/usr/include/asio/detail/win_iocp_serial_port_service.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// win_iocp_serial_port_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 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_DETAIL_WIN_IOCP_SERIAL_PORT_SERVICE_HPP
#define ASIO_DETAIL_WIN_IOCP_SERIAL_PORT_SERVICE_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 <cstring>
#include <string>
#include "asio/detail/pop_options.hpp"
#include "asio/detail/win_iocp_io_service_fwd.hpp"
#if defined(ASIO_HAS_IOCP)
#include "asio/error.hpp"
#include "asio/io_service.hpp"
#include "asio/detail/win_iocp_handle_service.hpp"
namespace asio {
namespace detail {
// Extend win_iocp_handle_service to provide serial port support.
class win_iocp_serial_port_service
: public asio::detail::service_base<win_iocp_serial_port_service>
{
public:
// The native type of a stream handle.
typedef win_iocp_handle_service::native_type native_type;
// The implementation type of the stream handle.
typedef win_iocp_handle_service::implementation_type implementation_type;
win_iocp_serial_port_service(asio::io_service& io_service)
: asio::detail::service_base<
win_iocp_serial_port_service>(io_service),
handle_service_(
asio::use_service<win_iocp_handle_service>(io_service))
{
}
// Destroy all user-defined handler objects owned by the service.
void shutdown_service()
{
}
// Construct a new handle implementation.
void construct(implementation_type& impl)
{
handle_service_.construct(impl);
}
// Destroy a handle implementation.
void destroy(implementation_type& impl)
{
handle_service_.destroy(impl);
}
// Open the serial port using the specified device name.
asio::error_code open(implementation_type& impl,
const std::string& device, asio::error_code& ec)
{
if (is_open(impl))
{
ec = asio::error::already_open;
return ec;
}
// For convenience, add a leading \\.\ sequence if not already present.
std::string name = (device[0] == '\\') ? device : "\\\\.\\" + device;
// Open a handle to the serial port.
::HANDLE handle = ::CreateFileA(name.c_str(),
GENERIC_READ | GENERIC_WRITE, 0, 0,
OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
if (handle == INVALID_HANDLE_VALUE)
{
DWORD last_error = ::GetLastError();
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
// Determine the initial serial port parameters.
using namespace std; // For memcpy.
::DCB dcb;
memset(&dcb, 0, sizeof(DCB));
dcb.DCBlength = sizeof(DCB);
if (!::GetCommState(handle, &dcb))
{
DWORD last_error = ::GetLastError();
::CloseHandle(handle);
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
// Set some default serial port parameters. This implementation does not
// support changing these, so they might as well be in a known state.
dcb.fBinary = TRUE; // Win32 only supports binary mode.
dcb.fDsrSensitivity = FALSE;
dcb.fNull = FALSE; // Do not ignore NULL characters.
dcb.fAbortOnError = FALSE; // Ignore serial framing errors.
if (!::SetCommState(handle, &dcb))
{
DWORD last_error = ::GetLastError();
::CloseHandle(handle);
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
// Set up timeouts so that the serial port will behave similarly to a
// network socket. Reads wait for at least one byte, then return with
// whatever they have. Writes return once everything is out the door.
::COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = 1;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
if (!::SetCommTimeouts(handle, &timeouts))
{
DWORD last_error = ::GetLastError();
::CloseHandle(handle);
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
// We're done. Take ownership of the serial port handle.
if (handle_service_.assign(impl, handle, ec))
::CloseHandle(handle);
return ec;
}
// Assign a native handle to a handle implementation.
asio::error_code assign(implementation_type& impl,
const native_type& native_handle, asio::error_code& ec)
{
return handle_service_.assign(impl, native_handle, ec);
}
// Determine whether the handle is open.
bool is_open(const implementation_type& impl) const
{
return handle_service_.is_open(impl);
}
// Destroy a handle implementation.
asio::error_code close(implementation_type& impl,
asio::error_code& ec)
{
return handle_service_.close(impl, ec);
}
// Get the native handle representation.
native_type native(implementation_type& impl)
{
return handle_service_.native(impl);
}
// Cancel all operations associated with the handle.
asio::error_code cancel(implementation_type& impl,
asio::error_code& ec)
{
return handle_service_.cancel(impl, ec);
}
// Set an option on the serial port.
template <typename SettableSerialPortOption>
asio::error_code set_option(implementation_type& impl,
const SettableSerialPortOption& option, asio::error_code& ec)
{
using namespace std; // For memcpy.
::DCB dcb;
memset(&dcb, 0, sizeof(DCB));
dcb.DCBlength = sizeof(DCB);
if (!::GetCommState(handle_service_.native(impl), &dcb))
{
DWORD last_error = ::GetLastError();
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
if (option.store(dcb, ec))
return ec;
if (!::SetCommState(handle_service_.native(impl), &dcb))
{
DWORD last_error = ::GetLastError();
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
ec = asio::error_code();
return ec;
}
// Get an option from the serial port.
template <typename GettableSerialPortOption>
asio::error_code get_option(const implementation_type& impl,
GettableSerialPortOption& option, asio::error_code& ec) const
{
using namespace std; // For memcpy.
::DCB dcb;
memset(&dcb, 0, sizeof(DCB));
dcb.DCBlength = sizeof(DCB);
if (!::GetCommState(handle_service_.native(impl), &dcb))
{
DWORD last_error = ::GetLastError();
ec = asio::error_code(last_error,
asio::error::get_system_category());
return ec;
}
return option.load(dcb, ec);
}
// Send a break sequence to the serial port.
asio::error_code send_break(implementation_type& impl,
asio::error_code& ec)
{
ec = asio::error::operation_not_supported;
return ec;
}
// Write the given data. Returns the number of bytes sent.
template <typename ConstBufferSequence>
size_t write_some(implementation_type& impl,
const ConstBufferSequence& buffers, asio::error_code& ec)
{
return handle_service_.write_some(impl, buffers, 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)
{
handle_service_.async_write_some(impl, buffers, handler);
}
// Read some data. Returns the number of bytes received.
template <typename MutableBufferSequence>
size_t read_some(implementation_type& impl,
const MutableBufferSequence& buffers, asio::error_code& ec)
{
return handle_service_.read_some(impl, buffers, 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)
{
handle_service_.async_read_some(impl, buffers, handler);
}
private:
// The handle service used for initiating asynchronous operations.
win_iocp_handle_service& handle_service_;
};
} // namespace detail
} // namespace asio
#endif // defined(ASIO_HAS_IOCP)
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_WIN_IOCP_SERIAL_PORT_SERVICE_HPP
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