FM / detail

/usr/include/boost/asio/detail

Name	Size	Mode	Actions
impl/	-	0755	rm
array.hpp	1001	0644	edit dl rm
array_fwd.hpp	950	0644	edit dl rm
assert.hpp	968	0644	edit dl rm
atomic_count.hpp	1955	0644	edit dl rm
base_from_completion_cond.hpp	1795	0644	edit dl rm
bind_handler.hpp	28936	0644	edit dl rm
blocking_executor_op.hpp	2823	0644	edit dl rm
buffered_stream_storage.hpp	2987	0644	edit dl rm
buffer_resize_guard.hpp	1593	0644	edit dl rm
buffer_sequence_adapter.hpp	15582	0644	edit dl rm
bulk_executor_op.hpp	2785	0644	edit dl rm
call_stack.hpp	3003	0644	edit dl rm
chrono.hpp	2081	0644	edit dl rm
chrono_time_traits.hpp	4469	0644	edit dl rm
completion_handler.hpp	2832	0644	edit dl rm
concurrency_hint.hpp	4062	0644	edit dl rm
conditionally_enabled_event.hpp	3124	0644	edit dl rm
conditionally_enabled_mutex.hpp	3126	0644	edit dl rm
config.hpp	76667	0644	edit dl rm
consuming_buffers.hpp	10631	0644	edit dl rm
cstddef.hpp	816	0644	edit dl rm
cstdint.hpp	1558	0644	edit dl rm
date_time_fwd.hpp	792	0644	edit dl rm
deadline_timer_service.hpp	9241	0644	edit dl rm
dependent_type.hpp	891	0644	edit dl rm
descriptor_ops.hpp	4244	0644	edit dl rm
descriptor_read_op.hpp	4798	0644	edit dl rm
descriptor_write_op.hpp	4801	0644	edit dl rm
dev_poll_reactor.hpp	8039	0644	edit dl rm
epoll_reactor.hpp	9467	0644	edit dl rm
event.hpp	1364	0644	edit dl rm
eventfd_select_interrupter.hpp	2524	0644	edit dl rm
executor_function.hpp	4857	0644	edit dl rm
executor_op.hpp	2605	0644	edit dl rm
fd_set_adapter.hpp	1064	0644	edit dl rm
fenced_block.hpp	3066	0644	edit dl rm
functional.hpp	1014	0644	edit dl rm
future.hpp	1241	0644	edit dl rm
gcc_arm_fenced_block.hpp	2238	0644	edit dl rm
gcc_hppa_fenced_block.hpp	1560	0644	edit dl rm
gcc_sync_fenced_block.hpp	1679	0644	edit dl rm
gcc_x86_fenced_block.hpp	2460	0644	edit dl rm
global.hpp	1397	0644	edit dl rm
handler_alloc_helpers.hpp	8236	0644	edit dl rm
handler_cont_helpers.hpp	1364	0644	edit dl rm
handler_invoke_helpers.hpp	2715	0644	edit dl rm
handler_tracking.hpp	9182	0644	edit dl rm
handler_type_requirements.hpp	20351	0644	edit dl rm
handler_work.hpp	12302	0644	edit dl rm
hash_map.hpp	8343	0644	edit dl rm
io_control.hpp	1883	0644	edit dl rm
io_object_impl.hpp	5018	0644	edit dl rm
is_buffer_sequence.hpp	7953	0644	edit dl rm
is_executor.hpp	3033	0644	edit dl rm
keyword_tss_ptr.hpp	1425	0644	edit dl rm
kqueue_reactor.hpp	8277	0644	edit dl rm
limits.hpp	734	0644	edit dl rm
local_free_on_block_exit.hpp	1470	0644	edit dl rm
macos_fenced_block.hpp	1380	0644	edit dl rm
memory.hpp	2103	0644	edit dl rm
mutex.hpp	1351	0644	edit dl rm
noncopyable.hpp	1000	0644	edit dl rm
non_const_lvalue.hpp	1506	0644	edit dl rm
null_event.hpp	2197	0644	edit dl rm
null_fenced_block.hpp	1044	0644	edit dl rm
null_global.hpp	1295	0644	edit dl rm
null_mutex.hpp	1255	0644	edit dl rm
null_reactor.hpp	1563	0644	edit dl rm
null_signal_blocker.hpp	1627	0644	edit dl rm
