| // |
| // 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 |
