/usr/include/boost/asio/detail/win_iocp_handle_service.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 | //
// detail/win_iocp_handle_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
// Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.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_HANDLE_SERVICE_HPP
#define BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_SERVICE_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/io_service.hpp>
#include <boost/asio/detail/addressof.hpp>
#include <boost/asio/detail/buffer_sequence_adapter.hpp>
#include <boost/asio/detail/cstdint.hpp>
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/mutex.hpp>
#include <boost/asio/detail/operation.hpp>
#include <boost/asio/detail/win_iocp_handle_read_op.hpp>
#include <boost/asio/detail/win_iocp_handle_write_op.hpp>
#include <boost/asio/detail/win_iocp_io_service.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
class win_iocp_handle_service
{
public:
// The native type of a stream handle.
typedef HANDLE native_handle_type;
// The implementation type of the stream handle.
class implementation_type
{
public:
// Default constructor.
implementation_type()
: handle_(INVALID_HANDLE_VALUE),
safe_cancellation_thread_id_(0),
next_(0),
prev_(0)
{
}
private:
// Only this service will have access to the internal values.
friend class win_iocp_handle_service;
// The native stream handle representation.
native_handle_type handle_;
// 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 handle.
DWORD safe_cancellation_thread_id_;
// Pointers to adjacent handle implementations in linked list.
implementation_type* next_;
implementation_type* prev_;
};
BOOST_ASIO_DECL win_iocp_handle_service(boost::asio::io_service& io_service);
// Destroy all user-defined handler objects owned by the service.
BOOST_ASIO_DECL void shutdown_service();
// Construct a new handle implementation.
BOOST_ASIO_DECL void construct(implementation_type& impl);
// Move-construct a new handle implementation.
BOOST_ASIO_DECL void move_construct(implementation_type& impl,
implementation_type& other_impl);
// Move-assign from another handle implementation.
BOOST_ASIO_DECL void move_assign(implementation_type& impl,
win_iocp_handle_service& other_service,
implementation_type& other_impl);
// Destroy a handle implementation.
BOOST_ASIO_DECL void destroy(implementation_type& impl);
// Assign a native handle to a handle implementation.
BOOST_ASIO_DECL boost::system::error_code assign(implementation_type& impl,
const native_handle_type& handle, boost::system::error_code& ec);
// Determine whether the handle is open.
bool is_open(const implementation_type& impl) const
{
return impl.handle_ != INVALID_HANDLE_VALUE;
}
// Destroy a handle implementation.
BOOST_ASIO_DECL boost::system::error_code close(implementation_type& impl,
boost::system::error_code& ec);
// Get the native handle representation.
native_handle_type native_handle(const implementation_type& impl) const
{
return impl.handle_;
}
// Cancel all operations associated with the handle.
BOOST_ASIO_DECL boost::system::error_code cancel(implementation_type& impl,
boost::system::error_code& ec);
// Write the given data. Returns the number of bytes written.
template <typename ConstBufferSequence>
size_t write_some(implementation_type& impl,
const ConstBufferSequence& buffers, boost::system::error_code& ec)
{
return write_some_at(impl, 0, buffers, ec);
}
// Write the given data at the specified offset. Returns the number of bytes
// written.
template <typename ConstBufferSequence>
size_t write_some_at(implementation_type& impl, uint64_t offset,
const ConstBufferSequence& buffers, boost::system::error_code& ec)
{
boost::asio::const_buffer buffer =
buffer_sequence_adapter<boost::asio::const_buffer,
ConstBufferSequence>::first(buffers);
return do_write(impl, offset, buffer, ec);
}
// Start an asynchronous write. The data being written must be valid for the
// lifetime of the asynchronous operation.
template <typename ConstBufferSequence, typename Handler>
void async_write_some(implementation_type& impl,
const ConstBufferSequence& buffers, Handler& handler)
{
// Allocate and construct an operation to wrap the handler.
typedef win_iocp_handle_write_op<ConstBufferSequence, Handler> op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(buffers, handler);
BOOST_ASIO_HANDLER_CREATION((p.p, "handle", &impl, "async_write_some"));
start_write_op(impl, 0,
buffer_sequence_adapter<boost::asio::const_buffer,
ConstBufferSequence>::first(buffers), p.p);
p.v = p.p = 0;
}
// Start an asynchronous write at a specified offset. The data being written
// must be valid for the lifetime of the asynchronous operation.
template <typename ConstBufferSequence, typename Handler>
void async_write_some_at(implementation_type& impl, uint64_t offset,
const ConstBufferSequence& buffers, Handler& handler)
{
// Allocate and construct an operation to wrap the handler.
typedef win_iocp_handle_write_op<ConstBufferSequence, Handler> op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(buffers, handler);
BOOST_ASIO_HANDLER_CREATION((p.p, "handle", &impl, "async_write_some_at"));
start_write_op(impl, offset,
buffer_sequence_adapter<boost::asio::const_buffer,
ConstBufferSequence>::first(buffers), p.p);
p.v = p.p = 0;
}
// Read some data. Returns the number of bytes received.
