| // -*- C++ -*- |
| //===---------------------------- system_error ----------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP_SYSTEM_ERROR |
| #define _LIBCPP_SYSTEM_ERROR |
| |
| /* |
| system_error synopsis |
| |
| namespace std |
| { |
| |
| class error_category |
| { |
| public: |
| virtual ~error_category() noexcept; |
| |
| constexpr error_category(); |
| error_category(const error_category&) = delete; |
| error_category& operator=(const error_category&) = delete; |
| |
| virtual const char* name() const noexcept = 0; |
| virtual error_condition default_error_condition(int ev) const noexcept; |
| virtual bool equivalent(int code, const error_condition& condition) const noexcept; |
| virtual bool equivalent(const error_code& code, int condition) const noexcept; |
| virtual string message(int ev) const = 0; |
| |
| bool operator==(const error_category& rhs) const noexcept; |
| bool operator!=(const error_category& rhs) const noexcept; |
| bool operator<(const error_category& rhs) const noexcept; |
| }; |
| |
| const error_category& generic_category() noexcept; |
| const error_category& system_category() noexcept; |
| |
| template <class T> struct is_error_code_enum |
| : public false_type {}; |
| |
| template <class T> struct is_error_condition_enum |
| : public false_type {}; |
| |
| class error_code |
| { |
| public: |
| // constructors: |
| error_code() noexcept; |
| error_code(int val, const error_category& cat) noexcept; |
| template <class ErrorCodeEnum> |
| error_code(ErrorCodeEnum e) noexcept; |
| |
| // modifiers: |
| void assign(int val, const error_category& cat) noexcept; |
| template <class ErrorCodeEnum> |
| error_code& operator=(ErrorCodeEnum e) noexcept; |
| void clear() noexcept; |
| |
| // observers: |
| int value() const noexcept; |
| const error_category& category() const noexcept; |
| error_condition default_error_condition() const noexcept; |
| string message() const; |
| explicit operator bool() const noexcept; |
| }; |
| |
| // non-member functions: |
| bool operator<(const error_code& lhs, const error_code& rhs) noexcept; |
| template <class charT, class traits> |
| basic_ostream<charT,traits>& |
| operator<<(basic_ostream<charT,traits>& os, const error_code& ec); |
| |
| class error_condition |
| { |
| public: |
| // constructors: |
| error_condition() noexcept; |
| error_condition(int val, const error_category& cat) noexcept; |
| template <class ErrorConditionEnum> |
| error_condition(ErrorConditionEnum e) noexcept; |
| |
| // modifiers: |
| void assign(int val, const error_category& cat) noexcept; |
| template <class ErrorConditionEnum> |
| error_condition& operator=(ErrorConditionEnum e) noexcept; |
| void clear() noexcept; |
| |
| // observers: |
| int value() const noexcept; |
| const error_category& category() const noexcept; |
| string message() const noexcept; |
| explicit operator bool() const noexcept; |
| }; |
| |
| bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept; |
| |
| class system_error |
| : public runtime_error |
| { |
| public: |
| system_error(error_code ec, const string& what_arg); |
| system_error(error_code ec, const char* what_arg); |
| system_error(error_code ec); |
| system_error(int ev, const error_category& ecat, const string& what_arg); |
| system_error(int ev, const error_category& ecat, const char* what_arg); |
| system_error(int ev, const error_category& ecat); |
| |
| const error_code& code() const noexcept; |
| const char* what() const noexcept; |
| }; |
| |
| enum class errc |
| { |
| address_family_not_supported, // EAFNOSUPPORT |
| address_in_use, // EADDRINUSE |
| address_not_available, // EADDRNOTAVAIL |
| already_connected, // EISCONN |
| argument_list_too_long, // E2BIG |
| argument_out_of_domain, // EDOM |
| bad_address, // EFAULT |
| bad_file_descriptor, // EBADF |
| bad_message, // EBADMSG |
| broken_pipe, // EPIPE |
| connection_aborted, // ECONNABORTED |
| connection_already_in_progress, // EALREADY |
| connection_refused, // ECONNREFUSED |
| connection_reset, // ECONNRESET |
| cross_device_link, // EXDEV |
| destination_address_required, // EDESTADDRREQ |
| device_or_resource_busy, // EBUSY |
| directory_not_empty, // ENOTEMPTY |
| executable_format_error, // ENOEXEC |
| file_exists, // EEXIST |
| file_too_large, // EFBIG |
| filename_too_long, // ENAMETOOLONG |
| function_not_supported, // ENOSYS |
| host_unreachable, // EHOSTUNREACH |
| identifier_removed, // EIDRM |
| illegal_byte_sequence, // EILSEQ |
| inappropriate_io_control_operation, // ENOTTY |
| interrupted, // EINTR |
| invalid_argument, // EINVAL |
| invalid_seek, // ESPIPE |
| io_error, // EIO |
| is_a_directory, // EISDIR |
| message_size, // EMSGSIZE |
| network_down, // ENETDOWN |
| network_reset, // ENETRESET |
| network_unreachable, // ENETUNREACH |
| no_buffer_space, // ENOBUFS |
| no_child_process, // ECHILD |
| no_link, // ENOLINK |
| no_lock_available, // ENOLCK |
| no_message_available, // ENODATA |
| no_message, // ENOMSG |
| no_protocol_option, // ENOPROTOOPT |
| no_space_on_device, // ENOSPC |
| no_stream_resources, // ENOSR |
| no_such_device_or_address, // ENXIO |
| no_such_device, // ENODEV |
| no_such_file_or_directory, // ENOENT |
| no_such_process, // ESRCH |
| not_a_directory, // ENOTDIR |
| not_a_socket, // ENOTSOCK |
| not_a_stream, // ENOSTR |
| not_connected, // ENOTCONN |
| not_enough_memory, // ENOMEM |
| not_supported, // ENOTSUP |
| operation_canceled, // ECANCELED |
| operation_in_progress, // EINPROGRESS |
| operation_not_permitted, // EPERM |
| operation_not_supported, // EOPNOTSUPP |
| operation_would_block, // EWOULDBLOCK |
| owner_dead, // EOWNERDEAD |
| permission_denied, // EACCES |
| protocol_error, // EPROTO |
| protocol_not_supported, // EPROTONOSUPPORT |
| read_only_file_system, // EROFS |
| resource_deadlock_would_occur, // EDEADLK |
| resource_unavailable_try_again, // EAGAIN |
| result_out_of_range, // ERANGE |
| state_not_recoverable, // ENOTRECOVERABLE |
| stream_timeout, // ETIME |
| text_file_busy, // ETXTBSY |
| timed_out, // ETIMEDOUT |
| too_many_files_open_in_system, // ENFILE |
| too_many_files_open, // EMFILE |
| too_many_links, // EMLINK |
| too_many_symbolic_link_levels, // ELOOP |
| value_too_large, // EOVERFLOW |
| wrong_protocol_type // EPROTOTYPE |
| }; |
| |
| template <> struct is_error_condition_enum<errc> |
| : true_type { } |
| |
| error_code make_error_code(errc e) noexcept; |
| error_condition make_error_condition(errc e) noexcept; |
| |
| // Comparison operators: |
| bool operator==(const error_code& lhs, const error_code& rhs) noexcept; |
| bool operator==(const error_code& lhs, const error_condition& rhs) noexcept; |
| bool operator==(const error_condition& lhs, const error_code& rhs) noexcept; |
| bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept; |
| bool operator!=(const error_code& lhs, const error_code& rhs) noexcept; |
| bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept; |
| bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept; |
| bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept; |
| |
| template <> struct hash<std::error_code>; |
| |
| } // std |
| |
| */ |
| |
| #include <__config> |
| #include <cerrno> |
| #include <type_traits> |
| #include <stdexcept> |
| #include <__functional_base> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // is_error_code_enum |
| |
| template <class _Tp> |
| struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum |
| : public false_type {}; |
| |
| // is_error_condition_enum |
| |
| template <class _Tp> |
| struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum |
| : public false_type {}; |
| |
| // Some error codes are not present on all platforms, so we provide equivalents |
| // for them: |
| |
| //enum class errc |
| _LIBCPP_DECLARE_STRONG_ENUM(errc) |
| { |
| address_family_not_supported = EAFNOSUPPORT, |
| address_in_use = EADDRINUSE, |
| address_not_available = EADDRNOTAVAIL, |
| already_connected = EISCONN, |
| argument_list_too_long = E2BIG, |
| argument_out_of_domain = EDOM, |
| bad_address = EFAULT, |
| bad_file_descriptor = EBADF, |
| bad_message = EBADMSG, |
| broken_pipe = EPIPE, |
| connection_aborted = ECONNABORTED, |
| connection_already_in_progress = EALREADY, |
| connection_refused = ECONNREFUSED, |
| connection_reset = ECONNRESET, |
| cross_device_link = EXDEV, |
| destination_address_required = EDESTADDRREQ, |
| device_or_resource_busy = EBUSY, |
| directory_not_empty = ENOTEMPTY, |
| executable_format_error = ENOEXEC, |
| file_exists = EEXIST, |
| file_too_large = EFBIG, |
| filename_too_long = ENAMETOOLONG, |
| function_not_supported = ENOSYS, |
| host_unreachable = EHOSTUNREACH, |
| identifier_removed = EIDRM, |
| illegal_byte_sequence = EILSEQ, |
| inappropriate_io_control_operation = ENOTTY, |
| interrupted = EINTR, |
| invalid_argument = EINVAL, |
| invalid_seek = ESPIPE, |
| io_error = EIO, |
| is_a_directory = EISDIR, |
| message_size = EMSGSIZE, |
| network_down = ENETDOWN, |
| network_reset = ENETRESET, |
| network_unreachable = ENETUNREACH, |
| no_buffer_space = ENOBUFS, |
| no_child_process = ECHILD, |
| no_link = ENOLINK, |
| no_lock_available = ENOLCK, |
| #ifdef ENODATA |
| no_message_available = ENODATA, |
| #else |
| no_message_available = ENOMSG, |
| #endif |
| no_message = ENOMSG, |
| no_protocol_option = ENOPROTOOPT, |
| no_space_on_device = ENOSPC, |
| #ifdef ENOSR |
| no_stream_resources = ENOSR, |
| #else |
| no_stream_resources = ENOMEM, |
| #endif |
| no_such_device_or_address = ENXIO, |
| no_such_device = ENODEV, |
| no_such_file_or_directory = ENOENT, |
| no_such_process = ESRCH, |
| not_a_directory = ENOTDIR, |
| not_a_socket = ENOTSOCK, |
| #ifdef ENOSTR |
| not_a_stream = ENOSTR, |
| #else |
| not_a_stream = EINVAL, |
| #endif |
| not_connected = ENOTCONN, |
| not_enough_memory = ENOMEM, |
| not_supported = ENOTSUP, |
| operation_canceled = ECANCELED, |
| operation_in_progress = EINPROGRESS, |
| operation_not_permitted = EPERM, |
| operation_not_supported = EOPNOTSUPP, |
| operation_would_block = EWOULDBLOCK, |
| owner_dead = EOWNERDEAD, |
| permission_denied = EACCES, |
| protocol_error = EPROTO, |
| protocol_not_supported = EPROTONOSUPPORT, |
| read_only_file_system = EROFS, |
| resource_deadlock_would_occur = EDEADLK, |
| resource_unavailable_try_again = EAGAIN, |
| result_out_of_range = ERANGE, |
| state_not_recoverable = ENOTRECOVERABLE, |
| #ifdef ETIME |
| stream_timeout = ETIME, |
| #else |
| stream_timeout = ETIMEDOUT, |
| #endif |
| text_file_busy = ETXTBSY, |
| timed_out = ETIMEDOUT, |
| too_many_files_open_in_system = ENFILE, |
| too_many_files_open = EMFILE, |
| too_many_links = EMLINK, |
| too_many_symbolic_link_levels = ELOOP, |
| value_too_large = EOVERFLOW, |
| wrong_protocol_type = EPROTOTYPE |
| }; |
| _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(errc) |
| |
| template <> |
| struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc> |
| : true_type { }; |
| |
| #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS |
| template <> |
| struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc::__lx> |
| : true_type { }; |
| #endif |
| |
| class _LIBCPP_TYPE_VIS error_condition; |
| class _LIBCPP_TYPE_VIS error_code; |
| |
| // class error_category |
| |
| class _LIBCPP_HIDDEN __do_message; |