null_socket_service.hpp	17283	0644	edit dl rm
null_static_mutex.hpp	1259	0644	edit dl rm
null_thread.hpp	1442	0644	edit dl rm
null_tss_ptr.hpp	1272	0644	edit dl rm
object_pool.hpp	3500	0644	edit dl rm
old_win_sdk_compat.hpp	4478	0644	edit dl rm
operation.hpp	963	0644	edit dl rm
op_queue.hpp	3313	0644	edit dl rm
pipe_select_interrupter.hpp	2603	0644	edit dl rm
pop_options.hpp	2877	0644	edit dl rm
posix_event.hpp	4548	0644	edit dl rm
posix_fd_set_adapter.hpp	2992	0644	edit dl rm
posix_global.hpp	1807	0644	edit dl rm
posix_mutex.hpp	1685	0644	edit dl rm
posix_signal_blocker.hpp	1975	0644	edit dl rm
posix_static_mutex.hpp	1467	0644	edit dl rm
posix_thread.hpp	2187	0644	edit dl rm
posix_tss_ptr.hpp	1800	0644	edit dl rm
push_options.hpp	4679	0644	edit dl rm
reactive_descriptor_service.hpp	14507	0644	edit dl rm
reactive_null_buffers_op.hpp	3300	0644	edit dl rm
reactive_serial_port_service.hpp	8314	0644	edit dl rm
reactive_socket_accept_op.hpp	8322	0644	edit dl rm
reactive_socket_connect_op.hpp	4010	0644	edit dl rm
reactive_socket_recvfrom_op.hpp	5660	0644	edit dl rm
reactive_socket_recvmsg_op.hpp	5012	0644	edit dl rm
reactive_socket_recv_op.hpp	5433	0644	edit dl rm
reactive_socket_sendto_op.hpp	5362	0644	edit dl rm
reactive_socket_send_op.hpp	5530	0644	edit dl rm
reactive_socket_service.hpp	18653	0644	edit dl rm
reactive_socket_service_base.hpp	19681	0644	edit dl rm
reactive_wait_op.hpp	3153	0644	edit dl rm
reactor.hpp	1003	0644	edit dl rm
reactor_fwd.hpp	1155	0644	edit dl rm
reactor_op.hpp	1763	0644	edit dl rm
reactor_op_queue.hpp	4979	0644	edit dl rm
recycling_allocator.hpp	2467	0644	edit dl rm
regex_fwd.hpp	846	0644	edit dl rm
resolver_service.hpp	4806	0644	edit dl rm
resolver_service_base.hpp	4392	0644	edit dl rm
resolve_endpoint_op.hpp	4900	0644	edit dl rm
resolve_op.hpp	1090	0644	edit dl rm
resolve_query_op.hpp	5034	0644	edit dl rm
scheduler.hpp	7609	0644	edit dl rm
scheduler_operation.hpp	1922	0644	edit dl rm
scheduler_thread_info.hpp	1079	0644	edit dl rm
scoped_lock.hpp	1942	0644	edit dl rm
scoped_ptr.hpp	1448	0644	edit dl rm
select_interrupter.hpp	1426	0644	edit dl rm
select_reactor.hpp	8813	0644	edit dl rm
service_registry.hpp	5645	0644	edit dl rm
signal_blocker.hpp	1382	0644	edit dl rm
signal_handler.hpp	2931	0644	edit dl rm
signal_init.hpp	1070	0644	edit dl rm
signal_op.hpp	1146	0644	edit dl rm
signal_set_service.hpp	7018	0644	edit dl rm
socket_holder.hpp	2148	0644	edit dl rm
socket_ops.hpp	13917	0644	edit dl rm
socket_option.hpp	6410	0644	edit dl rm
socket_select_interrupter.hpp	2620	0644	edit dl rm
socket_types.hpp	16173	0644	edit dl rm
solaris_fenced_block.hpp	1338	0644	edit dl rm
source_location.hpp	1460	0644	edit dl rm
static_mutex.hpp	1745	0644	edit dl rm
std_event.hpp	4029	0644	edit dl rm
std_fenced_block.hpp	1408	0644	edit dl rm
std_global.hpp	1568	0644	edit dl rm
std_mutex.hpp	1404	0644	edit dl rm
std_static_mutex.hpp	1586	0644	edit dl rm
std_thread.hpp	1425	0644	edit dl rm
strand_executor_service.hpp	6110	0644	edit dl rm
strand_service.hpp	4896	0644	edit dl rm
string_view.hpp	1574	0644	edit dl rm
thread.hpp	1658	0644	edit dl rm
thread_context.hpp	1135	0644	edit dl rm
thread_group.hpp	1993	0644	edit dl rm
thread_info_base.hpp	4979	0644	edit dl rm
throw_error.hpp	1377	0644	edit dl rm
throw_exception.hpp	1512	0644	edit dl rm
timer_queue.hpp	9873	0644	edit dl rm
timer_queue_base.hpp	1754	0644	edit dl rm
timer_queue_ptime.hpp	3132	0644	edit dl rm
timer_queue_set.hpp	1805	0644	edit dl rm
timer_scheduler.hpp	1157	0644	edit dl rm
timer_scheduler_fwd.hpp	1225	0644	edit dl rm
tss_ptr.hpp	1883	0644	edit dl rm
type_traits.hpp	5070	0644	edit dl rm
variadic_templates.hpp	13229	0644	edit dl rm
wait_handler.hpp	2864	0644	edit dl rm
wait_op.hpp	1021	0644	edit dl rm
winapp_thread.hpp	2740	0644	edit dl rm
wince_thread.hpp	2683	0644	edit dl rm
winrt_async_manager.hpp	9024	0644	edit dl rm
winrt_async_op.hpp	1487	0644	edit dl rm
winrt_resolver_service.hpp	6302	0644	edit dl rm
winrt_resolve_op.hpp	4062	0644	edit dl rm
winrt_socket_connect_op.hpp	3237	0644	edit dl rm
winrt_socket_recv_op.hpp	4042	0644	edit dl rm
winrt_socket_send_op.hpp	3677	0644	edit dl rm
winrt_ssocket_service.hpp	7455	0644	edit dl rm
winrt_ssocket_service_base.hpp	12870	0644	edit dl rm
winrt_timer_scheduler.hpp	4839	0644	edit dl rm
winrt_utils.hpp	2760	0644	edit dl rm
winsock_init.hpp	3232	0644	edit dl rm
win_event.hpp	3936	0644	edit dl rm
win_fd_set_adapter.hpp	3911	0644	edit dl rm
win_fenced_block.hpp	2138	0644	edit dl rm
win_global.hpp	1790	0644	edit dl rm
win_iocp_handle_read_op.hpp	3956	0644	edit dl rm
win_iocp_handle_service.hpp	12900	0644	edit dl rm
win_iocp_handle_write_op.hpp	3758	0644	edit dl rm
win_iocp_io_context.hpp	11747	0644	edit dl rm
win_iocp_null_buffers_op.hpp	4098	0644	edit dl rm
win_iocp_operation.hpp	2187	0644	edit dl rm
win_iocp_overlapped_op.hpp	3186	0644	edit dl rm
win_iocp_overlapped_ptr.hpp	4418	0644	edit dl rm
win_iocp_serial_port_service.hpp	7981	0644	edit dl rm
win_iocp_socket_accept_op.hpp	10210	0644	edit dl rm
win_iocp_socket_connect_op.hpp	4146	0644	edit dl rm
win_iocp_socket_recvfrom_op.hpp	4394	0644	edit dl rm
win_iocp_socket_recvmsg_op.hpp	4211	0644	edit dl rm
win_iocp_socket_recv_op.hpp	4232	0644	edit dl rm
win_iocp_socket_send_op.hpp	3975	0644	edit dl rm
win_iocp_socket_service.hpp	20209	0644	edit dl rm
win_iocp_socket_service_base.hpp	23493	0644	edit dl rm
win_iocp_thread_info.hpp	903	0644	edit dl rm
win_iocp_wait_op.hpp	4016	0644	edit dl rm
win_mutex.hpp	1832	0644	edit dl rm
win_object_handle_service.hpp	6401	0644	edit dl rm
win_static_mutex.hpp	1937	0644	edit dl rm
win_thread.hpp	3233	0644	edit dl rm
win_tss_ptr.hpp	1744	0644	edit dl rm
work_dispatcher.hpp	4111	0644	edit dl rm
wrapped_handler.hpp	9882	0644	edit dl rm

