libstdc++-v3/include/std/system_error

   1 // <system_error> -*- C++ -*-
   2
   3 // Copyright (C) 2007 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 // Boston, MA 02110-1301, USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 /** @file include/system_error
  31  *  This is a Standard C++ Library header.
  32  */
  33
  34 #ifndef _GLIBCXX_SYSTEM_ERROR
  35 #define _GLIBCXX_SYSTEM_ERROR 1
  36
  37 #pragma GCC system_header
  38
  39 #ifndef __GXX_EXPERIMENTAL_CXX0X__
  40 # include <c++0x_warning.h>
  41 #endif
  42
  43 #include <bits/c++config.h>
  44 #include <cerrno>
  45 #include <iosfwd>
  46 #include <stdexcept>
  47
  48 _GLIBCXX_BEGIN_NAMESPACE(std)
  49
  50   class system_error;
  51   class error_code;
  52   class error_category;
  53
  54   extern const error_category& system_category;
  55
  56   enum posix_errno
  57     {
  58       address_family_not_supported =            EAFNOSUPPORT,
  59       address_in_use =                          EADDRINUSE,
  60       address_not_available =                   EADDRNOTAVAIL,
  61       already_connected =                       EISCONN,
  62       argument_list_too_long =                  E2BIG,
  63       argument_out_of_domain =                  EDOM,
  64       bad_address =                             EFAULT,
  65       bad_file_descriptor =                     EBADF,
  66       bad_message =                             EBADMSG,
  67       broken_pipe =                             EPIPE,
  68       connection_aborted =                      ECONNABORTED,
  69       connection_already_in_progress =          EALREADY,
  70       connection_refused =                      ECONNREFUSED,
  71       connection_reset =                        ECONNRESET,
  72       cross_device_link =                       EXDEV,
  73       destination_address_required =            EDESTADDRREQ,
  74       device_or_resource_busy =                 EBUSY,
  75       directory_not_empty =                     ENOTEMPTY,
  76       executable_format_error =                 ENOEXEC,
  77       file_exists =                             EEXIST,
  78       file_too_large =                          EFBIG,
  79       filename_too_long =                       ENAMETOOLONG,
  80       function_not_supported =                  ENOSYS,
  81       host_unreachable =                        EHOSTUNREACH,
  82       identifier_removed =                      EIDRM,
  83       illegal_byte_sequence =                   EILSEQ,
  84       inappropriate_io_control_operation =      ENOTTY,
  85       interrupted =                             EINTR,
  86       invalid_argument =                        EINVAL,
  87       invalid_seek =                            ESPIPE,
  88       io_error =                                EIO,
  89       is_a_directory =                          EISDIR,
  90       message_size =                            EMSGSIZE,
  91       network_down =                            ENETDOWN,
  92       network_reset =                           ENETRESET,
  93       network_unreachable =                     ENETUNREACH,
  94       no_buffer_space =                         ENOBUFS,
  95       no_child_process =                        ECHILD,
  96 #ifdef _GLIBCXX_HAVE_ENOLINK
  97       no_link =                                 ENOLINK,
  98 #endif
  99       no_lock_available =                       ENOLCK,
 100       no_message_available =                    ENODATA,
 101       no_message =                              ENOMSG,
 102       no_protocol_option =                      ENOPROTOOPT,
 103       no_space_on_device =                      ENOSPC,
 104       no_stream_resources =                     ENOSR,
 105       no_such_device_or_address =               ENXIO,
 106       no_such_device =                          ENODEV,
 107       no_such_file_or_directory =               ENOENT,
 108       no_such_process =                         ESRCH,
 109       not_a_directory =                         ENOTDIR,
 110       not_a_socket =                            ENOTSOCK,
 111       not_a_stream =                            ENOSTR,
 112       not_connected =                           ENOTCONN,
 113       not_enough_memory =                       ENOMEM,
 114       not_supported =                           ENOTSUP,
 115       operation_canceled =                      ECANCELED,
