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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 new file mode 100644 index 0000000..5192612 --- /dev/null +++ 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 |