basic_serial_port.hpp 21 KB
Newer Older
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622
//
// basic_serial_port.hpp
// ~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2010 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 ASIO_BASIC_SERIAL_PORT_HPP
#define ASIO_BASIC_SERIAL_PORT_HPP

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

#include "asio/detail/push_options.hpp"

#include "asio/detail/push_options.hpp"
#include <string>
#include <boost/config.hpp>
#include "asio/detail/pop_options.hpp"

#include "asio/basic_io_object.hpp"
#include "asio/error.hpp"
#include "asio/serial_port_base.hpp"
#include "asio/serial_port_service.hpp"
#include "asio/detail/throw_error.hpp"

#if defined(ASIO_HAS_SERIAL_PORT) \
  || defined(GENERATING_DOCUMENTATION)

namespace asio {

/// Provides serial port functionality.
/**
 * The basic_serial_port class template provides functionality that is common
 * to all serial ports.
 *
 * @par Thread Safety
 * @e Distinct @e objects: Safe.@n
 * @e Shared @e objects: Unsafe.
 */
template <typename SerialPortService = serial_port_service>
class basic_serial_port
  : public basic_io_object<SerialPortService>,
    public serial_port_base
{
public:
  /// The native representation of a serial port.
  typedef typename SerialPortService::native_type native_type;

  /// A basic_serial_port is always the lowest layer.
  typedef basic_serial_port<SerialPortService> lowest_layer_type;

  /// Construct a basic_serial_port without opening it.
  /**
   * This constructor creates a serial port without opening it.
   *
   * @param io_service The io_service object that the serial port will use to
   * dispatch handlers for any asynchronous operations performed on the port.
   */
  explicit basic_serial_port(asio::io_service& io_service)
    : basic_io_object<SerialPortService>(io_service)
  {
  }

  /// Construct and open a basic_serial_port.
  /**
   * This constructor creates and opens a serial port for the specified device
   * name.
   *
   * @param io_service The io_service object that the serial port will use to
   * dispatch handlers for any asynchronous operations performed on the port.
   *
   * @param device The platform-specific device name for this serial
   * port.
   */
  explicit basic_serial_port(asio::io_service& io_service,
      const char* device)
    : basic_io_object<SerialPortService>(io_service)
  {
    asio::error_code ec;
    this->service.open(this->implementation, device, ec);
    asio::detail::throw_error(ec);
  }

  /// Construct and open a basic_serial_port.
  /**
   * This constructor creates and opens a serial port for the specified device
   * name.
   *
   * @param io_service The io_service object that the serial port will use to
   * dispatch handlers for any asynchronous operations performed on the port.
   *
   * @param device The platform-specific device name for this serial
   * port.
   */
  explicit basic_serial_port(asio::io_service& io_service,
      const std::string& device)
    : basic_io_object<SerialPortService>(io_service)
  {
    asio::error_code ec;
    this->service.open(this->implementation, device, ec);
    asio::detail::throw_error(ec);
  }

  /// Construct a basic_serial_port on an existing native serial port.
  /**
   * This constructor creates a serial port object to hold an existing native
   * serial port.
   *
   * @param io_service The io_service object that the serial port will use to
   * dispatch handlers for any asynchronous operations performed on the port.
   *
   * @param native_serial_port A native serial port.
   *
   * @throws asio::system_error Thrown on failure.
   */
  basic_serial_port(asio::io_service& io_service,
      const native_type& native_serial_port)
    : basic_io_object<SerialPortService>(io_service)
  {
    asio::error_code ec;
    this->service.assign(this->implementation, native_serial_port, ec);
    asio::detail::throw_error(ec);
  }

  /// Get a reference to the lowest layer.
  /**
   * This function returns a reference to the lowest layer in a stack of
   * layers. Since a basic_serial_port cannot contain any further layers, it
   * simply returns a reference to itself.
   *
   * @return A reference to the lowest layer in the stack of layers. Ownership
   * is not transferred to the caller.
   */
  lowest_layer_type& lowest_layer()
  {
    return *this;
  }

  /// Get a const reference to the lowest layer.
  /**
   * This function returns a const reference to the lowest layer in a stack of
   * layers. Since a basic_serial_port cannot contain any further layers, it
   * simply returns a reference to itself.
   *
   * @return A const reference to the lowest layer in the stack of layers.
   * Ownership is not transferred to the caller.
   */
  const lowest_layer_type& lowest_layer() const
  {
    return *this;
  }

