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diff --git a/3rdparty/asio/include/asio/detail/winrt_timer_scheduler.hpp b/3rdparty/asio/include/asio/detail/winrt_timer_scheduler.hpp
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+//
+// detail/winrt_timer_scheduler.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 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 ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
+#define ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if defined(ASIO_WINDOWS_RUNTIME)
+
+#include <cstddef>
+#include "asio/detail/event.hpp"
+#include "asio/detail/limits.hpp"
+#include "asio/detail/mutex.hpp"
+#include "asio/detail/op_queue.hpp"
+#include "asio/detail/thread.hpp"
+#include "asio/detail/timer_queue_base.hpp"
+#include "asio/detail/timer_queue_set.hpp"
+#include "asio/detail/wait_op.hpp"
+#include "asio/execution_context.hpp"
+
+#if defined(ASIO_HAS_IOCP)
+# include "asio/detail/win_iocp_io_context.hpp"
+#else // defined(ASIO_HAS_IOCP)
+# include "asio/detail/scheduler.hpp"
+#endif // defined(ASIO_HAS_IOCP)
+
+#if defined(ASIO_HAS_IOCP)
+# include "asio/detail/thread.hpp"
+#endif // defined(ASIO_HAS_IOCP)
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+class winrt_timer_scheduler
+ : public execution_context_service_base<winrt_timer_scheduler>
+{
+public:
+ // Constructor.
+ ASIO_DECL winrt_timer_scheduler(execution_context& context);
+
+ // Destructor.
+ ASIO_DECL ~winrt_timer_scheduler();
+
+ // Destroy all user-defined handler objects owned by the service.
+ ASIO_DECL void shutdown();
+
+ // Recreate internal descriptors following a fork.
+ ASIO_DECL void notify_fork(execution_context::fork_event fork_ev);
+
+ // Initialise the task. No effect as this class uses its own thread.
+ ASIO_DECL void init_task();
+
+ // Add a new timer queue to the reactor.
+ template <typename Time_Traits>
+ void add_timer_queue(timer_queue<Time_Traits>& queue);
+
+ // Remove a timer queue from the reactor.
+ template <typename Time_Traits>
+ void remove_timer_queue(timer_queue<Time_Traits>& queue);
+
+ // Schedule a new operation in the given timer queue to expire at the
+ // specified absolute time.
+ template <typename Time_Traits>
+ void schedule_timer(timer_queue<Time_Traits>& queue,
+ const typename Time_Traits::time_type& time,
+ typename timer_queue<Time_Traits>::per_timer_data& timer, wait_op* op);
+
+ // Cancel the timer operations associated with the given token. Returns the
+ // number of operations that have been posted or dispatched.
+ template <typename Time_Traits>
+ std::size_t cancel_timer(timer_queue<Time_Traits>& queue,
+ typename timer_queue<Time_Traits>::per_timer_data& timer,
+ std::size_t max_cancelled = (std::numeric_limits<std::size_t>::max)());
+
+ // Move the timer operations associated with the given timer.
+ template <typename Time_Traits>
+ void move_timer(timer_queue<Time_Traits>& queue,
+ typename timer_queue<Time_Traits>::per_timer_data& to,
+ typename timer_queue<Time_Traits>::per_timer_data& from);
+
+private:
+ // Run the select loop in the thread.
+ ASIO_DECL void run_thread();
+
+ // Entry point for the select loop thread.
+ ASIO_DECL static void call_run_thread(winrt_timer_scheduler* reactor);
+
+ // Helper function to add a new timer queue.
+ ASIO_DECL void do_add_timer_queue(timer_queue_base& queue);
+
+ // Helper function to remove a timer queue.
+ ASIO_DECL void do_remove_timer_queue(timer_queue_base& queue);
+
+ // The scheduler implementation used to post completions.
+#if defined(ASIO_HAS_IOCP)
+ typedef class win_iocp_io_context scheduler_impl;
+#else
+ typedef class scheduler scheduler_impl;
+#endif
+ scheduler_impl& scheduler_;
+
+ // Mutex used to protect internal variables.
+ asio::detail::mutex mutex_;
+
+ // Event used to wake up background thread.
+ asio::detail::event event_;
+
+ // The timer queues.
+ timer_queue_set timer_queues_;
+
+ // The background thread that is waiting for timers to expire.
+ asio::detail::thread* thread_;
+
+ // Does the background thread need to stop.
+ bool stop_thread_;
+
+ // Whether the service has been shut down.
+ bool shutdown_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#include "asio/detail/impl/winrt_timer_scheduler.hpp"
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/detail/impl/winrt_timer_scheduler.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // defined(ASIO_WINDOWS_RUNTIME)
+
+#endif // ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP