summaryrefslogtreecommitdiff
path: root/boost/thread/concurrent_queues/detail/sync_queue_base.hpp
blob: c570da95051eb46831d34bf01780f327d18e1839 (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
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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
#ifndef BOOST_THREAD_CONCURRENT_QUEUES_DETAIL_SYNC_QUEUE_BASE_HPP
#define BOOST_THREAD_CONCURRENT_QUEUES_DETAIL_SYNC_QUEUE_BASE_HPP

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Vicente J. Botet Escriba 2013-2017. 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)
//
// See http://www.boost.org/libs/thread for documentation.
//
//////////////////////////////////////////////////////////////////////////////

#include <boost/bind.hpp>

#include <boost/thread/detail/config.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/detail/move.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/concurrent_queues/queue_op_status.hpp>

#include <boost/chrono/time_point.hpp>
#include <boost/throw_exception.hpp>

#include <boost/config/abi_prefix.hpp>

namespace boost
{
namespace concurrent
{
namespace detail
{

  template <class ValueType, class Queue>
  class sync_queue_base
  {
  public:
    typedef ValueType value_type;
    typedef Queue underlying_queue_type;
    typedef typename Queue::size_type size_type;
    typedef queue_op_status op_status;

    // Constructors/Assignment/Destructors
    BOOST_THREAD_NO_COPYABLE(sync_queue_base)
    inline sync_queue_base();
    //template <typename Range>
    //inline explicit sync_queue(Range range);
    inline ~sync_queue_base();

    // Observers
    inline bool empty() const;
    inline bool full() const;
    inline size_type size() const;
    inline bool closed() const;

    // Modifiers
    inline void close();

    inline underlying_queue_type underlying_queue() {
      lock_guard<mutex> lk(mtx_);
      return boost::move(data_);
    }

  protected:
    mutable mutex mtx_;
    condition_variable not_empty_;
    underlying_queue_type data_;
    bool closed_;

    inline bool empty(unique_lock<mutex>& ) const BOOST_NOEXCEPT
    {
      return data_.empty();
    }
    inline bool empty(lock_guard<mutex>& ) const BOOST_NOEXCEPT
    {
      return data_.empty();
    }

    inline size_type size(lock_guard<mutex>& ) const BOOST_NOEXCEPT
    {
      return data_.size();
    }
    inline bool closed(unique_lock<mutex>& lk) const;
    inline bool closed(lock_guard<mutex>& lk) const;

    inline void throw_if_closed(unique_lock<mutex>&);
    inline void throw_if_closed(lock_guard<mutex>&);

    inline bool not_empty_or_closed(unique_lock<mutex>& ) const;

    inline bool wait_until_not_empty_or_closed(unique_lock<mutex>& lk);
    template <class WClock, class Duration>
    queue_op_status wait_until_not_empty_or_closed_until(unique_lock<mutex>& lk, chrono::time_point<WClock,Duration> const&tp);
    template <class WClock, class Duration>
    queue_op_status wait_until_closed_until(unique_lock<mutex>& lk, chrono::time_point<WClock,Duration> const&tp);

    inline void notify_not_empty_if_needed(unique_lock<mutex>& )
    {
      not_empty_.notify_one();
    }
    inline void notify_not_empty_if_needed(lock_guard<mutex>& )
    {
      not_empty_.notify_one();
    }

  };

  template <class ValueType, class Queue>
  sync_queue_base<ValueType, Queue>::sync_queue_base() :
    data_(), closed_(false)
  {
    BOOST_ASSERT(data_.empty());
  }

  template <class ValueType, class Queue>
  sync_queue_base<ValueType, Queue>::~sync_queue_base()
  {
  }

  template <class ValueType, class Queue>
  void sync_queue_base<ValueType, Queue>::close()
  {
    {
      lock_guard<mutex> lk(mtx_);
      closed_ = true;
    }
    not_empty_.notify_all();
  }

  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::closed() const
  {
    lock_guard<mutex> lk(mtx_);
    return closed(lk);
  }
  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::closed(unique_lock<mutex>&) const
  {
    return closed_;
  }
  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::closed(lock_guard<mutex>&) const
  {
    return closed_;
  }

  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::empty() const
  {
    lock_guard<mutex> lk(mtx_);
    return empty(lk);
  }
  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::full() const
  {
    return false;
  }

  template <class ValueType, class Queue>
  typename sync_queue_base<ValueType, Queue>::size_type sync_queue_base<ValueType, Queue>::size() const
  {
    lock_guard<mutex> lk(mtx_);
    return size(lk);
  }

  template <class ValueType, class Queue>
  void sync_queue_base<ValueType, Queue>::throw_if_closed(unique_lock<mutex>& lk)
  {
    if (closed(lk))
    {
      BOOST_THROW_EXCEPTION( sync_queue_is_closed() );
    }
  }
  template <class ValueType, class Queue>
  void sync_queue_base<ValueType, Queue>::throw_if_closed(lock_guard<mutex>& lk)
  {
    if (closed(lk))
    {
      BOOST_THROW_EXCEPTION( sync_queue_is_closed() );
    }
  }

  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::not_empty_or_closed(unique_lock<mutex>& ) const
  {
    return ! data_.empty() || closed_;
  }

  template <class ValueType, class Queue>
  bool sync_queue_base<ValueType, Queue>::wait_until_not_empty_or_closed(unique_lock<mutex>& lk)
  {
    not_empty_.wait(lk, boost::bind(&sync_queue_base<ValueType, Queue>::not_empty_or_closed, boost::ref(*this), boost::ref(lk)));
    if (! empty(lk)) return false; // success
    return true; // closed
  }

  template <class ValueType, class Queue>
  template <class WClock, class Duration>
  queue_op_status sync_queue_base<ValueType, Queue>::wait_until_not_empty_or_closed_until(unique_lock<mutex>& lk, chrono::time_point<WClock,Duration> const&tp)
  {
    if (! not_empty_.wait_until(lk, tp, boost::bind(&sync_queue_base<ValueType, Queue>::not_empty_or_closed, boost::ref(*this), boost::ref(lk))))
      return queue_op_status::timeout;
    if (! empty(lk)) return queue_op_status::success;
    return queue_op_status::closed;
  }

  template <class ValueType, class Queue>
  template <class WClock, class Duration>
  queue_op_status sync_queue_base<ValueType, Queue>::wait_until_closed_until(unique_lock<mutex>& lk, chrono::time_point<WClock,Duration> const&tp)
  {
    bool (sync_queue_base<ValueType, Queue>::*closed_function_ptr)(unique_lock<mutex>&) const = &sync_queue_base<ValueType, Queue>::closed;
    if (! not_empty_.wait_until(lk, tp, boost::bind(closed_function_ptr, boost::ref(*this), boost::ref(lk))))
      return queue_op_status::timeout;
    return queue_op_status::closed;
  }

} // detail
} // concurrent
} // boost

#include <boost/config/abi_suffix.hpp>

#endif