template <typename MutableBufferSequence>
size_t read_some(implementation_type& impl,
const MutableBufferSequence& buffers, boost::system::error_code& ec)
{
return read_some_at(impl, 0, buffers, ec);
}
// Read some data at a specified offset. Returns the number of bytes received.
template <typename MutableBufferSequence>
size_t read_some_at(implementation_type& impl, uint64_t offset,
const MutableBufferSequence& buffers, boost::system::error_code& ec)
{
boost::asio::mutable_buffer buffer =
buffer_sequence_adapter<boost::asio::mutable_buffer,
MutableBufferSequence>::first(buffers);
return do_read(impl, offset, buffer, ec);
}
// Start an asynchronous read. The buffer for the data being received must be
// valid for the lifetime of the asynchronous operation.
template <typename MutableBufferSequence, typename Handler>
void async_read_some(implementation_type& impl,
const MutableBufferSequence& buffers, Handler& handler)
{
// Allocate and construct an operation to wrap the handler.
typedef win_iocp_handle_read_op<MutableBufferSequence, Handler> op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(buffers, handler);
BOOST_ASIO_HANDLER_CREATION((p.p, "handle", &impl, "async_read_some"));
start_read_op(impl, 0,
buffer_sequence_adapter<boost::asio::mutable_buffer,
MutableBufferSequence>::first(buffers), p.p);
p.v = p.p = 0;
}
// Start an asynchronous read at a specified offset. The buffer for the data
// being received must be valid for the lifetime of the asynchronous
// operation.
template <typename MutableBufferSequence, typename Handler>
void async_read_some_at(implementation_type& impl, uint64_t offset,
const MutableBufferSequence& buffers, Handler& handler)
{
// Allocate and construct an operation to wrap the handler.
typedef win_iocp_handle_read_op<MutableBufferSequence, Handler> op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(buffers, handler);
BOOST_ASIO_HANDLER_CREATION((p.p, "handle", &impl, "async_read_some_at"));
start_read_op(impl, offset,
buffer_sequence_adapter<boost::asio::mutable_buffer,
MutableBufferSequence>::first(buffers), p.p);
p.v = p.p = 0;
}
private:
// Prevent the use of the null_buffers type with this service.
size_t write_some(implementation_type& impl,
const null_buffers& buffers, boost::system::error_code& ec);
size_t write_some_at(implementation_type& impl, uint64_t offset,
const null_buffers& buffers, boost::system::error_code& ec);
template <typename Handler>
void async_write_some(implementation_type& impl,
const null_buffers& buffers, Handler& handler);
template <typename Handler>
void async_write_some_at(implementation_type& impl, uint64_t offset,
const null_buffers& buffers, Handler& handler);
size_t read_some(implementation_type& impl,
const null_buffers& buffers, boost::system::error_code& ec);
size_t read_some_at(implementation_type& impl, uint64_t offset,
const null_buffers& buffers, boost::system::error_code& ec);
template <typename Handler>
void async_read_some(implementation_type& impl,
const null_buffers& buffers, Handler& handler);
template <typename Handler>
void async_read_some_at(implementation_type& impl, uint64_t offset,
const null_buffers& buffers, Handler& handler);
// Helper class for waiting for synchronous operations to complete.
class overlapped_wrapper;
// Helper function to perform a synchronous write operation.
BOOST_ASIO_DECL size_t do_write(implementation_type& impl,
uint64_t offset, const boost::asio::const_buffer& buffer,
boost::system::error_code& ec);
// Helper function to start a write operation.
BOOST_ASIO_DECL void start_write_op(implementation_type& impl,
uint64_t offset, const boost::asio::const_buffer& buffer,
operation* op);
// Helper function to perform a synchronous write operation.
BOOST_ASIO_DECL size_t do_read(implementation_type& impl,
uint64_t offset, const boost::asio::mutable_buffer& buffer,
boost::system::error_code& ec);
// Helper function to start a read operation.
BOOST_ASIO_DECL void start_read_op(implementation_type& impl,
uint64_t offset, const boost::asio::mutable_buffer& buffer,
operation* op);
// Update the ID of the thread from which cancellation is safe.
BOOST_ASIO_DECL void update_cancellation_thread_id(implementation_type& impl);
// Helper function to close a handle when the associated object is being
// destroyed.
BOOST_ASIO_DECL void close_for_destruction(implementation_type& impl);
// The IOCP service used for running asynchronous operations and dispatching
// handlers.
win_iocp_io_service& iocp_service_;
// Mutex to protect access to the linked list of implementations.
mutex mutex_;
// The head of a linked list of all implementations.
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_handle_service.ipp>
#endif // defined(BOOST_ASIO_HEADER_ONLY)
#endif // defined(BOOST_ASIO_HAS_IOCP)
#endif // BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_SERVICE_HPP
|