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1 //
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2 // detail/win_event.hpp
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3 // ~~~~~~~~~~~~~~~~~~~~
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4 //
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5 // Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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6 //
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7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
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8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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9 //
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10
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11 #ifndef BOOST_ASIO_DETAIL_WIN_EVENT_HPP
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12 #define BOOST_ASIO_DETAIL_WIN_EVENT_HPP
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13
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14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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15 # pragma once
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16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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17
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18 #include <boost/asio/detail/config.hpp>
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19
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20 #if defined(BOOST_ASIO_WINDOWS)
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21
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22 #include <boost/asio/detail/assert.hpp>
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23 #include <boost/asio/detail/noncopyable.hpp>
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24 #include <boost/asio/detail/socket_types.hpp>
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25
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26 #include <boost/asio/detail/push_options.hpp>
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27
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28 namespace boost {
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29 namespace asio {
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30 namespace detail {
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31
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32 class win_event
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33 : private noncopyable
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34 {
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35 public:
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36 // Constructor.
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37 BOOST_ASIO_DECL win_event();
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38
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39 // Destructor.
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40 ~win_event()
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41 {
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42 ::CloseHandle(event_);
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43 }
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44
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45 // Signal the event.
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46 template <typename Lock>
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47 void signal(Lock& lock)
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48 {
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49 BOOST_ASIO_ASSERT(lock.locked());
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50 (void)lock;
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51 ::SetEvent(event_);
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52 }
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53
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54 // Signal the event and unlock the mutex.
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55 template <typename Lock>
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56 void signal_and_unlock(Lock& lock)
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57 {
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58 BOOST_ASIO_ASSERT(lock.locked());
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59 lock.unlock();
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60 ::SetEvent(event_);
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61 }
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62
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63 // Reset the event.
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64 template <typename Lock>
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65 void clear(Lock& lock)
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66 {
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67 BOOST_ASIO_ASSERT(lock.locked());
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68 (void)lock;
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69 ::ResetEvent(event_);
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70 }
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71
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72 // Wait for the event to become signalled.
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73 template <typename Lock>
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74 void wait(Lock& lock)
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75 {
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76 BOOST_ASIO_ASSERT(lock.locked());
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77 lock.unlock();
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78 ::WaitForSingleObject(event_, INFINITE);
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79 lock.lock();
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80 }
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81
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82 private:
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83 HANDLE event_;
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84 };
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85
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86 } // namespace detail
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87 } // namespace asio
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88 } // namespace boost
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89
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90 #include <boost/asio/detail/pop_options.hpp>
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91
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92 #if defined(BOOST_ASIO_HEADER_ONLY)
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93 # include <boost/asio/detail/impl/win_event.ipp>
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94 #endif // defined(BOOST_ASIO_HEADER_ONLY)
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95
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96 #endif // defined(BOOST_ASIO_WINDOWS)
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97
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98 #endif // BOOST_ASIO_DETAIL_WIN_EVENT_HPP
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