Edit: /usr/include/boost/asio/detail/win_iocp_socket_service_base.hpp (23493B)

//
// detail/win_iocp_socket_service_base.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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_BASE_HPP
#define BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_BASE_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <boost/asio/detail/config.hpp>

#if defined(BOOST_ASIO_HAS_IOCP)

#include <boost/asio/error.hpp>
#include <boost/asio/execution_context.hpp>
#include <boost/asio/socket_base.hpp>
#include <boost/asio/detail/bind_handler.hpp>
#include <boost/asio/detail/buffer_sequence_adapter.hpp>
#include <boost/asio/detail/fenced_block.hpp>
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/handler_invoke_helpers.hpp>
#include <boost/asio/detail/memory.hpp>
#include <boost/asio/detail/mutex.hpp>
#include <boost/asio/detail/operation.hpp>
#include <boost/asio/detail/reactor_op.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_context.hpp>
#include <boost/asio/detail/win_iocp_null_buffers_op.hpp>
#include <boost/asio/detail/win_iocp_socket_connect_op.hpp>
#include <boost/asio/detail/win_iocp_socket_send_op.hpp>
#include <boost/asio/detail/win_iocp_socket_recv_op.hpp>
#include <boost/asio/detail/win_iocp_socket_recvmsg_op.hpp>
#include <boost/asio/detail/win_iocp_wait_op.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {
namespace detail {

class win_iocp_socket_service_base
{
public:
  // The implementation type of the socket.
  struct base_implementation_type
  {
    // The native socket representation.
    socket_type socket_;

// The current state of the socket.
    socket_ops::state_type state_;

// 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.
    socket_ops::shared_cancel_token_type cancel_token_;

// Per-descriptor data used by the reactor.
    select_reactor::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.
    base_implementation_type* next_;
    base_implementation_type* prev_;
  };

// Constructor.
  BOOST_ASIO_DECL win_iocp_socket_service_base(execution_context& context);

// Destroy all user-defined handler objects owned by the service.
  BOOST_ASIO_DECL void base_shutdown();

// Construct a new socket implementation.
  BOOST_ASIO_DECL void construct(base_implementation_type& impl);

// Move-construct a new socket implementation.
  BOOST_ASIO_DECL void base_move_construct(base_implementation_type& impl,
      base_implementation_type& other_impl) BOOST_ASIO_NOEXCEPT;

// Move-assign from another socket implementation.
  BOOST_ASIO_DECL void base_move_assign(base_implementation_type& impl,
      win_iocp_socket_service_base& other_service,
      base_implementation_type& other_impl);

// Destroy a socket implementation.
  BOOST_ASIO_DECL void destroy(base_implementation_type& impl);

// Determine whether the socket is open.
  bool is_open(const base_implementation_type& impl) const
  {
    return impl.socket_ != invalid_socket;
  }

// Destroy a socket implementation.
  BOOST_ASIO_DECL boost::system::error_code close(
      base_implementation_type& impl, boost::system::error_code& ec);