 116       operation_in_progress =                   EINPROGRESS,
 117       operation_not_permitted =                 EPERM,
 118       operation_not_supported =                 EOPNOTSUPP,
 119       operation_would_block =                   EWOULDBLOCK,
 120 #ifdef _GLIBCXX_HAVE_EOWNERDEAD
 121       owner_dead =                              EOWNERDEAD,
 122 #endif
 123       permission_denied =                       EACCES,
 124 #ifdef _GLIBCXX_HAVE_EPROTO
 125       protocol_error =                          EPROTO,
 126 #endif
 127       protocol_not_supported =                  EPROTONOSUPPORT,
 128       read_only_file_system =                   EROFS,
 129       resource_deadlock_would_occur =           EDEADLK,
 130       resource_unavailable_try_again =          EAGAIN,
 131       result_out_of_range =                     ERANGE,
 132 #ifdef _GLIBCXX_HAVE_ENOTRECOVERABLE
 133       state_not_recoverable =                   ENOTRECOVERABLE,
 134 #endif
 135       stream_timeout =                          ETIME,
 136       text_file_busy =                          ETXTBSY,
 137       timed_out =                               ETIMEDOUT,
 138       too_many_files_open_in_system =           ENFILE,
 139       too_many_files_open =                     EMFILE,
 140       too_many_links =                          EMLINK,
 141       too_many_synbolic_link_levels =           ELOOP,
 142       value_too_large =                         EOVERFLOW,
 143       wrong_protocol_type =                     EPROTOTYPE,
 144       no_posix_equivalent = 1L << 16
 145     };
 146
 147   struct error_category
 148   {
 149     error_category() { }
 150
 151     bool
 152     operator==(const error_category& __other) const
 153     { return this == &__other; }
 154
 155     bool
 156     operator!=(const error_category& __other) const
 157     { return this != &__other; }
 158
 159     virtual posix_errno
 160     posix(int __v) const = 0;
 161
 162     virtual const string&
 163     name() const = 0;
 164
 165   private:
 166     error_category(const error_category&);
 167
 168     error_category&
 169     operator=(const error_category&);
 170   };
 171
 172   struct error_code
 173   {
 174     error_code() throw()
 175     : _M_value(0), _M_cat(&system_category) { }
 176
 177     error_code(int __v, const error_category& __cat) throw()
 178     : _M_value(__v), _M_cat(&__cat) { }
 179
 180     error_code(posix_errno __v)
 181     : _M_value(__v), _M_cat(&system_category) { }
 182
 183     void
 184     assign(int __v, const error_category& __cat) throw()
 185     {
 186       _M_value = __v;
 187       _M_cat = &__cat;
 188     }
 189
 190     void
 191     clear() throw()
 192     {
 193       _M_value = 0;
 194       _M_cat = &system_category;
 195    }
 196
 197     int
 198     value() const throw() { return _M_value; }
 199
 200     const error_category&
 201     category() const { return *_M_cat; }
 202
 203     posix_errno
 204     posix() const throw() { return this->category().posix(_M_value); }
 205
 206     // Safe bool idiom.
 207     // explicit operator bool() const throw()
 208     // { return _M_value != 0; }
 209     typedef void (*__bool_type)();
 210
 211     static void __not_bool_type() { }
 212
 213     operator __bool_type() const throw()
 214     { return _M_value != 0 ? &__not_bool_type : false; }
 215
 216     bool operator==(const error_code& __other) const
 217     { return value() == __other.value() && category() == __other.category(); }
 218
 219     bool operator!=(const error_code& __other) const
 220     { return !(this == &__other); }
 221
 222   private:
 223     int                         _M_value;
 224     const error_category*       _M_cat;
 225   };
 226
 227   class system_error : public std::runtime_error
 228   {
 229   private:
 230     error_code  _M_code;
 231
 232   public:
 233     system_error(const string& __what, error_code __ec = error_code())
 234     : runtime_error(__what), _M_code(__ec) { }
 235
 236     system_error(const string& __what, int __v, const error_category& __ecat)
 237     : runtime_error(__what), _M_code(error_code(__v, __ecat)) { }
 238
 239     virtual ~system_error() throw();
 240
 241     const error_code&
 242     code() const throw() { return _M_code; }
 243   };
 244
 245 _GLIBCXX_END_NAMESPACE
 246
 247 #endif
 248