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diff --git a/3rdparty/asio/include/asio/detail/descriptor_write_op.hpp b/3rdparty/asio/include/asio/detail/descriptor_write_op.hpp
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+//
+// detail/descriptor_write_op.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_DESCRIPTOR_WRITE_OP_HPP
+#define ASIO_DETAIL_DESCRIPTOR_WRITE_OP_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(__CYGWIN__)
+
+#include "asio/detail/bind_handler.hpp"
+#include "asio/detail/buffer_sequence_adapter.hpp"
+#include "asio/detail/descriptor_ops.hpp"
+#include "asio/detail/fenced_block.hpp"
+#include "asio/detail/handler_work.hpp"
+#include "asio/detail/memory.hpp"
+#include "asio/detail/reactor_op.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename ConstBufferSequence>
+class descriptor_write_op_base : public reactor_op
+{
+public:
+ descriptor_write_op_base(const asio::error_code& success_ec,
+ int descriptor, const ConstBufferSequence& buffers,
+ func_type complete_func)
+ : reactor_op(success_ec,
+ &descriptor_write_op_base::do_perform, complete_func),
+ descriptor_(descriptor),
+ buffers_(buffers)
+ {
+ }
+
+ static status do_perform(reactor_op* base)
+ {
+ descriptor_write_op_base* o(static_cast<descriptor_write_op_base*>(base));
+
+ typedef buffer_sequence_adapter<asio::const_buffer,
+ ConstBufferSequence> bufs_type;
+
+ status result;
+ if (bufs_type::is_single_buffer)
+ {
+ result = descriptor_ops::non_blocking_write1(o->descriptor_,
+ bufs_type::first(o->buffers_).data(),
+ bufs_type::first(o->buffers_).size(),
+ o->ec_, o->bytes_transferred_) ? done : not_done;
+ }
+ else
+ {
+ bufs_type bufs(o->buffers_);
+ result = descriptor_ops::non_blocking_write(o->descriptor_,
+ bufs.buffers(), bufs.count(), o->ec_, o->bytes_transferred_)
+ ? done : not_done;
+ }
+
+ ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_write",
+ o->ec_, o->bytes_transferred_));
+
+ return result;
+ }
+
+private:
+ int descriptor_;
+ ConstBufferSequence buffers_;
+};
+
+template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
+class descriptor_write_op
+ : public descriptor_write_op_base<ConstBufferSequence>
+{
+public:
+ ASIO_DEFINE_HANDLER_PTR(descriptor_write_op);
+
+ descriptor_write_op(const asio::error_code& success_ec,
+ int descriptor, const ConstBufferSequence& buffers,
+ Handler& handler, const IoExecutor& io_ex)
+ : descriptor_write_op_base<ConstBufferSequence>(success_ec,
+ descriptor, buffers, &descriptor_write_op::do_complete),
+ handler_(ASIO_MOVE_CAST(Handler)(handler)),
+ work_(handler_, io_ex)
+ {
+ }
+
+ static void do_complete(void* owner, operation* base,
+ const asio::error_code& /*ec*/,
+ std::size_t /*bytes_transferred*/)
+ {
+ // Take ownership of the handler object.
+ descriptor_write_op* o(static_cast<descriptor_write_op*>(base));
+ ptr p = { asio::detail::addressof(o->handler_), o, o };
+
+ ASIO_HANDLER_COMPLETION((*o));
+
+ // Take ownership of the operation's outstanding work.
+ handler_work<Handler, IoExecutor> w(
+ ASIO_MOVE_CAST2(handler_work<Handler, IoExecutor>)(
+ o->work_));
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made. Even if we're not about to make an upcall, a
+ // sub-object of the handler may be the true owner of the memory associated
+ // with the handler. Consequently, a local copy of the handler is required
+ // to ensure that any owning sub-object remains valid until after we have
+ // deallocated the memory here.
+ detail::binder2<Handler, asio::error_code, std::size_t>
+ handler(o->handler_, o->ec_, o->bytes_transferred_);
+ p.h = asio::detail::addressof(handler.handler_);
+ p.reset();
+
+ // Make the upcall if required.
+ if (owner)
+ {
+ fenced_block b(fenced_block::half);
+ ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
+ w.complete(handler, handler.handler_);
+ ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ Handler handler_;
+ handler_work<Handler, IoExecutor> work_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // !defined(ASIO_WINDOWS) && !defined(__CYGWIN__)
+
+#endif // ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP