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Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/win_iocp_socket_service.hpp')
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diff --git a/3rdParty/Boost/src/boost/asio/detail/win_iocp_socket_service.hpp b/3rdParty/Boost/src/boost/asio/detail/win_iocp_socket_service.hpp
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+++ b/3rdParty/Boost/src/boost/asio/detail/win_iocp_socket_service.hpp
@@ -0,0 +1,2417 @@
+//
+// win_iocp_socket_service.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 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_IOCP_SOCKET_SERVICE_HPP
+#define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+#include <boost/asio/detail/win_iocp_io_service_fwd.hpp>
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+
+#include <boost/asio/detail/push_options.hpp>
+#include <cstring>
+#include <boost/shared_ptr.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/error.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/socket_base.hpp>
+#include <boost/asio/detail/bind_handler.hpp>
+#include <boost/asio/detail/handler_alloc_helpers.hpp>
+#include <boost/asio/detail/handler_invoke_helpers.hpp>
+#include <boost/asio/detail/mutex.hpp>
+#include <boost/asio/detail/select_reactor.hpp>
+#include <boost/asio/detail/socket_holder.hpp>
+#include <boost/asio/detail/socket_ops.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+#include <boost/asio/detail/win_iocp_io_service.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+template <typename Protocol>
+class win_iocp_socket_service
+ : public boost::asio::detail::service_base<win_iocp_socket_service<Protocol> >
+{
+public:
+ // The protocol type.
+ typedef Protocol protocol_type;
+
+ // The endpoint type.
+ typedef typename Protocol::endpoint endpoint_type;
+
+ // Base class for all operations.
+ typedef win_iocp_io_service::operation operation;
+
+ struct noop_deleter { void operator()(void*) {} };
+ typedef boost::shared_ptr<void> shared_cancel_token_type;
+ typedef boost::weak_ptr<void> weak_cancel_token_type;
+
+ // The native type of a socket.
+ class native_type
+ {
+ public:
+ native_type(socket_type s)
+ : socket_(s),
+ have_remote_endpoint_(false)
+ {
+ }
+
+ native_type(socket_type s, const endpoint_type& ep)
+ : socket_(s),
+ have_remote_endpoint_(true),
+ remote_endpoint_(ep)
+ {
+ }
+
+ void operator=(socket_type s)
+ {
+ socket_ = s;
+ have_remote_endpoint_ = false;
+ remote_endpoint_ = endpoint_type();
+ }
+
+ operator socket_type() const
+ {
+ return socket_;
+ }
+
+ HANDLE as_handle() const
+ {
+ return reinterpret_cast<HANDLE>(socket_);
+ }
+
+ bool have_remote_endpoint() const
+ {
+ return have_remote_endpoint_;
+ }
+
+ endpoint_type remote_endpoint() const
+ {
+ return remote_endpoint_;
+ }
+
+ private:
+ socket_type socket_;
+ bool have_remote_endpoint_;
+ endpoint_type remote_endpoint_;
+ };
+
+ // The type of the reactor used for connect operations.
+ typedef detail::select_reactor<true> reactor_type;
+
+ // The implementation type of the socket.
+ class implementation_type
+ {
+ public:
+ // Default constructor.
+ implementation_type()
+ : socket_(invalid_socket),
+ flags_(0),
+ cancel_token_(),
+ protocol_(endpoint_type().protocol()),
+ next_(0),
+ prev_(0)
+ {
+ }
+
+ private:
+ // Only this service will have access to the internal values.
+ friend class win_iocp_socket_service;
+
+ // The native socket representation.
+ native_type socket_;
+
+ enum
+ {
+ enable_connection_aborted = 1, // User wants connection_aborted errors.
+ close_might_block = 2, // User set linger option for blocking close.
+ user_set_non_blocking = 4 // The user wants a non-blocking socket.
+ };
+
+ // Flags indicating the current state of the socket.
+ unsigned char flags_;
+
+ // We use a shared pointer as a cancellation token here to work around the
+ // broken Windows support for cancellation. MSDN says that when you call
+ // closesocket any outstanding WSARecv or WSASend operations will complete
+ // with the error ERROR_OPERATION_ABORTED. In practice they complete with
+ // ERROR_NETNAME_DELETED, which means you can't tell the difference between
+ // a local cancellation and the socket being hard-closed by the peer.
+ shared_cancel_token_type cancel_token_;
+
+ // The protocol associated with the socket.
+ protocol_type protocol_;
+
+ // Per-descriptor data used by the reactor.
+ reactor_type::per_descriptor_data reactor_data_;
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // The ID of the thread from which it is safe to cancel asynchronous
+ // operations. 0 means no asynchronous operations have been started yet.
+ // ~0 means asynchronous operations have been started from more than one
+ // thread, and cancellation is not supported for the socket.
+ DWORD safe_cancellation_thread_id_;
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Pointers to adjacent socket implementations in linked list.
+ implementation_type* next_;
+ implementation_type* prev_;
+ };
+
+ // The maximum number of buffers to support in a single operation.
+ enum { max_buffers = 64 < max_iov_len ? 64 : max_iov_len };
+
+ // Constructor.
+ win_iocp_socket_service(boost::asio::io_service& io_service)
+ : boost::asio::detail::service_base<
+ win_iocp_socket_service<Protocol> >(io_service),
+ iocp_service_(boost::asio::use_service<win_iocp_io_service>(io_service)),
+ reactor_(0),
+ mutex_(),
+ impl_list_(0)
+ {
+ }
+
+ // Destroy all user-defined handler objects owned by the service.
+ void shutdown_service()
+ {
+ // Close all implementations, causing all operations to complete.
+ boost::asio::detail::mutex::scoped_lock lock(mutex_);
+ implementation_type* impl = impl_list_;
+ while (impl)
+ {
+ boost::system::error_code ignored_ec;
+ close_for_destruction(*impl);
+ impl = impl->next_;
+ }
+ }
+
+ // Construct a new socket implementation.
+ void construct(implementation_type& impl)
+ {
+ impl.socket_ = invalid_socket;
+ impl.flags_ = 0;
+ impl.cancel_token_.reset();
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ impl.safe_cancellation_thread_id_ = 0;
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Insert implementation into linked list of all implementations.
+ boost::asio::detail::mutex::scoped_lock lock(mutex_);
+ impl.next_ = impl_list_;
+ impl.prev_ = 0;
+ if (impl_list_)
+ impl_list_->prev_ = &impl;
+ impl_list_ = &impl;
+ }
+
+ // Destroy a socket implementation.
+ void destroy(implementation_type& impl)
+ {
+ close_for_destruction(impl);
+
+ // Remove implementation from linked list of all implementations.
+ boost::asio::detail::mutex::scoped_lock lock(mutex_);
+ if (impl_list_ == &impl)
+ impl_list_ = impl.next_;
+ if (impl.prev_)
+ impl.prev_->next_ = impl.next_;
+ if (impl.next_)
+ impl.next_->prev_= impl.prev_;
+ impl.next_ = 0;
+ impl.prev_ = 0;
+ }
+
+ // Open a new socket implementation.
+ boost::system::error_code open(implementation_type& impl,
+ const protocol_type& protocol, boost::system::error_code& ec)
+ {
+ if (is_open(impl))
+ {
+ ec = boost::asio::error::already_open;
+ return ec;
+ }
+
+ socket_holder sock(socket_ops::socket(protocol.family(), protocol.type(),
+ protocol.protocol(), ec));
+ if (sock.get() == invalid_socket)
+ return ec;
+
+ HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock.get());
+ if (iocp_service_.register_handle(sock_as_handle, ec))
+ return ec;
+
+ impl.socket_ = sock.release();
+ impl.flags_ = 0;
+ impl.cancel_token_.reset(static_cast<void*>(0), noop_deleter());
+ impl.protocol_ = protocol;
+ ec = boost::system::error_code();
+ return ec;
+ }
+
+ // Assign a native socket to a socket implementation.
+ boost::system::error_code assign(implementation_type& impl,
+ const protocol_type& protocol, const native_type& native_socket,
+ boost::system::error_code& ec)
+ {
+ if (is_open(impl))
+ {
+ ec = boost::asio::error::already_open;
+ return ec;
+ }
+
+ if (iocp_service_.register_handle(native_socket.as_handle(), ec))
+ return ec;
+
+ impl.socket_ = native_socket;
+ impl.flags_ = 0;
+ impl.cancel_token_.reset(static_cast<void*>(0), noop_deleter());
+ impl.protocol_ = protocol;
+ ec = boost::system::error_code();
+ return ec;
+ }
+
+ // Determine whether the socket is open.
+ bool is_open(const implementation_type& impl) const
+ {
+ return impl.socket_ != invalid_socket;
+ }
+
+ // Destroy a socket implementation.
+ boost::system::error_code close(implementation_type& impl,
+ boost::system::error_code& ec)
+ {
+ if (is_open(impl))
+ {
+ // Check if the reactor was created, in which case we need to close the
+ // socket on the reactor as well to cancel any operations that might be
+ // running there.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (reactor)
+ reactor->close_descriptor(impl.socket_, impl.reactor_data_);
+
+ if (socket_ops::close(impl.socket_, ec) == socket_error_retval)
+ return ec;
+
+ impl.socket_ = invalid_socket;
+ impl.flags_ = 0;
+ impl.cancel_token_.reset();
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ impl.safe_cancellation_thread_id_ = 0;
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+ }
+
+ ec = boost::system::error_code();
+ return ec;
+ }
+
+ // Get the native socket representation.
+ native_type native(implementation_type& impl)
+ {
+ return impl.socket_;
+ }
+
+ // Cancel all operations associated with the socket.
+ boost::system::error_code cancel(implementation_type& impl,
+ boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+ else if (FARPROC cancel_io_ex_ptr = ::GetProcAddress(
+ ::GetModuleHandleA("KERNEL32"), "CancelIoEx"))
+ {
+ // The version of Windows supports cancellation from any thread.
+ typedef BOOL (WINAPI* cancel_io_ex_t)(HANDLE, LPOVERLAPPED);
+ cancel_io_ex_t cancel_io_ex = (cancel_io_ex_t)cancel_io_ex_ptr;
+ socket_type sock = impl.socket_;
+ HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock);
+ if (!cancel_io_ex(sock_as_handle, 0))
+ {
+ DWORD last_error = ::GetLastError();
+ if (last_error == ERROR_NOT_FOUND)
+ {
+ // ERROR_NOT_FOUND means that there were no operations to be
+ // cancelled. We swallow this error to match the behaviour on other
+ // platforms.
+ ec = boost::system::error_code();
+ }
+ else
+ {
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ }
+ }
+ else
+ {
+ ec = boost::system::error_code();
+ }
+ }
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ else if (impl.safe_cancellation_thread_id_ == 0)
+ {
+ // No operations have been started, so there's nothing to cancel.
+ ec = boost::system::error_code();
+ }
+ else if (impl.safe_cancellation_thread_id_ == ::GetCurrentThreadId())
+ {
+ // Asynchronous operations have been started from the current thread only,
+ // so it is safe to try to cancel them using CancelIo.
+ socket_type sock = impl.socket_;
+ HANDLE sock_as_handle = reinterpret_cast<HANDLE>(sock);
+ if (!::CancelIo(sock_as_handle))
+ {
+ DWORD last_error = ::GetLastError();
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ }
+ else
+ {
+ ec = boost::system::error_code();
+ }
+ }
+ else
+ {
+ // Asynchronous operations have been started from more than one thread,
+ // so cancellation is not safe.
+ ec = boost::asio::error::operation_not_supported;
+ }
+#else // defined(BOOST_ASIO_ENABLE_CANCELIO)
+ else
+ {
+ // Cancellation is not supported as CancelIo may not be used.
+ ec = boost::asio::error::operation_not_supported;
+ }
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ return ec;
+ }
+
+ // Determine whether the socket is at the out-of-band data mark.
+ bool at_mark(const implementation_type& impl,
+ boost::system::error_code& ec) const
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return false;
+ }
+
+ boost::asio::detail::ioctl_arg_type value = 0;
+ socket_ops::ioctl(impl.socket_, SIOCATMARK, &value, ec);
+ return ec ? false : value != 0;
+ }
+
+ // Determine the number of bytes available for reading.
+ std::size_t available(const implementation_type& impl,
+ boost::system::error_code& ec) const
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ boost::asio::detail::ioctl_arg_type value = 0;
+ socket_ops::ioctl(impl.socket_, FIONREAD, &value, ec);
+ return ec ? static_cast<std::size_t>(0) : static_cast<std::size_t>(value);
+ }
+
+ // Bind the socket to the specified local endpoint.
+ boost::system::error_code bind(implementation_type& impl,
+ const endpoint_type& endpoint, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec);
+ return ec;
+ }
+
+ // Place the socket into the state where it will listen for new connections.
+ boost::system::error_code listen(implementation_type& impl, int backlog,
+ boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ socket_ops::listen(impl.socket_, backlog, ec);
+ return ec;
+ }
+
+ // Set a socket option.
+ template <typename Option>
+ boost::system::error_code set_option(implementation_type& impl,
+ const Option& option, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ if (option.level(impl.protocol_) == custom_socket_option_level
+ && option.name(impl.protocol_) == enable_connection_aborted_option)
+ {
+ if (option.size(impl.protocol_) != sizeof(int))
+ {
+ ec = boost::asio::error::invalid_argument;
+ }
+ else
+ {
+ if (*reinterpret_cast<const int*>(option.data(impl.protocol_)))
+ impl.flags_ |= implementation_type::enable_connection_aborted;
+ else
+ impl.flags_ &= ~implementation_type::enable_connection_aborted;
+ ec = boost::system::error_code();
+ }
+ return ec;
+ }
+ else
+ {
+ if (option.level(impl.protocol_) == SOL_SOCKET
+ && option.name(impl.protocol_) == SO_LINGER)
+ {
+ const ::linger* linger_option =
+ reinterpret_cast<const ::linger*>(option.data(impl.protocol_));
+ if (linger_option->l_onoff != 0 && linger_option->l_linger != 0)
+ impl.flags_ |= implementation_type::close_might_block;
+ else
+ impl.flags_ &= ~implementation_type::close_might_block;
+ }
+
+ socket_ops::setsockopt(impl.socket_,
+ option.level(impl.protocol_), option.name(impl.protocol_),
+ option.data(impl.protocol_), option.size(impl.protocol_), ec);
+ return ec;
+ }
+ }
+
+ // Set a socket option.
+ template <typename Option>
+ boost::system::error_code get_option(const implementation_type& impl,
+ Option& option, boost::system::error_code& ec) const
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ if (option.level(impl.protocol_) == custom_socket_option_level
+ && option.name(impl.protocol_) == enable_connection_aborted_option)
+ {
+ if (option.size(impl.protocol_) != sizeof(int))
+ {
+ ec = boost::asio::error::invalid_argument;
+ }
+ else
+ {
+ int* target = reinterpret_cast<int*>(option.data(impl.protocol_));
+ if (impl.flags_ & implementation_type::enable_connection_aborted)
+ *target = 1;
+ else
+ *target = 0;
+ option.resize(impl.protocol_, sizeof(int));
+ ec = boost::system::error_code();
+ }
+ return ec;
+ }
+ else
+ {
+ size_t size = option.size(impl.protocol_);
+ socket_ops::getsockopt(impl.socket_,
+ option.level(impl.protocol_), option.name(impl.protocol_),
+ option.data(impl.protocol_), &size, ec);
+ if (!ec)
+ option.resize(impl.protocol_, size);
+ return ec;
+ }
+ }
+
+ // Perform an IO control command on the socket.
+ template <typename IO_Control_Command>
+ boost::system::error_code io_control(implementation_type& impl,
+ IO_Control_Command& command, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ socket_ops::ioctl(impl.socket_, command.name(),
+ static_cast<ioctl_arg_type*>(command.data()), ec);
+
+ if (!ec && command.name() == static_cast<int>(FIONBIO))
+ {
+ if (*static_cast<ioctl_arg_type*>(command.data()))
+ impl.flags_ |= implementation_type::user_set_non_blocking;
+ else
+ impl.flags_ &= ~implementation_type::user_set_non_blocking;
+ }
+
+ return ec;
+ }
+
+ // Get the local endpoint.
+ endpoint_type local_endpoint(const implementation_type& impl,
+ boost::system::error_code& ec) const
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return endpoint_type();
+ }
+
+ endpoint_type endpoint;
+ std::size_t addr_len = endpoint.capacity();
+ if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec))
+ return endpoint_type();
+ endpoint.resize(addr_len);
+ return endpoint;
+ }
+
+ // Get the remote endpoint.
+ endpoint_type remote_endpoint(const implementation_type& impl,
+ boost::system::error_code& ec) const
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return endpoint_type();
+ }
+
+ if (impl.socket_.have_remote_endpoint())
+ {
+ // Check if socket is still connected.
+ DWORD connect_time = 0;
+ size_t connect_time_len = sizeof(connect_time);
+ if (socket_ops::getsockopt(impl.socket_, SOL_SOCKET, SO_CONNECT_TIME,
+ &connect_time, &connect_time_len, ec) == socket_error_retval)
+ {
+ return endpoint_type();
+ }
+ if (connect_time == 0xFFFFFFFF)
+ {
+ ec = boost::asio::error::not_connected;
+ return endpoint_type();
+ }
+
+ ec = boost::system::error_code();
+ return impl.socket_.remote_endpoint();
+ }
+ else
+ {
+ endpoint_type endpoint;
+ std::size_t addr_len = endpoint.capacity();
+ if (socket_ops::getpeername(impl.socket_, endpoint.data(), &addr_len, ec))
+ return endpoint_type();
+ endpoint.resize(addr_len);
+ return endpoint;
+ }
+ }
+
+ /// Disable sends or receives on the socket.
+ boost::system::error_code shutdown(implementation_type& impl,
+ socket_base::shutdown_type what, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ socket_ops::shutdown(impl.socket_, what, ec);
+ return ec;
+ }
+
+ // Send the given data to the peer. Returns the number of bytes sent.
+ template <typename ConstBufferSequence>
+ size_t send(implementation_type& impl, const ConstBufferSequence& buffers,
+ socket_base::message_flags flags, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename ConstBufferSequence::const_iterator iter = buffers.begin();
+ typename ConstBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ size_t total_buffer_size = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = const_cast<char*>(
+ boost::asio::buffer_cast<const char*>(buffer));
+ total_buffer_size += boost::asio::buffer_size(buffer);
+ }
+
+ // A request to receive 0 bytes on a stream socket is a no-op.
+ if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
+ {
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ // Send the data.
+ DWORD bytes_transferred = 0;
+ int result = ::WSASend(impl.socket_, bufs,
+ i, &bytes_transferred, flags, 0, 0);
+ if (result != 0)
+ {
+ DWORD last_error = ::WSAGetLastError();
+ if (last_error == ERROR_NETNAME_DELETED)
+ last_error = WSAECONNRESET;
+ else if (last_error == ERROR_PORT_UNREACHABLE)
+ last_error = WSAECONNREFUSED;
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ return 0;
+ }
+
+ ec = boost::system::error_code();
+ return bytes_transferred;
+ }
+
+ // Wait until data can be sent without blocking.
+ size_t send(implementation_type& impl, const null_buffers&,
+ socket_base::message_flags, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Wait for socket to become ready.
+ socket_ops::poll_write(impl.socket_, ec);
+
+ return 0;
+ }
+
+ template <typename ConstBufferSequence, typename Handler>
+ class send_operation
+ : public operation
+ {
+ public:
+ send_operation(win_iocp_io_service& io_service,
+ weak_cancel_token_type cancel_token,
+ const ConstBufferSequence& buffers, Handler handler)
+ : operation(io_service,
+ &send_operation<ConstBufferSequence, Handler>::do_completion_impl,
+ &send_operation<ConstBufferSequence, Handler>::destroy_impl),
+ work_(io_service.get_io_service()),
+ cancel_token_(cancel_token),
+ buffers_(buffers),
+ handler_(handler)
+ {
+ }
+
+ private:
+ static void do_completion_impl(operation* op,
+ DWORD last_error, size_t bytes_transferred)
+ {
+ // Take ownership of the operation object.
+ typedef send_operation<ConstBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+ // Check whether buffers are still valid.
+ typename ConstBufferSequence::const_iterator iter
+ = handler_op->buffers_.begin();
+ typename ConstBufferSequence::const_iterator end
+ = handler_op->buffers_.end();
+ while (iter != end)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ boost::asio::buffer_cast<const char*>(buffer);
+ ++iter;
+ }
+#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+
+ // Map non-portable errors to their portable counterparts.
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (handler_op->cancel_token_.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made.
+ Handler handler(handler_op->handler_);
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+
+ // Call the handler.
+ boost_asio_handler_invoke_helpers::invoke(
+ detail::bind_handler(handler, ec, bytes_transferred), &handler);
+ }
+
+ static void destroy_impl(operation* op)
+ {
+ // Take ownership of the operation object.
+ typedef send_operation<ConstBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // 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.
+ Handler handler(handler_op->handler_);
+ (void)handler;
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+ }
+
+ boost::asio::io_service::work work_;
+ weak_cancel_token_type cancel_token_;
+ ConstBufferSequence buffers_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous send. The data being sent must be valid for the
+ // lifetime of the asynchronous operation.
+ template <typename ConstBufferSequence, typename Handler>
+ void async_send(implementation_type& impl, const ConstBufferSequence& buffers,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef send_operation<ConstBufferSequence, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_,
+ impl.cancel_token_, buffers, handler);
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename ConstBufferSequence::const_iterator iter = buffers.begin();
+ typename ConstBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ size_t total_buffer_size = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = const_cast<char*>(
+ boost::asio::buffer_cast<const char*>(buffer));
+ total_buffer_size += boost::asio::buffer_size(buffer);
+ }
+
+ // A request to receive 0 bytes on a stream socket is a no-op.
+ if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code error;
+ iocp_service_.post(bind_handler(handler, error, 0));
+ return;
+ }
+
+ // Send the data.
+ DWORD bytes_transferred = 0;
+ int result = ::WSASend(impl.socket_, bufs, i,
+ &bytes_transferred, flags, ptr.get(), 0);
+ DWORD last_error = ::WSAGetLastError();
+
+ // Check if the operation completed immediately.
+ if (result != 0 && last_error != WSA_IO_PENDING)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+
+ template <typename Handler>
+ class null_buffers_operation
+ {
+ public:
+ null_buffers_operation(boost::asio::io_service& io_service, Handler handler)
+ : work_(io_service),
+ handler_(handler)
+ {
+ }
+
+ bool perform(boost::system::error_code&,
+ std::size_t& bytes_transferred)
+ {
+ bytes_transferred = 0;
+ return true;
+ }
+
+ void complete(const boost::system::error_code& ec,
+ std::size_t bytes_transferred)
+ {
+ work_.get_io_service().post(bind_handler(
+ handler_, ec, bytes_transferred));
+ }
+
+ private:
+ boost::asio::io_service::work work_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous wait until data can be sent without blocking.
+ template <typename Handler>
+ void async_send(implementation_type& impl, const null_buffers&,
+ socket_base::message_flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ }
+ else
+ {
+ // Check if the reactor was already obtained from the io_service.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (!reactor)
+ {
+ reactor = &(boost::asio::use_service<reactor_type>(
+ this->get_io_service()));
+ interlocked_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), reactor);
+ }
+
+ reactor->start_write_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler),
+ false);
+ }
+ }
+
+ // Send a datagram to the specified endpoint. Returns the number of bytes
+ // sent.
+ template <typename ConstBufferSequence>
+ size_t send_to(implementation_type& impl, const ConstBufferSequence& buffers,
+ const endpoint_type& destination, socket_base::message_flags flags,
+ boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename ConstBufferSequence::const_iterator iter = buffers.begin();
+ typename ConstBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = const_cast<char*>(
+ boost::asio::buffer_cast<const char*>(buffer));
+ }
+
+ // Send the data.
+ DWORD bytes_transferred = 0;
+ int result = ::WSASendTo(impl.socket_, bufs, i, &bytes_transferred,
+ flags, destination.data(), static_cast<int>(destination.size()), 0, 0);
+ if (result != 0)
+ {
+ DWORD last_error = ::WSAGetLastError();
+ if (last_error == ERROR_PORT_UNREACHABLE)
+ last_error = WSAECONNREFUSED;
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ return 0;
+ }
+
+ ec = boost::system::error_code();
+ return bytes_transferred;
+ }
+
+ // Wait until data can be sent without blocking.
+ size_t send_to(implementation_type& impl, const null_buffers&,
+ socket_base::message_flags, const endpoint_type&,
+ boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Wait for socket to become ready.
+ socket_ops::poll_write(impl.socket_, ec);
+
+ return 0;
+ }
+
+ template <typename ConstBufferSequence, typename Handler>
+ class send_to_operation
+ : public operation
+ {
+ public:
+ send_to_operation(win_iocp_io_service& io_service,
+ const ConstBufferSequence& buffers, Handler handler)
+ : operation(io_service,
+ &send_to_operation<ConstBufferSequence, Handler>::do_completion_impl,
+ &send_to_operation<ConstBufferSequence, Handler>::destroy_impl),
+ work_(io_service.get_io_service()),
+ buffers_(buffers),
+ handler_(handler)
+ {
+ }
+
+ private:
+ static void do_completion_impl(operation* op,
+ DWORD last_error, size_t bytes_transferred)
+ {
+ // Take ownership of the operation object.
+ typedef send_to_operation<ConstBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+ // Check whether buffers are still valid.
+ typename ConstBufferSequence::const_iterator iter
+ = handler_op->buffers_.begin();
+ typename ConstBufferSequence::const_iterator end
+ = handler_op->buffers_.end();
+ while (iter != end)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ boost::asio::buffer_cast<const char*>(buffer);
+ ++iter;
+ }
+#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+
+ // Map non-portable errors to their portable counterparts.
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made.
+ Handler handler(handler_op->handler_);
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+
+ // Call the handler.
+ boost_asio_handler_invoke_helpers::invoke(
+ detail::bind_handler(handler, ec, bytes_transferred), &handler);
+ }
+
+ static void destroy_impl(operation* op)
+ {
+ // Take ownership of the operation object.
+ typedef send_to_operation<ConstBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // 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.
+ Handler handler(handler_op->handler_);
+ (void)handler;
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+ }
+
+ boost::asio::io_service::work work_;
+ ConstBufferSequence buffers_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous send. The data being sent must be valid for the
+ // lifetime of the asynchronous operation.
+ template <typename ConstBufferSequence, typename Handler>
+ void async_send_to(implementation_type& impl,
+ const ConstBufferSequence& buffers, const endpoint_type& destination,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef send_to_operation<ConstBufferSequence, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ handler_ptr<alloc_traits> ptr(raw_ptr, iocp_service_, buffers, handler);
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename ConstBufferSequence::const_iterator iter = buffers.begin();
+ typename ConstBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::const_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = const_cast<char*>(
+ boost::asio::buffer_cast<const char*>(buffer));
+ }
+
+ // Send the data.
+ DWORD bytes_transferred = 0;
+ int result = ::WSASendTo(impl.socket_, bufs, i, &bytes_transferred, flags,
+ destination.data(), static_cast<int>(destination.size()), ptr.get(), 0);
+ DWORD last_error = ::WSAGetLastError();
+
+ // Check if the operation completed immediately.
+ if (result != 0 && last_error != WSA_IO_PENDING)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+
+ // Start an asynchronous wait until data can be sent without blocking.
+ template <typename Handler>
+ void async_send_to(implementation_type& impl, const null_buffers&,
+ socket_base::message_flags, const endpoint_type&, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ }
+ else
+ {
+ // Check if the reactor was already obtained from the io_service.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (!reactor)
+ {
+ reactor = &(boost::asio::use_service<reactor_type>(
+ this->get_io_service()));
+ interlocked_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), reactor);
+ }
+
+ reactor->start_write_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler),
+ false);
+ }
+ }
+
+ // Receive some data from the peer. Returns the number of bytes received.
+ template <typename MutableBufferSequence>
+ size_t receive(implementation_type& impl,
+ const MutableBufferSequence& buffers,
+ socket_base::message_flags flags, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename MutableBufferSequence::const_iterator iter = buffers.begin();
+ typename MutableBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ size_t total_buffer_size = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = boost::asio::buffer_cast<char*>(buffer);
+ total_buffer_size += boost::asio::buffer_size(buffer);
+ }
+
+ // A request to receive 0 bytes on a stream socket is a no-op.
+ if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
+ {
+ ec = boost::system::error_code();
+ return 0;
+ }
+
+ // Receive some data.
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int result = ::WSARecv(impl.socket_, bufs, i,
+ &bytes_transferred, &recv_flags, 0, 0);
+ if (result != 0)
+ {
+ DWORD last_error = ::WSAGetLastError();
+ if (last_error == ERROR_NETNAME_DELETED)
+ last_error = WSAECONNRESET;
+ else if (last_error == ERROR_PORT_UNREACHABLE)
+ last_error = WSAECONNREFUSED;
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ return 0;
+ }
+ if (bytes_transferred == 0 && impl.protocol_.type() == SOCK_STREAM)
+ {
+ ec = boost::asio::error::eof;
+ return 0;
+ }
+
+ ec = boost::system::error_code();
+ return bytes_transferred;
+ }
+
+ // Wait until data can be received without blocking.
+ size_t receive(implementation_type& impl, const null_buffers&,
+ socket_base::message_flags, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Wait for socket to become ready.
+ socket_ops::poll_read(impl.socket_, ec);
+
+ return 0;
+ }
+
+ template <typename MutableBufferSequence, typename Handler>
+ class receive_operation
+ : public operation
+ {
+ public:
+ receive_operation(int protocol_type, win_iocp_io_service& io_service,
+ weak_cancel_token_type cancel_token,
+ const MutableBufferSequence& buffers, Handler handler)
+ : operation(io_service,
+ &receive_operation<
+ MutableBufferSequence, Handler>::do_completion_impl,
+ &receive_operation<
+ MutableBufferSequence, Handler>::destroy_impl),
+ protocol_type_(protocol_type),
+ work_(io_service.get_io_service()),
+ cancel_token_(cancel_token),
+ buffers_(buffers),
+ handler_(handler)
+ {
+ }
+
+ private:
+ static void do_completion_impl(operation* op,
+ DWORD last_error, size_t bytes_transferred)
+ {
+ // Take ownership of the operation object.
+ typedef receive_operation<MutableBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+ // Check whether buffers are still valid.
+ typename MutableBufferSequence::const_iterator iter
+ = handler_op->buffers_.begin();
+ typename MutableBufferSequence::const_iterator end
+ = handler_op->buffers_.end();
+ while (iter != end)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ boost::asio::buffer_cast<char*>(buffer);
+ ++iter;
+ }
+#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+
+ // Map non-portable errors to their portable counterparts.
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ if (ec.value() == ERROR_NETNAME_DELETED)
+ {
+ if (handler_op->cancel_token_.expired())
+ ec = boost::asio::error::operation_aborted;
+ else
+ ec = boost::asio::error::connection_reset;
+ }
+ else if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+
+ // Check for connection closed.
+ else if (!ec && bytes_transferred == 0
+ && handler_op->protocol_type_ == SOCK_STREAM
+ && !boost::is_same<MutableBufferSequence, null_buffers>::value)
+ {
+ ec = boost::asio::error::eof;
+ }
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made.
+ Handler handler(handler_op->handler_);
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+
+ // Call the handler.
+ boost_asio_handler_invoke_helpers::invoke(
+ detail::bind_handler(handler, ec, bytes_transferred), &handler);
+ }
+
+ static void destroy_impl(operation* op)
+ {
+ // Take ownership of the operation object.
+ typedef receive_operation<MutableBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // 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.
+ Handler handler(handler_op->handler_);
+ (void)handler;
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+ }
+
+ int protocol_type_;
+ boost::asio::io_service::work work_;
+ weak_cancel_token_type cancel_token_;
+ MutableBufferSequence buffers_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous receive. The buffer for the data being received
+ // must be valid for the lifetime of the asynchronous operation.
+ template <typename MutableBufferSequence, typename Handler>
+ void async_receive(implementation_type& impl,
+ const MutableBufferSequence& buffers,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef receive_operation<MutableBufferSequence, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ int protocol_type = impl.protocol_.type();
+ handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
+ iocp_service_, impl.cancel_token_, buffers, handler);
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename MutableBufferSequence::const_iterator iter = buffers.begin();
+ typename MutableBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ size_t total_buffer_size = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = boost::asio::buffer_cast<char*>(buffer);
+ total_buffer_size += boost::asio::buffer_size(buffer);
+ }
+
+ // A request to receive 0 bytes on a stream socket is a no-op.
+ if (impl.protocol_.type() == SOCK_STREAM && total_buffer_size == 0)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code error;
+ iocp_service_.post(bind_handler(handler, error, 0));
+ return;
+ }
+
+ // Receive some data.
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int result = ::WSARecv(impl.socket_, bufs, i,
+ &bytes_transferred, &recv_flags, ptr.get(), 0);
+ DWORD last_error = ::WSAGetLastError();
+ if (result != 0 && last_error != WSA_IO_PENDING)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+
+ // Wait until data can be received without blocking.
+ template <typename Handler>
+ void async_receive(implementation_type& impl, const null_buffers& buffers,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ }
+ else if (impl.protocol_.type() == SOCK_STREAM)
+ {
+ // For stream sockets on Windows, we may issue a 0-byte overlapped
+ // WSARecv to wait until there is data available on the socket.
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef receive_operation<null_buffers, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ int protocol_type = impl.protocol_.type();
+ handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
+ iocp_service_, impl.cancel_token_, buffers, handler);
+
+ // Issue a receive operation with an empty buffer.
+ ::WSABUF buf = { 0, 0 };
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int result = ::WSARecv(impl.socket_, &buf, 1,
+ &bytes_transferred, &recv_flags, ptr.get(), 0);
+ DWORD last_error = ::WSAGetLastError();
+ if (result != 0 && last_error != WSA_IO_PENDING)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+ else
+ {
+ // Check if the reactor was already obtained from the io_service.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (!reactor)
+ {
+ reactor = &(boost::asio::use_service<reactor_type>(
+ this->get_io_service()));
+ interlocked_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), reactor);
+ }
+
+ if (flags & socket_base::message_out_of_band)
+ {
+ reactor->start_except_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler));
+ }
+ else
+ {
+ reactor->start_read_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler),
+ false);
+ }
+ }
+ }
+
+ // Receive a datagram with the endpoint of the sender. Returns the number of
+ // bytes received.
+ template <typename MutableBufferSequence>
+ size_t receive_from(implementation_type& impl,
+ const MutableBufferSequence& buffers,
+ endpoint_type& sender_endpoint, socket_base::message_flags flags,
+ boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename MutableBufferSequence::const_iterator iter = buffers.begin();
+ typename MutableBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = boost::asio::buffer_cast<char*>(buffer);
+ }
+
+ // Receive some data.
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int endpoint_size = static_cast<int>(sender_endpoint.capacity());
+ int result = ::WSARecvFrom(impl.socket_, bufs, i, &bytes_transferred,
+ &recv_flags, sender_endpoint.data(), &endpoint_size, 0, 0);
+ if (result != 0)
+ {
+ DWORD last_error = ::WSAGetLastError();
+ if (last_error == ERROR_PORT_UNREACHABLE)
+ last_error = WSAECONNREFUSED;
+ ec = boost::system::error_code(last_error,
+ boost::asio::error::get_system_category());
+ return 0;
+ }
+ if (bytes_transferred == 0 && impl.protocol_.type() == SOCK_STREAM)
+ {
+ ec = boost::asio::error::eof;
+ return 0;
+ }
+
+ sender_endpoint.resize(static_cast<std::size_t>(endpoint_size));
+
+ ec = boost::system::error_code();
+ return bytes_transferred;
+ }
+
+ // Wait until data can be received without blocking.
+ size_t receive_from(implementation_type& impl,
+ const null_buffers&, endpoint_type& sender_endpoint,
+ socket_base::message_flags, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return 0;
+ }
+
+ // Wait for socket to become ready.
+ socket_ops::poll_read(impl.socket_, ec);
+
+ // Reset endpoint since it can be given no sensible value at this time.
+ sender_endpoint = endpoint_type();
+
+ return 0;
+ }
+
+ template <typename MutableBufferSequence, typename Handler>
+ class receive_from_operation
+ : public operation
+ {
+ public:
+ receive_from_operation(int protocol_type, win_iocp_io_service& io_service,
+ endpoint_type& endpoint, const MutableBufferSequence& buffers,
+ Handler handler)
+ : operation(io_service,
+ &receive_from_operation<
+ MutableBufferSequence, Handler>::do_completion_impl,
+ &receive_from_operation<
+ MutableBufferSequence, Handler>::destroy_impl),
+ protocol_type_(protocol_type),
+ endpoint_(endpoint),
+ endpoint_size_(static_cast<int>(endpoint.capacity())),
+ work_(io_service.get_io_service()),
+ buffers_(buffers),
+ handler_(handler)
+ {
+ }
+
+ int& endpoint_size()
+ {
+ return endpoint_size_;
+ }
+
+ private:
+ static void do_completion_impl(operation* op,
+ DWORD last_error, size_t bytes_transferred)
+ {
+ // Take ownership of the operation object.
+ typedef receive_from_operation<MutableBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+ // Check whether buffers are still valid.
+ typename MutableBufferSequence::const_iterator iter
+ = handler_op->buffers_.begin();
+ typename MutableBufferSequence::const_iterator end
+ = handler_op->buffers_.end();
+ while (iter != end)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ boost::asio::buffer_cast<char*>(buffer);
+ ++iter;
+ }
+#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
+
+ // Map non-portable errors to their portable counterparts.
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ if (ec.value() == ERROR_PORT_UNREACHABLE)
+ {
+ ec = boost::asio::error::connection_refused;
+ }
+
+ // Check for connection closed.
+ if (!ec && bytes_transferred == 0
+ && handler_op->protocol_type_ == SOCK_STREAM)
+ {
+ ec = boost::asio::error::eof;
+ }
+
+ // Record the size of the endpoint returned by the operation.
+ handler_op->endpoint_.resize(handler_op->endpoint_size_);
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made.
+ Handler handler(handler_op->handler_);
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+
+ // Call the handler.
+ boost_asio_handler_invoke_helpers::invoke(
+ detail::bind_handler(handler, ec, bytes_transferred), &handler);
+ }
+
+ static void destroy_impl(operation* op)
+ {
+ // Take ownership of the operation object.
+ typedef receive_from_operation<MutableBufferSequence, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // 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.
+ Handler handler(handler_op->handler_);
+ (void)handler;
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+ }
+
+ int protocol_type_;
+ endpoint_type& endpoint_;
+ int endpoint_size_;
+ boost::asio::io_service::work work_;
+ MutableBufferSequence buffers_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous receive. The buffer for the data being received and
+ // the sender_endpoint object must both be valid for the lifetime of the
+ // asynchronous operation.
+ template <typename MutableBufferSequence, typename Handler>
+ void async_receive_from(implementation_type& impl,
+ const MutableBufferSequence& buffers, endpoint_type& sender_endp,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef receive_from_operation<MutableBufferSequence, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ int protocol_type = impl.protocol_.type();
+ handler_ptr<alloc_traits> ptr(raw_ptr, protocol_type,
+ iocp_service_, sender_endp, buffers, handler);
+
+ // Copy buffers into WSABUF array.
+ ::WSABUF bufs[max_buffers];
+ typename MutableBufferSequence::const_iterator iter = buffers.begin();
+ typename MutableBufferSequence::const_iterator end = buffers.end();
+ DWORD i = 0;
+ for (; iter != end && i < max_buffers; ++iter, ++i)
+ {
+ boost::asio::mutable_buffer buffer(*iter);
+ bufs[i].len = static_cast<u_long>(boost::asio::buffer_size(buffer));
+ bufs[i].buf = boost::asio::buffer_cast<char*>(buffer);
+ }
+
+ // Receive some data.
+ DWORD bytes_transferred = 0;
+ DWORD recv_flags = flags;
+ int result = ::WSARecvFrom(impl.socket_, bufs, i, &bytes_transferred,
+ &recv_flags, sender_endp.data(), &ptr.get()->endpoint_size(),
+ ptr.get(), 0);
+ DWORD last_error = ::WSAGetLastError();
+ if (result != 0 && last_error != WSA_IO_PENDING)
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec, bytes_transferred));
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+
+ // Wait until data can be received without blocking.
+ template <typename Handler>
+ void async_receive_from(implementation_type& impl,
+ const null_buffers&, endpoint_type& sender_endpoint,
+ socket_base::message_flags flags, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor, 0));
+ }
+ else
+ {
+ // Check if the reactor was already obtained from the io_service.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (!reactor)
+ {
+ reactor = &(boost::asio::use_service<reactor_type>(
+ this->get_io_service()));
+ interlocked_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), reactor);
+ }
+
+ // Reset endpoint since it can be given no sensible value at this time.
+ sender_endpoint = endpoint_type();
+
+ if (flags & socket_base::message_out_of_band)
+ {
+ reactor->start_except_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler));
+ }
+ else
+ {
+ reactor->start_read_op(impl.socket_, impl.reactor_data_,
+ null_buffers_operation<Handler>(this->get_io_service(), handler),
+ false);
+ }
+ }
+ }
+
+ // Accept a new connection.
+ template <typename Socket>
+ boost::system::error_code accept(implementation_type& impl, Socket& peer,
+ endpoint_type* peer_endpoint, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ // We cannot accept a socket that is already open.
+ if (peer.is_open())
+ {
+ ec = boost::asio::error::already_open;
+ return ec;
+ }
+
+ for (;;)
+ {
+ socket_holder new_socket;
+ std::size_t addr_len = 0;
+ if (peer_endpoint)
+ {
+ addr_len = peer_endpoint->capacity();
+ new_socket.reset(socket_ops::accept(impl.socket_,
+ peer_endpoint->data(), &addr_len, ec));
+ }
+ else
+ {
+ new_socket.reset(socket_ops::accept(impl.socket_, 0, 0, ec));
+ }
+
+ if (ec)
+ {
+ if (ec == boost::asio::error::connection_aborted
+ && !(impl.flags_ & implementation_type::enable_connection_aborted))
+ {
+ // Retry accept operation.
+ continue;
+ }
+ else
+ {
+ return ec;
+ }
+ }
+
+ if (peer_endpoint)
+ peer_endpoint->resize(addr_len);
+
+ peer.assign(impl.protocol_, new_socket.get(), ec);
+ if (!ec)
+ new_socket.release();
+ return ec;
+ }
+ }
+
+ template <typename Socket, typename Handler>
+ class accept_operation
+ : public operation
+ {
+ public:
+ accept_operation(win_iocp_io_service& io_service,
+ socket_type socket, socket_type new_socket, Socket& peer,
+ const protocol_type& protocol, endpoint_type* peer_endpoint,
+ bool enable_connection_aborted, Handler handler)
+ : operation(io_service,
+ &accept_operation<Socket, Handler>::do_completion_impl,
+ &accept_operation<Socket, Handler>::destroy_impl),
+ io_service_(io_service),
+ socket_(socket),
+ new_socket_(new_socket),
+ peer_(peer),
+ protocol_(protocol),
+ peer_endpoint_(peer_endpoint),
+ work_(io_service.get_io_service()),
+ enable_connection_aborted_(enable_connection_aborted),
+ handler_(handler)
+ {
+ }
+
+ socket_type new_socket()
+ {
+ return new_socket_.get();
+ }
+
+ void* output_buffer()
+ {
+ return output_buffer_;
+ }
+
+ DWORD address_length()
+ {
+ return sizeof(sockaddr_storage_type) + 16;
+ }
+
+ private:
+ static void do_completion_impl(operation* op, DWORD last_error, size_t)
+ {
+ // Take ownership of the operation object.
+ typedef accept_operation<Socket, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // Map Windows error ERROR_NETNAME_DELETED to connection_aborted.
+ if (last_error == ERROR_NETNAME_DELETED)
+ {
+ last_error = WSAECONNABORTED;
+ }
+
+ // Restart the accept operation if we got the connection_aborted error
+ // and the enable_connection_aborted socket option is not set.
+ if (last_error == WSAECONNABORTED
+ && !ptr.get()->enable_connection_aborted_)
+ {
+ // Reset OVERLAPPED structure.
+ ptr.get()->Internal = 0;
+ ptr.get()->InternalHigh = 0;
+ ptr.get()->Offset = 0;
+ ptr.get()->OffsetHigh = 0;
+ ptr.get()->hEvent = 0;
+
+ // Create a new socket for the next connection, since the AcceptEx call
+ // fails with WSAEINVAL if we try to reuse the same socket.
+ boost::system::error_code ec;
+ ptr.get()->new_socket_.reset();
+ ptr.get()->new_socket_.reset(socket_ops::socket(
+ ptr.get()->protocol_.family(), ptr.get()->protocol_.type(),
+ ptr.get()->protocol_.protocol(), ec));
+ if (ptr.get()->new_socket() != invalid_socket)
+ {
+ // Accept a connection.
+ DWORD bytes_read = 0;
+ BOOL result = ::AcceptEx(ptr.get()->socket_, ptr.get()->new_socket(),
+ ptr.get()->output_buffer(), 0, ptr.get()->address_length(),
+ ptr.get()->address_length(), &bytes_read, ptr.get());
+ last_error = ::WSAGetLastError();
+
+ // Check if the operation completed immediately.
+ if (!result && last_error != WSA_IO_PENDING)
+ {
+ if (last_error == ERROR_NETNAME_DELETED
+ || last_error == WSAECONNABORTED)
+ {
+ // Post this handler so that operation will be restarted again.
+ ptr.get()->io_service_.post_completion(ptr.get(), last_error, 0);
+ ptr.release();
+ return;
+ }
+ else
+ {
+ // Operation already complete. Continue with rest of this handler.
+ }
+ }
+ else
+ {
+ // Asynchronous operation has been successfully restarted.
+ ptr.release();
+ return;
+ }
+ }
+ }
+
+ // Get the address of the peer.
+ endpoint_type peer_endpoint;
+ if (last_error == 0)
+ {
+ LPSOCKADDR local_addr = 0;
+ int local_addr_length = 0;
+ LPSOCKADDR remote_addr = 0;
+ int remote_addr_length = 0;
+ GetAcceptExSockaddrs(handler_op->output_buffer(), 0,
+ handler_op->address_length(), handler_op->address_length(),
+ &local_addr, &local_addr_length, &remote_addr, &remote_addr_length);
+ if (static_cast<std::size_t>(remote_addr_length)
+ > peer_endpoint.capacity())
+ {
+ last_error = WSAEINVAL;
+ }
+ else
+ {
+ using namespace std; // For memcpy.
+ memcpy(peer_endpoint.data(), remote_addr, remote_addr_length);
+ peer_endpoint.resize(static_cast<std::size_t>(remote_addr_length));
+ }
+ }
+
+ // Need to set the SO_UPDATE_ACCEPT_CONTEXT option so that getsockname
+ // and getpeername will work on the accepted socket.
+ if (last_error == 0)
+ {
+ SOCKET update_ctx_param = handler_op->socket_;
+ boost::system::error_code ec;
+ if (socket_ops::setsockopt(handler_op->new_socket_.get(),
+ SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT,
+ &update_ctx_param, sizeof(SOCKET), ec) != 0)
+ {
+ last_error = ec.value();
+ }
+ }
+
+ // If the socket was successfully accepted, transfer ownership of the
+ // socket to the peer object.
+ if (last_error == 0)
+ {
+ boost::system::error_code ec;
+ handler_op->peer_.assign(handler_op->protocol_,
+ native_type(handler_op->new_socket_.get(), peer_endpoint), ec);
+ if (ec)
+ last_error = ec.value();
+ else
+ handler_op->new_socket_.release();
+ }
+
+ // Pass endpoint back to caller.
+ if (handler_op->peer_endpoint_)
+ *handler_op->peer_endpoint_ = peer_endpoint;
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made.
+ Handler handler(handler_op->handler_);
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+
+ // Call the handler.
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ boost_asio_handler_invoke_helpers::invoke(
+ detail::bind_handler(handler, ec), &handler);
+ }
+
+ static void destroy_impl(operation* op)
+ {
+ // Take ownership of the operation object.
+ typedef accept_operation<Socket, Handler> op_type;
+ op_type* handler_op(static_cast<op_type*>(op));
+ typedef handler_alloc_traits<Handler, op_type> alloc_traits;
+ handler_ptr<alloc_traits> ptr(handler_op->handler_, handler_op);
+
+ // 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.
+ Handler handler(handler_op->handler_);
+ (void)handler;
+
+ // Free the memory associated with the handler.
+ ptr.reset();
+ }
+
+ win_iocp_io_service& io_service_;
+ socket_type socket_;
+ socket_holder new_socket_;
+ Socket& peer_;
+ protocol_type protocol_;
+ endpoint_type* peer_endpoint_;
+ boost::asio::io_service::work work_;
+ unsigned char output_buffer_[(sizeof(sockaddr_storage_type) + 16) * 2];
+ bool enable_connection_aborted_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous accept. The peer and peer_endpoint objects
+ // must be valid until the accept's handler is invoked.
+ template <typename Socket, typename Handler>
+ void async_accept(implementation_type& impl, Socket& peer,
+ endpoint_type* peer_endpoint, Handler handler)
+ {
+ // Check whether acceptor has been initialised.
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor));
+ return;
+ }
+
+ // Check that peer socket has not already been opened.
+ if (peer.is_open())
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::already_open));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Create a new socket for the connection.
+ boost::system::error_code ec;
+ socket_holder sock(socket_ops::socket(impl.protocol_.family(),
+ impl.protocol_.type(), impl.protocol_.protocol(), ec));
+ if (sock.get() == invalid_socket)
+ {
+ this->get_io_service().post(bind_handler(handler, ec));
+ return;
+ }
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef accept_operation<Socket, Handler> value_type;
+ typedef handler_alloc_traits<Handler, value_type> alloc_traits;
+ raw_handler_ptr<alloc_traits> raw_ptr(handler);
+ socket_type new_socket = sock.get();
+ bool enable_connection_aborted =
+ (impl.flags_ & implementation_type::enable_connection_aborted);
+ handler_ptr<alloc_traits> ptr(raw_ptr,
+ iocp_service_, impl.socket_, new_socket, peer, impl.protocol_,
+ peer_endpoint, enable_connection_aborted, handler);
+ sock.release();
+
+ // Accept a connection.
+ DWORD bytes_read = 0;
+ BOOL result = ::AcceptEx(impl.socket_, ptr.get()->new_socket(),
+ ptr.get()->output_buffer(), 0, ptr.get()->address_length(),
+ ptr.get()->address_length(), &bytes_read, ptr.get());
+ DWORD last_error = ::WSAGetLastError();
+
+ // Check if the operation completed immediately.
+ if (!result && last_error != WSA_IO_PENDING)
+ {
+ if (!enable_connection_aborted
+ && (last_error == ERROR_NETNAME_DELETED
+ || last_error == WSAECONNABORTED))
+ {
+ // Post handler so that operation will be restarted again. We do not
+ // perform the AcceptEx again here to avoid the possibility of starving
+ // other handlers.
+ iocp_service_.post_completion(ptr.get(), last_error, 0);
+ ptr.release();
+ }
+ else
+ {
+ boost::asio::io_service::work work(this->get_io_service());
+ ptr.reset();
+ boost::system::error_code ec(last_error,
+ boost::asio::error::get_system_category());
+ iocp_service_.post(bind_handler(handler, ec));
+ }
+ }
+ else
+ {
+ ptr.release();
+ }
+ }
+
+ // Connect the socket to the specified endpoint.
+ boost::system::error_code connect(implementation_type& impl,
+ const endpoint_type& peer_endpoint, boost::system::error_code& ec)
+ {
+ if (!is_open(impl))
+ {
+ ec = boost::asio::error::bad_descriptor;
+ return ec;
+ }
+
+ // Perform the connect operation.
