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1 //
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2 // detail/posix_fd_set_adapter.hpp
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3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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4 //
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5 // Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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6 //
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7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
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8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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9 //
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10
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11 #ifndef BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
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12 #define BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
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13
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14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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15 # pragma once
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16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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17
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18 #include <boost/asio/detail/config.hpp>
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19
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20 #if !defined(BOOST_ASIO_WINDOWS) \
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21 && !defined(__CYGWIN__) \
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22 && !defined(BOOST_ASIO_WINDOWS_RUNTIME)
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23
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24 #include <cstring>
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25 #include <boost/asio/detail/noncopyable.hpp>
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26 #include <boost/asio/detail/socket_types.hpp>
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27
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28 #include <boost/asio/detail/push_options.hpp>
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29
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30 namespace boost {
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31 namespace asio {
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32 namespace detail {
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33
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34 // Adapts the FD_SET type to meet the Descriptor_Set concept's requirements.
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35 class posix_fd_set_adapter : noncopyable
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36 {
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37 public:
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38 posix_fd_set_adapter()
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39 : max_descriptor_(invalid_socket)
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40 {
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41 using namespace std; // Needed for memset on Solaris.
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42 FD_ZERO(&fd_set_);
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43 }
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44
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45 void reset()
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46 {
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47 using namespace std; // Needed for memset on Solaris.
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48 FD_ZERO(&fd_set_);
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49 }
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50
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51 bool set(socket_type descriptor)
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52 {
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53 if (descriptor < (socket_type)FD_SETSIZE)
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54 {
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55 if (max_descriptor_ == invalid_socket || descriptor > max_descriptor_)
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56 max_descriptor_ = descriptor;
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57 FD_SET(descriptor, &fd_set_);
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58 return true;
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59 }
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60 return false;
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61 }
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62
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63 bool is_set(socket_type descriptor) const
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64 {
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65 return FD_ISSET(descriptor, &fd_set_) != 0;
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66 }
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67
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68 operator fd_set*()
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69 {
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70 return &fd_set_;
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71 }
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72
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73 socket_type max_descriptor() const
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74 {
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75 return max_descriptor_;
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76 }
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77
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78 private:
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79 mutable fd_set fd_set_;
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80 socket_type max_descriptor_;
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81 };
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82
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83 } // namespace detail
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84 } // namespace asio
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85 } // namespace boost
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86
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87 #include <boost/asio/detail/pop_options.hpp>
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88
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89 #endif // !defined(BOOST_ASIO_WINDOWS)
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90 // && !defined(__CYGWIN__)
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91 // && !defined(BOOST_ASIO_WINDOWS_RUNTIME)
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92
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93 #endif // BOOST_ASIO_DETAIL_POSIX_FD_SET_ADAPTER_HPP
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