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diff --git a/3rdparty/asio/include/asio/detail/winapp_thread.hpp b/3rdparty/asio/include/asio/detail/winapp_thread.hpp
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+//
+// detail/winapp_thread.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_WINAPP_THREAD_HPP
+#define ASIO_DETAIL_WINAPP_THREAD_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) && defined(ASIO_WINDOWS_APP)
+
+#include "asio/detail/noncopyable.hpp"
+#include "asio/detail/scoped_ptr.hpp"
+#include "asio/detail/socket_types.hpp"
+#include "asio/detail/throw_error.hpp"
+#include "asio/error.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+DWORD WINAPI winapp_thread_function(LPVOID arg);
+
+class winapp_thread
+ : private noncopyable
+{
+public:
+ // Constructor.
+ template <typename Function>
+ winapp_thread(Function f, unsigned int = 0)
+ {
+ scoped_ptr<func_base> arg(new func<Function>(f));
+ DWORD thread_id = 0;
+ thread_ = ::CreateThread(0, 0, winapp_thread_function,
+ arg.get(), 0, &thread_id);
+ if (!thread_)
+ {
+ DWORD last_error = ::GetLastError();
+ asio::error_code ec(last_error,
+ asio::error::get_system_category());
+ asio::detail::throw_error(ec, "thread");
+ }
+ arg.release();
+ }
+
+ // Destructor.
+ ~winapp_thread()
+ {
+ ::CloseHandle(thread_);
+ }
+
+ // Wait for the thread to exit.
+ void join()
+ {
+ ::WaitForSingleObjectEx(thread_, INFINITE, false);
+ }
+
+ // Get number of CPUs.
+ static std::size_t hardware_concurrency()
+ {
+ SYSTEM_INFO system_info;
+ ::GetNativeSystemInfo(&system_info);
+ return system_info.dwNumberOfProcessors;
+ }
+
+private:
+ friend DWORD WINAPI winapp_thread_function(LPVOID arg);
+
+ class func_base
+ {
+ public:
+ virtual ~func_base() {}
+ virtual void run() = 0;
+ };
+
+ template <typename Function>
+ class func
+ : public func_base
+ {
+ public:
+ func(Function f)
+ : f_(f)
+ {
+ }
+
+ virtual void run()
+ {
+ f_();
+ }
+
+ private:
+ Function f_;
+ };
+
+ ::HANDLE thread_;
+};
+
+inline DWORD WINAPI winapp_thread_function(LPVOID arg)
+{
+ scoped_ptr<winapp_thread::func_base> func(
+ static_cast<winapp_thread::func_base*>(arg));
+ func->run();
+ return 0;
+}
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // defined(ASIO_WINDOWS) && defined(ASIO_WINDOWS_APP)
+
+#endif // ASIO_DETAIL_WINAPP_THREAD_HPP