  /// Open the serial port using the specified device name.
  /**
   * This function opens the serial port for the specified device name.
   *
   * @param device The platform-specific device name.
   *
   * @throws asio::system_error Thrown on failure.
   */
  void open(const std::string& device)
  {
    asio::error_code ec;
    this->service.open(this->implementation, device, ec);
    asio::detail::throw_error(ec);
  }

  /// Open the serial port using the specified device name.
  /**
   * This function opens the serial port using the given platform-specific
   * device name.
   *
   * @param device The platform-specific device name.
   *
   * @param ec Set the indicate what error occurred, if any.
   */
  asio::error_code open(const std::string& device,
      asio::error_code& ec)
  {
    return this->service.open(this->implementation, device, ec);
  }

  /// Assign an existing native serial port to the serial port.
  /*
   * This function opens the serial port to hold an existing native serial port.
   *
   * @param native_serial_port A native serial port.
   *
   * @throws asio::system_error Thrown on failure.
   */
  void assign(const native_type& native_serial_port)
  {
    asio::error_code ec;
    this->service.assign(this->implementation, native_serial_port, ec);
    asio::detail::throw_error(ec);
  }

  /// Assign an existing native serial port to the serial port.
  /*
   * This function opens the serial port to hold an existing native serial port.
   *
   * @param native_serial_port A native serial port.
   *
   * @param ec Set to indicate what error occurred, if any.
   */
  asio::error_code assign(const native_type& native_serial_port,
      asio::error_code& ec)
  {
    return this->service.assign(this->implementation, native_serial_port, ec);
  }

  /// Determine whether the serial port is open.
  bool is_open() const
  {
    return this->service.is_open(this->implementation);
  }

  /// Close the serial port.
  /**
   * This function is used to close the serial port. Any asynchronous read or
   * write operations will be cancelled immediately, and will complete with the
   * asio::error::operation_aborted error.
   *
   * @throws asio::system_error Thrown on failure.
   */
  void close()
  {
    asio::error_code ec;
    this->service.close(this->implementation, ec);
    asio::detail::throw_error(ec);
  }

  /// Close the serial port.
  /**
   * This function is used to close the serial port. Any asynchronous read or
   * write operations will be cancelled immediately, and will complete with the
   * asio::error::operation_aborted error.
   *
   * @param ec Set to indicate what error occurred, if any.
   */
  asio::error_code close(asio::error_code& ec)
  {
    return this->service.close(this->implementation, ec);
  }

  /// Get the native serial port representation.
  /**
   * This function may be used to obtain the underlying representation of the
   * serial port. This is intended to allow access to native serial port
   * functionality that is not otherwise provided.
   */
  native_type native()
  {
    return this->service.native(this->implementation);
  }

  /// Cancel all asynchronous operations associated with the serial port.
  /**
   * This function causes all outstanding asynchronous read or write operations
   * to finish immediately, and the handlers for cancelled operations will be
   * passed the asio::error::operation_aborted error.
   *
   * @throws asio::system_error Thrown on failure.
   */
  void cancel()
  {
    asio::error_code ec;
    this->service.cancel(this->implementation, ec);
    asio::detail::throw_error(ec);
  }

  /// Cancel all asynchronous operations associated with the serial port.
  /**
   * This function causes all outstanding asynchronous read or write operations
   * to finish immediately, and the handlers for cancelled operations will be
   * passed the asio::error::operation_aborted error.
   *
   * @param ec Set to indicate what error occurred, if any.
   */
  asio::error_code cancel(asio::error_code& ec)
  {
    return this->service.cancel(this->implementation, ec);
  }

  /// Send a break sequence to the serial port.
  /**
   * This function causes a break sequence of platform-specific duration to be
   * sent out the serial port.
   *
   * @throws asio::system_error Thrown on failure.
   */
  void send_break()
  {
    asio::error_code ec;
    this->service.send_break(this->implementation, ec);
    asio::detail::throw_error(ec);
  }

  /// Send a break sequence to the serial port.
  /**
   * This function causes a break sequence of platform-specific duration to be
   * sent out the serial port.
   *
   * @param ec Set to indicate what error occurred, if any.
   */
  asio::error_code send_break(asio::error_code& ec)
  {
    return this->service.send_break(this->implementation, ec);
  }

