl_, "overlapped"));
88

    
89
    io_service.impl_.work_started();
90
    reset();
91
    ptr_ = p.p;
92
    p.v = p.p = 0;
93
    iocp_service_ = &io_service.impl_;
94
  }
95

    
96
  // Get the contained OVERLAPPED object.
97
  OVERLAPPED* get()
98
  {
99
    return ptr_;
100
  }
101

    
102
  // Get the contained OVERLAPPED object.
103
  const OVERLAPPED* get() const
104
  {
105
    return ptr_;
106
  }
107

    
108
  // Release ownership of the OVERLAPPED object.
109
  OVERLAPPED* release()
110
  {
111
    if (ptr_)
112
      iocp_service_->on_pending(ptr_);
113

    
114
    OVERLAPPED* tmp = ptr_;
115
    ptr_ = 0;
116
    iocp_service_ = 0;
117
    return tmp;
118
  }
119

    
120
  // Post completion notification for overlapped operation. Releases ownership.
121
  void complete(const boost::system::error_code& ec,
122
      std::size_t bytes_transferred)
123
  {
124
    if (ptr_)
125
    {
126
      iocp_service_->on_completion(ptr_, ec,
127
          static_cast<DWORD>(bytes_transferred));
128
      ptr_ = 0;
129
      iocp_service_ = 0;
130
    }
131
  }
132

    
133
private:
134
  win_iocp_operation* ptr_;
135
  win_iocp_io_service* iocp_service_;
136
};
137

    
138
} // namespace detail
139
} // namespace asio
140
} // namespace boost
141

    
142
#include <boost/asio/detail/pop_options.hpp>
143

    
144
#endif // defined(BOOST_ASIO_HAS_IOCP)
145

    
146
#endif // BOOST_ASIO_DETAIL_WIN_IOCP_OVERLAPPED_PTR_HPP