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
  97 #ifdef _GLIBCXX_HAVE_ENOLINK
  98       no_link =                                 ENOLINK,
  99 #endif
 100       no_lock_available =                       ENOLCK,
 101
 102 #ifdef _GLIBCXX_HAVE_ENODATA
 103       no_message_available =                    ENODATA,
 104 #endif
 105
 106       no_message =                              ENOMSG,
 107       no_protocol_option =                      ENOPROTOOPT,
 108       no_space_on_device =                      ENOSPC,
 109
 110 #ifdef _GLIBCXX_HAVE_ENOSR
 111       no_stream_resources =                     ENOSR,
 112 #endif
 113
 114       no_such_device_or_address =               ENXIO,
 115       no_such_device =                          ENODEV,
 116       no_such_file_or_directory =               ENOENT,
 117       no_such_process =                         ESRCH,
 118       not_a_directory =                         ENOTDIR,
 119       not_a_socket =                            ENOTSOCK,
 120
 121 #ifdef _GLIBCXX_HAVE_ENOSTR
 122       not_a_stream =                            ENOSTR,
 123 #endif
 124
 125       not_connected =                           ENOTCONN,
 126       not_enough_memory =                       ENOMEM,
 127       not_supported =                           ENOTSUP,
 128       operation_canceled =                      ECANCELED,
 129       operation_in_progress =                   EINPROGRESS,
 130       operation_not_permitted =                 EPERM,
 131       operation_not_supported =                 EOPNOTSUPP,
 132       operation_would_block =                   EWOULDBLOCK,
 133 #ifdef _GLIBCXX_HAVE_EOWNERDEAD
 134       owner_dead =                              EOWNERDEAD,
 135 #endif
 136       permission_denied =                       EACCES,
 137 #ifdef _GLIBCXX_HAVE_EPROTO
 138       protocol_error =                          EPROTO,
 139 #endif
 140       protocol_not_supported =                  EPROTONOSUPPORT,
 141       read_only_file_system =                   EROFS,
 142       resource_deadlock_would_occur =           EDEADLK,
 143       resource_unavailable_try_again =          EAGAIN,
 144       result_out_of_range =                     ERANGE,
 145 #ifdef _GLIBCXX_HAVE_ENOTRECOVERABLE
 146       state_not_recoverable =                   ENOTRECOVERABLE,
 147 #endif
 148
 149 #ifdef _GLIBCXX_HAVE_ETIME
 150       stream_timeout =                          ETIME,
 151 #endif
 152
 153       text_file_busy =                          ETXTBSY,
 154       timed_out =                               ETIMEDOUT,
 155       too_many_files_open_in_system =           ENFILE,
 156       too_many_files_open =                     EMFILE,
 157       too_many_links =                          EMLINK,
 158       too_many_synbolic_link_levels =           ELOOP,
 159       value_too_large =                         EOVERFLOW,
 160       wrong_protocol_type =                     EPROTOTYPE,
 161       no_posix_equivalent = 1L << 16
 162     };
 163
 164   struct error_category
 165   {
 166     error_category() { }
 167
 168     bool
 169     operator==(const error_category& __other) const
 170     { return this == &__other; }
 171
 172     bool
 173     operator!=(const error_category& __other) const
 174     { return this != &__other; }
 175
 176     virtual posix_errno
 177     posix(int __v) const = 0;
 178
 179     virtual const string&
 180     name() const = 0;
 181
 182   private:
 183     error_category(const error_category&);
 184
 185     error_category&
 186     operator=(const error_category&);
 187   };
 188
 189   struct error_code
 190   {
 191     error_code() throw()
 192     : _M_value(0), _M_cat(&system_category) { }
 193
 194     error_code(int __v, const error_category& __cat) throw()
 195     : _M_value(__v), _M_cat(&__cat) { }
 196
 197     error_code(posix_errno __v)
 198     : _M_value(__v), _M_cat(&system_category) { }
 199
 200     void
 201     assign(int __v, const error_category& __cat) throw()
 202     {
 203       _M_value = __v;
 204       _M_cat = &__cat;
 205     }
 206
 207     void
 208     clear() throw()
 209     {
 210       _M_value = 0;
 211       _M_cat = &system_category;
 212    }
 213
 214     int
 215     value() const throw() { return _M_value; }
 216
 217     const error_category&
 218     category() const { return *_M_cat; }
 219
 220     posix_errno
 221     posix() const throw() { return this->category().posix(_M_value); }
 222
 223     // Safe bool idiom.
 224     // explicit operator bool() const throw()
 225     // { return _M_value != 0; }
 226     typedef void (*__bool_type)();
 227
 228     static void __not_bool_type() { }
 229
 230     operator __bool_type() const throw()
 231     { return _M_value != 0 ? &__not_bool_type : false; }
 232
 233     bool operator==(const error_code& __other) const
 234     { return value() == __other.value() && category() == __other.category(); }
 235
 236     bool operator!=(const error_code& __other) const
 237     { return !(this == &__other); }
 238
 239   private:
 240     int                         _M_value;
 241     const error_category*       _M_cat;
 242   };
 243
 244   class system_error : public std::runtime_error
 245   {
 246   private:
 247     error_code  _M_code;
 248
 249   public:
 250     system_error(const string& __what, error_code __ec = error_code())
 251     : runtime_error(__what), _M_code(__ec) { }
 252
 253     system_error(const string& __what, int __v, const error_category& __ecat)
 254     : runtime_error(__what), _M_code(error_code(__v, __ecat)) { }
 255
 256     virtual ~system_error() throw();
 257
 258     const error_code&
 259     code() const throw() { return _M_code; }
 260   };
 261
 262 _GLIBCXX_END_NAMESPACE
 263
 264 #endif
 265