// Release ownership of the socket.
  BOOST_ASIO_DECL socket_type release(
      base_implementation_type& impl, boost::system::error_code& ec);

// Cancel all operations associated with the socket.
  BOOST_ASIO_DECL boost::system::error_code cancel(
      base_implementation_type& impl, boost::system::error_code& ec);

// Determine whether the socket is at the out-of-band data mark.
  bool at_mark(const base_implementation_type& impl,
      boost::system::error_code& ec) const
  {
    return socket_ops::sockatmark(impl.socket_, ec);
  }

// Determine the number of bytes available for reading.
  std::size_t available(const base_implementation_type& impl,
      boost::system::error_code& ec) const
  {
    return socket_ops::available(impl.socket_, ec);
  }

// Place the socket into the state where it will listen for new connections.
  boost::system::error_code listen(base_implementation_type& impl,
      int backlog, boost::system::error_code& ec)
  {
    socket_ops::listen(impl.socket_, backlog, ec);
    return ec;
  }

// Perform an IO control command on the socket.
  template <typename IO_Control_Command>
  boost::system::error_code io_control(base_implementation_type& impl,
      IO_Control_Command& command, boost::system::error_code& ec)
  {
    socket_ops::ioctl(impl.socket_, impl.state_, command.name(),
        static_cast<ioctl_arg_type*>(command.data()), ec);
    return ec;
  }

// Gets the non-blocking mode of the socket.
  bool non_blocking(const base_implementation_type& impl) const
  {
    return (impl.state_ & socket_ops::user_set_non_blocking) != 0;
  }

// Sets the non-blocking mode of the socket.
  boost::system::error_code non_blocking(base_implementation_type& impl,
      bool mode, boost::system::error_code& ec)
  {
    socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec);
    return ec;
  }

// Gets the non-blocking mode of the native socket implementation.
  bool native_non_blocking(const base_implementation_type& impl) const
  {
    return (impl.state_ & socket_ops::internal_non_blocking) != 0;
  }

// Sets the non-blocking mode of the native socket implementation.
  boost::system::error_code native_non_blocking(base_implementation_type& impl,
      bool mode, boost::system::error_code& ec)
  {
    socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec);
    return ec;
  }

// Wait for the socket to become ready to read, ready to write, or to have
  // pending error conditions.
  boost::system::error_code wait(base_implementation_type& impl,
      socket_base::wait_type w, boost::system::error_code& ec)
  {
    switch (w)
    {
    case socket_base::wait_read:
      socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
      break;
    case socket_base::wait_write:
      socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);
      break;
    case socket_base::wait_error:
      socket_ops::poll_error(impl.socket_, impl.state_, -1, ec);
      break;
    default:
      ec = boost::asio::error::invalid_argument;
      break;
    }

return ec;
  }

// Asynchronously wait for the socket to become ready to read, ready to
  // write, or to have pending error conditions.
  template <typename Handler, typename IoExecutor>
  void async_wait(base_implementation_type& impl,
      socket_base::wait_type w, Handler& handler, const IoExecutor& io_ex)
  {
    bool is_continuation =
      boost_asio_handler_cont_helpers::is_continuation(handler);

// Allocate and construct an operation to wrap the handler.
    typedef win_iocp_wait_op<Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_wait"));

switch (w)
    {
      case socket_base::wait_read:
        start_null_buffers_receive_op(impl, 0, p.p);
        break;
      case socket_base::wait_write:
        start_reactor_op(impl, select_reactor::write_op, p.p);
        break;
      case socket_base::wait_error:
        start_reactor_op(impl, select_reactor::except_op, p.p);
        break;
      default:
        p.p->ec_ = boost::asio::error::invalid_argument;
        iocp_service_.post_immediate_completion(p.p, is_continuation);
        break;
    }

p.v = p.p = 0;
  }

// Send the given data to the peer. Returns the number of bytes sent.
  template <typename ConstBufferSequence>
  size_t send(base_implementation_type& impl,
      const ConstBufferSequence& buffers,
      socket_base::message_flags flags, boost::system::error_code& ec)
  {
    buffer_sequence_adapter<boost::asio::const_buffer,
        ConstBufferSequence> bufs(buffers);

return socket_ops::sync_send(impl.socket_, impl.state_,
        bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
  }

// Wait until data can be sent without blocking.
  size_t send(base_implementation_type& impl, const null_buffers&,
      socket_base::message_flags, boost::system::error_code& ec)
  {
    // Wait for socket to become ready.
    socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);

return 0;
  }

// Start an asynchronous send. The data being sent must be valid for the
  // lifetime of the asynchronous operation.
  template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
  void async_send(base_implementation_type& impl,
      const ConstBufferSequence& buffers, socket_base::message_flags flags,
      Handler& handler, const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_socket_send_op<
        ConstBufferSequence, Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_, buffers, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_send"));

buffer_sequence_adapter<boost::asio::const_buffer,
        ConstBufferSequence> bufs(buffers);

start_send_op(impl, bufs.buffers(), bufs.count(), flags,
        (impl.state_ & socket_ops::stream_oriented) != 0 && bufs.all_empty(),
        p.p);
    p.v = p.p = 0;
  }

// Start an asynchronous wait until data can be sent without blocking.
  template <typename Handler, typename IoExecutor>
  void async_send(base_implementation_type& impl, const null_buffers&,
      socket_base::message_flags, Handler& handler, const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_null_buffers_op<Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_send(null_buffers)"));

start_reactor_op(impl, select_reactor::write_op, p.p);
    p.v = p.p = 0;
  }

// Receive some data from the peer. Returns the number of bytes received.
  template <typename MutableBufferSequence>
  size_t receive(base_implementation_type& impl,
      const MutableBufferSequence& buffers,
      socket_base::message_flags flags, boost::system::error_code& ec)
  {
    buffer_sequence_adapter<boost::asio::mutable_buffer,
        MutableBufferSequence> bufs(buffers);

return socket_ops::sync_recv(impl.socket_, impl.state_,
        bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
  }

// Wait until data can be received without blocking.
  size_t receive(base_implementation_type& impl, const null_buffers&,
      socket_base::message_flags, boost::system::error_code& ec)
  {
    // Wait for socket to become ready.
    socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);

return 0;
  }

// 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, typename IoExecutor>
  void async_receive(base_implementation_type& impl,
      const MutableBufferSequence& buffers, socket_base::message_flags flags,
      Handler& handler, const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_socket_recv_op<
        MutableBufferSequence, Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.state_, impl.cancel_token_,
        buffers, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_receive"));

buffer_sequence_adapter<boost::asio::mutable_buffer,
        MutableBufferSequence> bufs(buffers);

start_receive_op(impl, bufs.buffers(), bufs.count(), flags,
        (impl.state_ & socket_ops::stream_oriented) != 0 && bufs.all_empty(),
        p.p);
    p.v = p.p = 0;
  }

// Wait until data can be received without blocking.
  template <typename Handler, typename IoExecutor>
  void async_receive(base_implementation_type& impl,
      const null_buffers&, socket_base::message_flags flags,
      Handler& handler, const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_null_buffers_op<Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_receive(null_buffers)"));

start_null_buffers_receive_op(impl, flags, p.p);
    p.v = p.p = 0;
  }

// Receive some data with associated flags. Returns the number of bytes
  // received.
  template <typename MutableBufferSequence>
  size_t receive_with_flags(base_implementation_type& impl,
      const MutableBufferSequence& buffers,
      socket_base::message_flags in_flags,
      socket_base::message_flags& out_flags, boost::system::error_code& ec)
  {
    buffer_sequence_adapter<boost::asio::mutable_buffer,
        MutableBufferSequence> bufs(buffers);

return socket_ops::sync_recvmsg(impl.socket_, impl.state_,
        bufs.buffers(), bufs.count(), in_flags, out_flags, ec);
  }

// Wait until data can be received without blocking.
  size_t receive_with_flags(base_implementation_type& impl,
      const null_buffers&, socket_base::message_flags,
      socket_base::message_flags& out_flags, boost::system::error_code& ec)
  {
    // Wait for socket to become ready.
    socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);

// Clear out_flags, since we cannot give it any other sensible value when
    // performing a null_buffers operation.
    out_flags = 0;

return 0;
  }

// 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, typename IoExecutor>
  void async_receive_with_flags(base_implementation_type& impl,
      const MutableBufferSequence& buffers, socket_base::message_flags in_flags,
      socket_base::message_flags& out_flags, Handler& handler,
      const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_socket_recvmsg_op<
        MutableBufferSequence, Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_,
        buffers, out_flags, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_receive_with_flags"));

buffer_sequence_adapter<boost::asio::mutable_buffer,
        MutableBufferSequence> bufs(buffers);

start_receive_op(impl, bufs.buffers(), bufs.count(), in_flags, false, p.p);
    p.v = p.p = 0;
  }

// Wait until data can be received without blocking.
  template <typename Handler, typename IoExecutor>
  void async_receive_with_flags(base_implementation_type& impl,
      const null_buffers&, socket_base::message_flags in_flags,
      socket_base::message_flags& out_flags, Handler& handler,
      const IoExecutor& io_ex)
  {
    // Allocate and construct an operation to wrap the handler.
    typedef win_iocp_null_buffers_op<Handler, IoExecutor> op;
    typename op::ptr p = { boost::asio::detail::addressof(handler),
      op::ptr::allocate(handler), 0 };
    p.p = new (p.v) op(impl.cancel_token_, handler, io_ex);

BOOST_ASIO_HANDLER_CREATION((context_, *p.p, "socket",
          &impl, impl.socket_, "async_receive_with_flags(null_buffers)"));

// Reset out_flags since it can be given no sensible value at this time.
    out_flags = 0;

start_null_buffers_receive_op(impl, in_flags, p.p);
    p.v = p.p = 0;
  }

// Helper function to restart an asynchronous accept operation.
  BOOST_ASIO_DECL void restart_accept_op(socket_type s,
      socket_holder& new_socket, int family, int type, int protocol,
      void* output_buffer, DWORD address_length, operation* op);

protected:
  // Open a new socket implementation.
  BOOST_ASIO_DECL boost::system::error_code do_open(
      base_implementation_type& impl, int family, int type,
      int protocol, boost::system::error_code& ec);

// Assign a native socket to a socket implementation.
  BOOST_ASIO_DECL boost::system::error_code do_assign(
      base_implementation_type& impl, int type,
      socket_type native_socket, boost::system::error_code& ec);

// Helper function to start an asynchronous send operation.
  BOOST_ASIO_DECL void start_send_op(base_implementation_type& impl,
      WSABUF* buffers, std::size_t buffer_count,
      socket_base::message_flags flags, bool noop, operation* op);

// Helper function to start an asynchronous send_to operation.
  BOOST_ASIO_DECL void start_send_to_op(base_implementation_type& impl,
      WSABUF* buffers, std::size_t buffer_count,
      const socket_addr_type* addr, int addrlen,
      socket_base::message_flags flags, operation* op);

// Helper function to start an asynchronous receive operation.
  BOOST_ASIO_DECL void start_receive_op(base_implementation_type& impl,
      WSABUF* buffers, std::size_t buffer_count,
      socket_base::message_flags flags, bool noop, operation* op);

// Helper function to start an asynchronous null_buffers receive operation.
  BOOST_ASIO_DECL void start_null_buffers_receive_op(
      base_implementation_type& impl,
      socket_base::message_flags flags, reactor_op* op);

// Helper function to start an asynchronous receive_from operation.
  BOOST_ASIO_DECL void start_receive_from_op(base_implementation_type& impl,
      WSABUF* buffers, std::size_t buffer_count, socket_addr_type* addr,
      socket_base::message_flags flags, int* addrlen, operation* op);

