1 //
2 // detail/timer_queue_base.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2018 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 ASIO_DETAIL_TIMER_QUEUE_BASE_HPP
12 #define ASIO_DETAIL_TIMER_QUEUE_BASE_HPP
13 
14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
15 # pragma once
16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17 
18 #include "asio/detail/config.hpp"
19 #include "asio/detail/noncopyable.hpp"
20 #include "asio/detail/op_queue.hpp"
21 #include "asio/detail/operation.hpp"
22 
23 #include "asio/detail/push_options.hpp"
24 
25 namespace asio {
26 namespace detail {
27 
28 class timer_queue_base
29   : private noncopyable
30 {
31 public:
32   // Constructor.
timer_queue_base()33   timer_queue_base() : next_(0) {}
34 
35   // Destructor.
~timer_queue_base()36   virtual ~timer_queue_base() {}
37 
38   // Whether there are no timers in the queue.
39   virtual bool empty() const = 0;
40 
41   // Get the time to wait until the next timer.
42   virtual long wait_duration_msec(long max_duration) const = 0;
43 
44   // Get the time to wait until the next timer.
45   virtual long wait_duration_usec(long max_duration) const = 0;
46 
47   // Dequeue all ready timers.
48   virtual void get_ready_timers(op_queue<operation>& ops) = 0;
49 
50   // Dequeue all timers.
51   virtual void get_all_timers(op_queue<operation>& ops) = 0;
52 
53 private:
54   friend class timer_queue_set;
55 
56   // Next timer queue in the set.
57   timer_queue_base* next_;
58 };
59 
60 template <typename Time_Traits>
61 class timer_queue;
62 
63 } // namespace detail
64 } // namespace asio
65 
66 #include "asio/detail/pop_options.hpp"
67 
68 #endif // ASIO_DETAIL_TIMER_QUEUE_BASE_HPP
69