| |
| class _LIBCPP_TYPE_VIS error_category |
| { |
| public: |
| virtual ~error_category() _NOEXCEPT; |
| |
| #ifdef _LIBCPP_BUILDING_SYSTEM_ERROR |
| error_category() _NOEXCEPT; |
| #else |
| _LIBCPP_ALWAYS_INLINE |
| _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT; |
| #endif |
| private: |
| error_category(const error_category&);// = delete; |
| error_category& operator=(const error_category&);// = delete; |
| |
| public: |
| virtual const char* name() const _NOEXCEPT = 0; |
| virtual error_condition default_error_condition(int __ev) const _NOEXCEPT; |
| virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT; |
| virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT; |
| virtual string message(int __ev) const = 0; |
| |
| _LIBCPP_ALWAYS_INLINE |
| bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);} |
| |
| _LIBCPP_ALWAYS_INLINE |
| bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;} |
| |
| friend class _LIBCPP_HIDDEN __do_message; |
| }; |
| |
| class _LIBCPP_HIDDEN __do_message |
| : public error_category |
| { |
| public: |
| virtual string message(int ev) const; |
| }; |
| |
| _LIBCPP_FUNC_VIS const error_category& generic_category() _NOEXCEPT; |
| _LIBCPP_FUNC_VIS const error_category& system_category() _NOEXCEPT; |
| |
| class _LIBCPP_TYPE_VIS error_condition |
| { |
| int __val_; |
| const error_category* __cat_; |
| public: |
| _LIBCPP_ALWAYS_INLINE |
| error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {} |
| |
| _LIBCPP_ALWAYS_INLINE |
| error_condition(int __val, const error_category& __cat) _NOEXCEPT |
| : __val_(__val), __cat_(&__cat) {} |
| |
| template <class _Ep> |
| _LIBCPP_ALWAYS_INLINE |
| error_condition(_Ep __e, |
| typename enable_if<is_error_condition_enum<_Ep>::value>::type* = 0 |
| ) _NOEXCEPT |
| {*this = make_error_condition(__e);} |
| |
| _LIBCPP_ALWAYS_INLINE |
| void assign(int __val, const error_category& __cat) _NOEXCEPT |
| { |
| __val_ = __val; |
| __cat_ = &__cat; |
| } |
| |
| template <class _Ep> |
| _LIBCPP_ALWAYS_INLINE |
| typename enable_if |
| < |
| is_error_condition_enum<_Ep>::value, |
| error_condition& |
| >::type |
| operator=(_Ep __e) _NOEXCEPT |
| {*this = make_error_condition(__e); return *this;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| void clear() _NOEXCEPT |
| { |
| __val_ = 0; |
| __cat_ = &generic_category(); |
| } |
| |
| _LIBCPP_ALWAYS_INLINE |
| int value() const _NOEXCEPT {return __val_;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| const error_category& category() const _NOEXCEPT {return *__cat_;} |
| string message() const; |
| |
| _LIBCPP_ALWAYS_INLINE |
| _LIBCPP_EXPLICIT |
| operator bool() const _NOEXCEPT {return __val_ != 0;} |
| }; |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| error_condition |
| make_error_condition(errc __e) _NOEXCEPT |
| { |
| return error_condition(static_cast<int>(__e), generic_category()); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT |
| { |
| return __x.category() < __y.category() |
| || (__x.category() == __y.category() && __x.value() < __y.value()); |
| } |
| |
| // error_code |
| |
| class _LIBCPP_TYPE_VIS error_code |
| { |
| int __val_; |
| const error_category* __cat_; |
| public: |
| _LIBCPP_ALWAYS_INLINE |
| error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {} |
| |
| _LIBCPP_ALWAYS_INLINE |
| error_code(int __val, const error_category& __cat) _NOEXCEPT |
| : __val_(__val), __cat_(&__cat) {} |
| |
| template <class _Ep> |
| _LIBCPP_ALWAYS_INLINE |
| error_code(_Ep __e, |
| typename enable_if<is_error_code_enum<_Ep>::value>::type* = 0 |
| ) _NOEXCEPT |
| {*this = make_error_code(__e);} |
| |
| _LIBCPP_ALWAYS_INLINE |
| void assign(int __val, const error_category& __cat) _NOEXCEPT |
| { |
| __val_ = __val; |