  /// Set an option on the serial port.
  /**
   * This function is used to set an option on the serial port.
   *
   * @param option The option value to be set on the serial port.
   *
   * @throws asio::system_error Thrown on failure.
   *
   * @sa SettableSerialPortOption @n
   * asio::serial_port_base::baud_rate @n
   * asio::serial_port_base::flow_control @n
   * asio::serial_port_base::parity @n
   * asio::serial_port_base::stop_bits @n
   * asio::serial_port_base::character_size
   */
  template <typename SettableSerialPortOption>
  void set_option(const SettableSerialPortOption& option)
  {
    asio::error_code ec;
    this->service.set_option(this->implementation, option, ec);
    asio::detail::throw_error(ec);
  }

  /// Set an option on the serial port.
  /**
   * This function is used to set an option on the serial port.
   *
   * @param option The option value to be set on the serial port.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @sa SettableSerialPortOption @n
   * asio::serial_port_base::baud_rate @n
   * asio::serial_port_base::flow_control @n
   * asio::serial_port_base::parity @n
   * asio::serial_port_base::stop_bits @n
   * asio::serial_port_base::character_size
   */
  template <typename SettableSerialPortOption>
  asio::error_code set_option(const SettableSerialPortOption& option,
      asio::error_code& ec)
  {
    return this->service.set_option(this->implementation, option, ec);
  }

  /// Get an option from the serial port.
  /**
   * This function is used to get the current value of an option on the serial
   * port.
   *
   * @param option The option value to be obtained from the serial port.
   *
   * @throws asio::system_error Thrown on failure.
   *
   * @sa GettableSerialPortOption @n
   * asio::serial_port_base::baud_rate @n
   * asio::serial_port_base::flow_control @n
   * asio::serial_port_base::parity @n
   * asio::serial_port_base::stop_bits @n
   * asio::serial_port_base::character_size
   */
  template <typename GettableSerialPortOption>
  void get_option(GettableSerialPortOption& option)
  {
    asio::error_code ec;
    this->service.get_option(this->implementation, option, ec);
    asio::detail::throw_error(ec);
  }

  /// Get an option from the serial port.
  /**
   * This function is used to get the current value of an option on the serial
   * port.
   *
   * @param option The option value to be obtained from the serial port.
   *
   * @param ec Set to indicate what error occured, if any.
   *
   * @sa GettableSerialPortOption @n
   * asio::serial_port_base::baud_rate @n
   * asio::serial_port_base::flow_control @n
   * asio::serial_port_base::parity @n
   * asio::serial_port_base::stop_bits @n
   * asio::serial_port_base::character_size
   */
  template <typename GettableSerialPortOption>
  asio::error_code get_option(GettableSerialPortOption& option,
      asio::error_code& ec)
  {
    return this->service.get_option(this->implementation, option, ec);
  }

  /// Write some data to the serial port.
  /**
   * This function is used to write data to the serial port. The function call
   * will block until one or more bytes of the data has been written
   * successfully, or until an error occurs.
   *
   * @param buffers One or more data buffers to be written to the serial port.
   *
   * @returns The number of bytes written.
   *
   * @throws asio::system_error Thrown on failure. An error code of
   * asio::error::eof indicates that the connection was closed by the
   * peer.
   *
   * @note The write_some operation may not transmit all of the data to the
   * peer. Consider using the @ref write function if you need to ensure that
   * all data is written before the blocking operation completes.
   *
   * @par Example
   * To write a single data buffer use the @ref buffer function as follows:
   * @code
   * serial_port.write_some(asio::buffer(data, size));
   * @endcode
   * See the @ref buffer documentation for information on writing multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence>
  std::size_t write_some(const ConstBufferSequence& buffers)
  {
    asio::error_code ec;
    std::size_t s = this->service.write_some(this->implementation, buffers, ec);
    asio::detail::throw_error(ec);
    return s;
  }

