00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00029 #ifndef _GLIBCXX_SYSTEM_ERROR
00030 #define _GLIBCXX_SYSTEM_ERROR 1
00031
00032 #pragma GCC system_header
00033
00034 #ifndef __GXX_EXPERIMENTAL_CXX0X__
00035 # include <bits/c++0x_warning.h>
00036 #else
00037
00038 #include <bits/c++config.h>
00039 #include <bits/error_constants.h>
00040 #include <iosfwd>
00041 #include <stdexcept>
00042
00043 _GLIBCXX_BEGIN_NAMESPACE(std)
00044
00045 class error_code;
00046 class error_condition;
00047 class error_category;
00048 class system_error;
00049
00050
00051 template<typename _Tp>
00052 struct is_error_code_enum : public false_type { };
00053
00054
00055 template<typename _Tp>
00056 struct is_error_condition_enum : public false_type { };
00057
00058 template<>
00059 struct is_error_condition_enum<errc>
00060 : public true_type { };
00061
00062
00063
00064 class error_category
00065 {
00066 protected:
00067 error_category();
00068
00069 public:
00070 virtual ~error_category() { }
00071
00072 error_category(const error_category&) = delete;
00073 error_category& operator=(const error_category&) = delete;
00074
00075 virtual const char*
00076 name() const = 0;
00077
00078 virtual string
00079 message(int) const = 0;
00080
00081 virtual error_condition
00082 default_error_condition(int __i) const;
00083
00084 virtual bool
00085 equivalent(int __i, const error_condition& __cond) const;
00086
00087 virtual bool
00088 equivalent(const error_code& __code, int __i) const;
00089
00090 bool
00091 operator<(const error_category& __other) const
00092 { return less<const error_category*>()(this, &__other); }
00093
00094 bool
00095 operator==(const error_category& __other) const
00096 { return this == &__other; }
00097
00098 bool
00099 operator!=(const error_category& __other) const
00100 { return this != &__other; }
00101 };
00102
00103 inline error_category::error_category() = default;
00104
00105
00106 _GLIBCXX_CONST const error_category& system_category() throw();
00107 _GLIBCXX_CONST const error_category& generic_category() throw();
00108
00109 error_code make_error_code(errc);
00110
00111 template<typename _Tp>
00112 struct hash;
00113
00114
00115
00116 struct error_code
00117 {
00118 error_code()
00119 : _M_value(0), _M_cat(&system_category()) { }
00120
00121 error_code(int __v, const error_category& __cat)
00122 : _M_value(__v), _M_cat(&__cat) { }
00123
00124 template<typename _ErrorCodeEnum>
00125 error_code(_ErrorCodeEnum __e,
00126 typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value>::type* = 0)
00127 { *this = make_error_code(__e); }
00128
00129 void
00130 assign(int __v, const error_category& __cat)
00131 {
00132 _M_value = __v;
00133 _M_cat = &__cat;
00134 }
00135
00136 void
00137 clear()
00138 { assign(0, system_category()); }
00139
00140
00141 template<typename _ErrorCodeEnum>
00142 typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value,
00143 error_code&>::type
00144 operator=(_ErrorCodeEnum __e)
00145 { return *this = make_error_code(__e); }
00146
00147 int
00148 value() const { return _M_value; }
00149
00150 const error_category&
00151 category() const { return *_M_cat; }
00152
00153 error_condition
00154 default_error_condition() const;
00155
00156 string
00157 message() const
00158 { return category().message(value()); }
00159
00160 explicit operator bool() const
00161 { return _M_value != 0 ? true : false; }
00162
00163
00164 private:
00165 friend class hash<error_code>;
00166
00167 int _M_value;
00168 const error_category* _M_cat;
00169 };
00170
00171
00172 inline error_code
00173 make_error_code(errc __e)
00174 { return error_code(static_cast<int>(__e), generic_category()); }
00175
00176 inline bool
00177 operator<(const error_code& __lhs, const error_code& __rhs)
00178 {
00179 return (__lhs.category() < __rhs.category()
00180 || (__lhs.category() == __rhs.category()
00181 && __lhs.value() < __rhs.value()));
00182 }
00183
00184 template<typename _CharT, typename _Traits>
00185 basic_ostream<_CharT, _Traits>&
00186 operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
00187 { return (__os << __e.category().name() << ':' << __e.value()); }
00188
00189 error_condition make_error_condition(errc);
00190
00191
00192
00193 struct error_condition
00194 {
00195 error_condition()
00196 : _M_value(0), _M_cat(&generic_category()) { }
00197
00198 error_condition(int __v, const error_category& __cat)
00199 : _M_value(__v), _M_cat(&__cat) { }
00200