| __cat_ = &__cat; |
| } |
| |
| template <class _Ep> |
| _LIBCPP_ALWAYS_INLINE |
| typename enable_if |
| < |
| is_error_code_enum<_Ep>::value, |
| error_code& |
| >::type |
| operator=(_Ep __e) _NOEXCEPT |
| {*this = make_error_code(__e); return *this;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| void clear() _NOEXCEPT |
| { |
| __val_ = 0; |
| __cat_ = &system_category(); |
| } |
| |
| _LIBCPP_ALWAYS_INLINE |
| int value() const _NOEXCEPT {return __val_;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| const error_category& category() const _NOEXCEPT {return *__cat_;} |
| |
| _LIBCPP_ALWAYS_INLINE |
| error_condition default_error_condition() const _NOEXCEPT |
| {return __cat_->default_error_condition(__val_);} |
| |
| string message() const; |
| |
| _LIBCPP_ALWAYS_INLINE |
| _LIBCPP_EXPLICIT |
| operator bool() const _NOEXCEPT {return __val_ != 0;} |
| }; |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| error_code |
| make_error_code(errc __e) _NOEXCEPT |
| { |
| return error_code(static_cast<int>(__e), generic_category()); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator<(const error_code& __x, const error_code& __y) _NOEXCEPT |
| { |
| return __x.category() < __y.category() |
| || (__x.category() == __y.category() && __x.value() < __y.value()); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator==(const error_code& __x, const error_code& __y) _NOEXCEPT |
| { |
| return __x.category() == __y.category() && __x.value() == __y.value(); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator==(const error_code& __x, const error_condition& __y) _NOEXCEPT |
| { |
| return __x.category().equivalent(__x.value(), __y) |
| || __y.category().equivalent(__x, __y.value()); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator==(const error_condition& __x, const error_code& __y) _NOEXCEPT |
| { |
| return __y == __x; |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT |
| { |
| return __x.category() == __y.category() && __x.value() == __y.value(); |
| } |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator!=(const error_code& __x, const error_code& __y) _NOEXCEPT |
| {return !(__x == __y);} |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator!=(const error_code& __x, const error_condition& __y) _NOEXCEPT |
| {return !(__x == __y);} |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator!=(const error_condition& __x, const error_code& __y) _NOEXCEPT |
| {return !(__x == __y);} |
| |
| inline _LIBCPP_INLINE_VISIBILITY |
| bool |
| operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT |
| {return !(__x == __y);} |
| |
| template <> |
| struct _LIBCPP_TYPE_VIS_ONLY hash<error_code> |
| : public unary_function<error_code, size_t> |
| { |
| _LIBCPP_INLINE_VISIBILITY |
| size_t operator()(const error_code& __ec) const _NOEXCEPT |
| { |
| return static_cast<size_t>(__ec.value()); |
| } |
| }; |
| |
| // system_error |
| |
| class _LIBCPP_TYPE_VIS system_error |
| : public runtime_error |
| { |
| error_code __ec_; |
| public: |
| system_error(error_code __ec, const string& __what_arg); |
| system_error(error_code __ec, const char* __what_arg); |
| system_error(error_code __ec); |
| system_error(int __ev, const error_category& __ecat, const string& __what_arg); |
| system_error(int __ev, const error_category& __ecat, const char* __what_arg); |
| system_error(int __ev, const error_category& __ecat); |
| ~system_error() _NOEXCEPT; |
| |
| _LIBCPP_ALWAYS_INLINE |
| const error_code& code() const _NOEXCEPT {return __ec_;} |
| |
| private: |
| static string __init(const error_code&, string); |
| }; |
| |
| _LIBCPP_FUNC_VIS void __throw_system_error(int ev, const char* what_arg); |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_SYSTEM_ERROR |