  /// Write some data to the serial port.
  /**
   * This function is used to write data to the serial port. The function call
   * will block until one or more bytes of the data has been written
   * successfully, or until an error occurs.
   *
   * @param buffers One or more data buffers to be written to the serial port.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @returns The number of bytes written. Returns 0 if an error occurred.
   *
   * @note The write_some operation may not transmit all of the data to the
   * peer. Consider using the @ref write function if you need to ensure that
   * all data is written before the blocking operation completes.
   */
  template <typename ConstBufferSequence>
  std::size_t write_some(const ConstBufferSequence& buffers,
      asio::error_code& ec)
  {
    return this->service.write_some(this->implementation, buffers, ec);
  }

  /// Start an asynchronous write.
  /**
   * This function is used to asynchronously write data to the serial port.
   * The function call always returns immediately.
   *
   * @param buffers One or more data buffers to be written to the serial port.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param handler The handler to be called when the write operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const asio::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes written.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::post().
   *
   * @note The write operation may not transmit all of the data to the peer.
   * Consider using the @ref async_write function if you need to ensure that all
   * data is written before the asynchronous operation completes.
   *
   * @par Example
   * To write a single data buffer use the @ref buffer function as follows:
   * @code
   * serial_port.async_write_some(asio::buffer(data, size), handler);
   * @endcode
   * See the @ref buffer documentation for information on writing multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence, typename WriteHandler>
  void async_write_some(const ConstBufferSequence& buffers,
      WriteHandler handler)
  {
    this->service.async_write_some(this->implementation, buffers, handler);
  }

  /// Read some data from the serial port.
  /**
   * This function is used to read data from the serial port. The function
   * call will block until one or more bytes of data has been read successfully,
   * or until an error occurs.
   *
   * @param buffers One or more buffers into which the data will be read.
   *
   * @returns The number of bytes read.
   *
   * @throws asio::system_error Thrown on failure. An error code of
   * asio::error::eof indicates that the connection was closed by the
   * peer.
   *
   * @note The read_some operation may not read all of the requested number of
   * bytes. Consider using the @ref read function if you need to ensure that
   * the requested amount of data is read before the blocking operation
   * completes.
   *
   * @par Example
   * To read into a single data buffer use the @ref buffer function as follows:
   * @code
   * serial_port.read_some(asio::buffer(data, size));
   * @endcode
   * See the @ref buffer documentation for information on reading into multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence>
  std::size_t read_some(const MutableBufferSequence& buffers)
  {
    asio::error_code ec;
    std::size_t s = this->service.read_some(this->implementation, buffers, ec);
    asio::detail::throw_error(ec);
    return s;
  }

  /// Read some data from the serial port.
  /**
   * This function is used to read data from the serial port. The function
   * call will block until one or more bytes of data has been read successfully,
   * or until an error occurs.
   *
   * @param buffers One or more buffers into which the data will be read.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @returns The number of bytes read. Returns 0 if an error occurred.
   *
   * @note The read_some operation may not read all of the requested number of
   * bytes. Consider using the @ref read function if you need to ensure that
   * the requested amount of data is read before the blocking operation
   * completes.
   */
  template <typename MutableBufferSequence>
  std::size_t read_some(const MutableBufferSequence& buffers,
      asio::error_code& ec)
  {
    return this->service.read_some(this->implementation, buffers, ec);
  }

  /// Start an asynchronous read.
  /**
   * This function is used to asynchronously read data from the serial port.
   * The function call always returns immediately.
   *
   * @param buffers One or more buffers into which the data will be read.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param handler The handler to be called when the read operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const asio::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes read.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::post().
   *
   * @note The read operation may not read all of the requested number of bytes.
   * Consider using the @ref async_read function if you need to ensure that the
   * requested amount of data is read before the asynchronous operation
   * completes.
   *
   * @par Example
   * To read into a single data buffer use the @ref buffer function as follows:
   * @code
   * serial_port.async_read_some(asio::buffer(data, size), handler);
   * @endcode
   * See the @ref buffer documentation for information on reading into multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence, typename ReadHandler>
  void async_read_some(const MutableBufferSequence& buffers,
      ReadHandler handler)
  {
    this->service.async_read_some(this->implementation, buffers, handler);
  }
};

} // namespace asio

#endif // defined(ASIO_HAS_SERIAL_PORT)
       //   || defined(GENERATING_DOCUMENTATION)

#include "asio/detail/pop_options.hpp"

#endif // ASIO_BASIC_SERIAL_PORT_HPP