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diff --git a/src/third_party/boost-1.56.0/boost/asio/detail/win_event.hpp b/src/third_party/boost-1.56.0/boost/asio/detail/win_event.hpp
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index 8ef90c5266c..00000000000
--- a/src/third_party/boost-1.56.0/boost/asio/detail/win_event.hpp
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@@ -1,128 +0,0 @@
-//
-// detail/win_event.hpp
-// ~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2014 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_WIN_EVENT_HPP
-#define BOOST_ASIO_DETAIL_WIN_EVENT_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include <boost/asio/detail/config.hpp>
-
-#if defined(BOOST_ASIO_WINDOWS)
-
-#include <boost/asio/detail/assert.hpp>
-#include <boost/asio/detail/noncopyable.hpp>
-#include <boost/asio/detail/socket_types.hpp>
-
-#include <boost/asio/detail/push_options.hpp>
-
-namespace boost {
-namespace asio {
-namespace detail {
-
-class win_event
- : private noncopyable
-{
-public:
- // Constructor.
- BOOST_ASIO_DECL win_event();
-
- // Destructor.
- BOOST_ASIO_DECL ~win_event();
-
- // Signal the event. (Retained for backward compatibility.)
- template <typename Lock>
- void signal(Lock& lock)
- {
- this->signal_all(lock);
- }
-
- // Signal all waiters.
- template <typename Lock>
- void signal_all(Lock& lock)
- {
- BOOST_ASIO_ASSERT(lock.locked());
- (void)lock;
- state_ |= 1;
- ::SetEvent(events_[0]);
- }
-
- // Unlock the mutex and signal one waiter.
- template <typename Lock>
- void unlock_and_signal_one(Lock& lock)
- {
- BOOST_ASIO_ASSERT(lock.locked());
- state_ |= 1;
- bool have_waiters = (state_ > 1);
- lock.unlock();
- if (have_waiters)
- ::SetEvent(events_[1]);
- }
-
- // If there's a waiter, unlock the mutex and signal it.
- template <typename Lock>
- bool maybe_unlock_and_signal_one(Lock& lock)
- {
- BOOST_ASIO_ASSERT(lock.locked());
- state_ |= 1;
- if (state_ > 1)
- {
- lock.unlock();
- ::SetEvent(events_[1]);
- return true;
- }
- return false;
- }
-
- // Reset the event.
- template <typename Lock>
- void clear(Lock& lock)
- {
- BOOST_ASIO_ASSERT(lock.locked());
- (void)lock;
- ::ResetEvent(events_[0]);
- state_ &= ~std::size_t(1);
- }
-
- // Wait for the event to become signalled.
- template <typename Lock>
- void wait(Lock& lock)
- {
- BOOST_ASIO_ASSERT(lock.locked());
- while ((state_ & 1) == 0)
- {
- state_ += 2;
- lock.unlock();
- ::WaitForMultipleObjects(2, events_, false, INFINITE);
- lock.lock();
- state_ -= 2;
- }
- }
-
-private:
- HANDLE events_[2];
- std::size_t state_;
-};
-
-} // namespace detail
-} // namespace asio
-} // namespace boost
-
-#include <boost/asio/detail/pop_options.hpp>
-
-#if defined(BOOST_ASIO_HEADER_ONLY)
-# include <boost/asio/detail/impl/win_event.ipp>
-#endif // defined(BOOST_ASIO_HEADER_ONLY)
-
-#endif // defined(BOOST_ASIO_WINDOWS)
-
-#endif // BOOST_ASIO_DETAIL_WIN_EVENT_HPP