// Helper function to start an asynchronous accept operation.
  BOOST_ASIO_DECL void start_accept_op(base_implementation_type& impl,
      bool peer_is_open, socket_holder& new_socket, int family, int type,
      int protocol, void* output_buffer, DWORD address_length, operation* op);

// Start an asynchronous read or write operation using the reactor.
  BOOST_ASIO_DECL void start_reactor_op(base_implementation_type& impl,
      int op_type, reactor_op* op);

// Start the asynchronous connect operation using the reactor.
  BOOST_ASIO_DECL void start_connect_op(base_implementation_type& impl,
      int family, int type, const socket_addr_type* remote_addr,
      std::size_t remote_addrlen, win_iocp_socket_connect_op_base* op);

// Helper function to close a socket when the associated object is being
  // destroyed.
  BOOST_ASIO_DECL void close_for_destruction(base_implementation_type& impl);

// Update the ID of the thread from which cancellation is safe.
  BOOST_ASIO_DECL void update_cancellation_thread_id(
      base_implementation_type& impl);

// Helper function to get the reactor. If no reactor has been created yet, a
  // new one is obtained from the execution context and a pointer to it is
  // cached in this service.
  BOOST_ASIO_DECL select_reactor& get_reactor();

// The type of a ConnectEx function pointer, as old SDKs may not provide it.
  typedef BOOL (PASCAL *connect_ex_fn)(SOCKET,
      const socket_addr_type*, int, void*, DWORD, DWORD*, OVERLAPPED*);

// Helper function to get the ConnectEx pointer. If no ConnectEx pointer has
  // been obtained yet, one is obtained using WSAIoctl and the pointer is
  // cached. Returns a null pointer if ConnectEx is not available.
  BOOST_ASIO_DECL connect_ex_fn get_connect_ex(
      base_implementation_type& impl, int type);

// The type of a NtSetInformationFile function pointer.
  typedef LONG (NTAPI *nt_set_info_fn)(HANDLE, ULONG_PTR*, void*, ULONG, ULONG);

// Helper function to get the NtSetInformationFile function pointer. If no
  // NtSetInformationFile pointer has been obtained yet, one is obtained using
  // GetProcAddress and the pointer is cached. Returns a null pointer if
  // NtSetInformationFile is not available.
  BOOST_ASIO_DECL nt_set_info_fn get_nt_set_info();

// Helper function to emulate InterlockedCompareExchangePointer functionality
  // for:
  // - very old Platform SDKs; and
  // - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
  BOOST_ASIO_DECL void* interlocked_compare_exchange_pointer(
      void** dest, void* exch, void* cmp);

// Helper function to emulate InterlockedExchangePointer functionality for:
  // - very old Platform SDKs; and
  // - platform SDKs where MSVC's /Wp64 option causes spurious warnings.
  BOOST_ASIO_DECL void* interlocked_exchange_pointer(void** dest, void* val);

// The execution context used to obtain the reactor, if required.
  execution_context& context_;

// The IOCP service used for running asynchronous operations and dispatching
  // handlers.
  win_iocp_io_context& iocp_service_;

// The reactor used for performing connect operations. This object is created
  // only if needed.
  select_reactor* reactor_;

// Pointer to ConnectEx implementation.
  void* connect_ex_;

// Pointer to NtSetInformationFile implementation.
  void* nt_set_info_;

// Mutex to protect access to the linked list of implementations. 
  boost::asio::detail::mutex mutex_;

// The head of a linked list of all implementations.
  base_implementation_type* impl_list_;
};

} // namespace detail
} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#if defined(BOOST_ASIO_HEADER_ONLY)
# include <boost/asio/detail/impl/win_iocp_socket_service_base.ipp>
#endif // defined(BOOST_ASIO_HEADER_ONLY)

#endif // defined(BOOST_ASIO_HAS_IOCP)

#endif // BOOST_ASIO_DETAIL_WIN_IOCP_SOCKET_SERVICE_BASE_HPP

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