+ socket_ops::connect(impl.socket_,
+ peer_endpoint.data(), peer_endpoint.size(), ec);
+ return ec;
+ }
+
+ template <typename Handler>
+ class connect_operation
+ {
+ public:
+ connect_operation(socket_type socket, bool user_set_non_blocking,
+ boost::asio::io_service& io_service, Handler handler)
+ : socket_(socket),
+ user_set_non_blocking_(user_set_non_blocking),
+ io_service_(io_service),
+ work_(io_service),
+ handler_(handler)
+ {
+ }
+
+ bool perform(boost::system::error_code& ec,
+ std::size_t& bytes_transferred)
+ {
+ bytes_transferred = 0;
+
+ // Check whether the operation was successful.
+ if (ec)
+ return true;
+
+ // Get the error code from the connect operation.
+ int connect_error = 0;
+ size_t connect_error_len = sizeof(connect_error);
+ if (socket_ops::getsockopt(socket_, SOL_SOCKET, SO_ERROR,
+ &connect_error, &connect_error_len, ec) == socket_error_retval)
+ return true;
+
+ // If connection failed then post the handler with the error code.
+ if (connect_error)
+ {
+ ec = boost::system::error_code(connect_error,
+ boost::asio::error::get_system_category());
+ return true;
+ }
+
+ // Revert socket to blocking mode unless the user requested otherwise.
+ if (!user_set_non_blocking_)
+ {
+ ioctl_arg_type non_blocking = 0;
+ if (socket_ops::ioctl(socket_, FIONBIO, &non_blocking, ec))
+ return true;
+ }
+
+ // Post the result of the successful connection operation.
+ ec = boost::system::error_code();
+ return true;
+ }
+
+ void complete(const boost::system::error_code& ec, std::size_t)
+ {
+ io_service_.post(bind_handler(handler_, ec));
+ }
+
+ private:
+ socket_type socket_;
+ bool user_set_non_blocking_;
+ boost::asio::io_service& io_service_;
+ boost::asio::io_service::work work_;
+ Handler handler_;
+ };
+
+ // Start an asynchronous connect.
+ template <typename Handler>
+ void async_connect(implementation_type& impl,
+ const endpoint_type& peer_endpoint, Handler handler)
+ {
+ if (!is_open(impl))
+ {
+ this->get_io_service().post(bind_handler(handler,
+ boost::asio::error::bad_descriptor));
+ return;
+ }
+
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ // Update the ID of the thread from which cancellation is safe.
+ if (impl.safe_cancellation_thread_id_ == 0)
+ impl.safe_cancellation_thread_id_ = ::GetCurrentThreadId();
+ else if (impl.safe_cancellation_thread_id_ != ::GetCurrentThreadId())
+ impl.safe_cancellation_thread_id_ = ~DWORD(0);
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+
+ // Check if the reactor was already obtained from the io_service.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (!reactor)
+ {
+ reactor = &(boost::asio::use_service<reactor_type>(
+ this->get_io_service()));
+ interlocked_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), reactor);
+ }
+
+ // Mark the socket as non-blocking so that the connection will take place
+ // asynchronously.
+ ioctl_arg_type non_blocking = 1;
+ boost::system::error_code ec;
+ if (socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec))
+ {
+ this->get_io_service().post(bind_handler(handler, ec));
+ return;
+ }
+
+ // Start the connect operation.
+ if (socket_ops::connect(impl.socket_, peer_endpoint.data(),
+ peer_endpoint.size(), ec) == 0)
+ {
+ // Revert socket to blocking mode unless the user requested otherwise.
+ if (!(impl.flags_ & implementation_type::user_set_non_blocking))
+ {
+ non_blocking = 0;
+ socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ec);
+ }
+
+ // The connect operation has finished successfully so we need to post the
+ // handler immediately.
+ this->get_io_service().post(bind_handler(handler, ec));
+ }
+ else if (ec == boost::asio::error::in_progress
+ || ec == boost::asio::error::would_block)
+ {
+ // The connection is happening in the background, and we need to wait
+ // until the socket becomes writeable.
+ boost::shared_ptr<bool> completed(new bool(false));
+ reactor->start_connect_op(impl.socket_, impl.reactor_data_,
+ connect_operation<Handler>(
+ impl.socket_,
+ (impl.flags_ & implementation_type::user_set_non_blocking) != 0,
+ this->get_io_service(), handler));
+ }
+ else
+ {
+ // Revert socket to blocking mode unless the user requested otherwise.
+ if (!(impl.flags_ & implementation_type::user_set_non_blocking))
+ {
+ non_blocking = 0;
+ boost::system::error_code ignored_ec;
+ socket_ops::ioctl(impl.socket_, FIONBIO, &non_blocking, ignored_ec);
+ }
+
+ // The connect operation has failed, so post the handler immediately.
+ this->get_io_service().post(bind_handler(handler, ec));
+ }
+ }
+
+private:
+ // Helper function to close a socket when the associated object is being
+ // destroyed.
+ void close_for_destruction(implementation_type& impl)
+ {
+ if (is_open(impl))
+ {
+ // Check if the reactor was created, in which case we need to close the
+ // socket on the reactor as well to cancel any operations that might be
+ // running there.
+ reactor_type* reactor = static_cast<reactor_type*>(
+ interlocked_compare_exchange_pointer(
+ reinterpret_cast<void**>(&reactor_), 0, 0));
+ if (reactor)
+ reactor->close_descriptor(impl.socket_, impl.reactor_data_);
+
+ // The socket destructor must not block. If the user has changed the
+ // linger option to block in the foreground, we will change it back to the
+ // default so that the closure is performed in the background.
+ if (impl.flags_ & implementation_type::close_might_block)
+ {
+ ::linger opt;
+ opt.l_onoff = 0;
+ opt.l_linger = 0;
+ boost::system::error_code ignored_ec;
+ socket_ops::setsockopt(impl.socket_,
+ SOL_SOCKET, SO_LINGER, &opt, sizeof(opt), ignored_ec);
+ }
+
+ boost::system::error_code ignored_ec;
+ socket_ops::close(impl.socket_, ignored_ec);
+ impl.socket_ = invalid_socket;
+ impl.flags_ = 0;
+ impl.cancel_token_.reset();
+#if defined(BOOST_ASIO_ENABLE_CANCELIO)
+ impl.safe_cancellation_thread_id_ = 0;
+#endif // defined(BOOST_ASIO_ENABLE_CANCELIO)
+ }
+ }
+
+ // Helper function to emulate InterlockedCompareExchangePointer functionality
+ // for:
+ // - very old Platform SDKs; and
+ // - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
+ void* interlocked_compare_exchange_pointer(void** dest, void* exch, void* cmp)
+ {
+#if defined(_M_IX86)
+ return reinterpret_cast<void*>(InterlockedCompareExchange(
+ reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(exch),
+ reinterpret_cast<LONG>(cmp)));
+#else
+ return InterlockedCompareExchangePointer(dest, exch, cmp);
+#endif
+ }
+
+ // Helper function to emulate InterlockedExchangePointer functionality for:
+ // - very old Platform SDKs; and
+ // - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
+ void* interlocked_exchange_pointer(void** dest, void* val)
+ {
+#if defined(_M_IX86)
+ return reinterpret_cast<void*>(InterlockedExchange(
+ reinterpret_cast<PLONG>(dest), reinterpret_cast<LONG>(val)));
+#else
+ return InterlockedExchangePointer(dest, val);
+#endif
+ }
+
+ // The IOCP service used for running asynchronous operations and dispatching
+ // handlers.
+ win_iocp_io_service& iocp_service_;
+
+ // The reactor used for performing connect operations. This object is created
+ // only if needed.
+ reactor_type* reactor_;
+
+ // Mutex to protect access to the linked list of implementations.
+ boost::asio::detail::mutex mutex_;
+
+ // The head of a linked list of all implementations.
+ implementation_type* impl_list_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#endif // defined(BOOST_ASIO_HAS_IOCP)
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_HPP