00201 template<typename _ErrorConditionEnum>
00202 error_condition(_ErrorConditionEnum __e,
00203 typename enable_if<is_error_condition_enum
00204 <_ErrorConditionEnum>::value>::type* = 0)
00205 { *this = make_error_condition(__e); }
00206
00207 void
00208 assign(int __v, const error_category& __cat)
00209 {
00210 _M_value = __v;
00211 _M_cat = &__cat;
00212 }
00213
00214
00215 template<typename _ErrorConditionEnum>
00216 typename enable_if<is_error_condition_enum
00217 <_ErrorConditionEnum>::value, error_condition&>::type
00218 operator=(_ErrorConditionEnum __e)
00219 { return *this = make_error_condition(__e); }
00220
00221 void
00222 clear()
00223 { assign(0, generic_category()); }
00224
00225
00226 int
00227 value() const { return _M_value; }
00228
00229 const error_category&
00230 category() const { return *_M_cat; }
00231
00232 string
00233 message() const
00234 { return category().message(value()); }
00235
00236 explicit operator bool() const
00237 { return _M_value != 0 ? true : false; }
00238
00239
00240 private:
00241 int _M_value;
00242 const error_category* _M_cat;
00243 };
00244
00245
00246 inline error_condition
00247 make_error_condition(errc __e)
00248 { return error_condition(static_cast<int>(__e), generic_category()); }
00249
00250 inline bool
00251 operator<(const error_condition& __lhs, const error_condition& __rhs)
00252 {
00253 return (__lhs.category() < __rhs.category()
00254 || (__lhs.category() == __rhs.category()
00255 && __lhs.value() < __rhs.value()));
00256 }
00257
00258
00259 inline bool
00260 operator==(const error_code& __lhs, const error_code& __rhs)
00261 { return (__lhs.category() == __rhs.category()
00262 && __lhs.value() == __rhs.value()); }
00263
00264 inline bool
00265 operator==(const error_code& __lhs, const error_condition& __rhs)
00266 {
00267 return (__lhs.category().equivalent(__lhs.value(), __rhs)
00268 || __rhs.category().equivalent(__lhs, __rhs.value()));
00269 }
00270
00271 inline bool
00272 operator==(const error_condition& __lhs, const error_code& __rhs)
00273 {
00274 return (__rhs.category().equivalent(__rhs.value(), __lhs)
00275 || __lhs.category().equivalent(__rhs, __lhs.value()));
00276 }
00277
00278 inline bool
00279 operator==(const error_condition& __lhs, const error_condition& __rhs)
00280 {
00281 return (__lhs.category() == __rhs.category()
00282 && __lhs.value() == __rhs.value());
00283 }
00284
00285 inline bool
00286 operator!=(const error_code& __lhs, const error_code& __rhs)
00287 { return !(__lhs == __rhs); }
00288
00289 inline bool
00290 operator!=(const error_code& __lhs, const error_condition& __rhs)
00291 { return !(__lhs == __rhs); }
00292
00293 inline bool
00294 operator!=(const error_condition& __lhs, const error_code& __rhs)
00295 { return !(__lhs == __rhs); }
00296
00297 inline bool
00298 operator!=(const error_condition& __lhs, const error_condition& __rhs)
00299 { return !(__lhs == __rhs); }
00300
00301
00302
00303
00304
00305
00306
00307 class system_error : public std::runtime_error
00308 {
00309 private:
00310 error_code _M_code;
00311
00312 public:
00313 system_error(error_code __ec = error_code())
00314 : runtime_error(""), _M_code(__ec) { }
00315
00316 system_error(error_code __ec, const string& __what)
00317 : runtime_error(__what), _M_code(__ec) { }
00318
00319
00320
00321
00322
00323
00324
00325
00326
00327
00328
00329 system_error(int __v, const error_category& __ecat)
00330 : runtime_error(""), _M_code(error_code(__v, __ecat)) { }
00331
00332 system_error(int __v, const error_category& __ecat, const string& __what)
00333 : runtime_error(__what), _M_code(error_code(__v, __ecat)) { }
00334
00335 virtual ~system_error() throw();
00336
00337 const error_code&
00338 code() const throw() { return _M_code; }
00339 };
00340
00341 _GLIBCXX_END_NAMESPACE
00342
00343 #ifndef _GLIBCXX_COMPATIBILITY_CXX0X
00344
00345 #include <bits/functional_hash.h>
00346
00347 _GLIBCXX_BEGIN_NAMESPACE(std)
00348
00349
00350
00351 template<>
00352 struct hash<error_code>
00353 : public std::unary_function<error_code, size_t>
00354 {
00355 size_t
00356 operator()(const error_code& __e) const
00357 {
00358 const size_t __tmp = std::_Fnv_hash::hash(__e._M_value);
00359 return std::_Fnv_hash::__hash_combine(__e._M_cat, __tmp);
00360 }
00361 };
00362
00363 _GLIBCXX_END_NAMESPACE
00364
00365 #endif // _GLIBCXX_COMPATIBILITY_CXX0X
00366
00367 #endif // __GXX_EXPERIMENTAL_CXX0X__
00368
00369 #endif // _GLIBCXX_SYSTEM_ERROR
00370