1e15fd1856
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@132137 91177308-0d34-0410-b5e6-96231b3b80d8
642 lines
21 KiB
C++
642 lines
21 KiB
C++
// -*- C++ -*-
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//===---------------------------- system_error ----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_SYSTEM_ERROR
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#define _LIBCPP_SYSTEM_ERROR
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/*
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system_error synopsis
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namespace std
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{
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class error_category
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{
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public:
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virtual ~error_category() noexcept;
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error_category(const error_category&) = delete;
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error_category& operator=(const error_category&) = delete;
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virtual const char* name() const noexcept = 0;
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virtual error_condition default_error_condition(int ev) const noexcept;
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virtual bool equivalent(int code, const error_condition& condition) const noexcept;
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virtual bool equivalent(const error_code& code, int condition) const noexcept;
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virtual string message(int ev) const = 0;
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bool operator==(const error_category& rhs) const noexcept;
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bool operator!=(const error_category& rhs) const noexcept;
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bool operator<(const error_category& rhs) const noexcept;
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};
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const error_category& generic_category() noexcept;
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const error_category& system_category() noexcept;
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template <class T> struct is_error_code_enum
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: public false_type {};
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template <class T> struct is_error_condition_enum
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: public false_type {};
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class error_code
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{
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public:
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// constructors:
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error_code() noexcept;
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error_code(int val, const error_category& cat) noexcept;
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template <class ErrorCodeEnum>
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error_code(ErrorCodeEnum e) noexcept;
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// modifiers:
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void assign(int val, const error_category& cat) noexcept;
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template <class ErrorCodeEnum>
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error_code& operator=(ErrorCodeEnum e) noexcept;
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void clear() noexcept;
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// observers:
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int value() const noexcept;
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const error_category& category() const noexcept;
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error_condition default_error_condition() const noexcept;
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string message() const;
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explicit operator bool() const noexcept;
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};
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// non-member functions:
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bool operator<(const error_code& lhs, const error_code& rhs) noexcept;
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template <class charT, class traits>
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basic_ostream<charT,traits>&
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operator<<(basic_ostream<charT,traits>& os, const error_code& ec);
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class error_condition
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{
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public:
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// constructors:
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error_condition() noexcept;
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error_condition(int val, const error_category& cat) noexcept;
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template <class ErrorConditionEnum>
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error_condition(ErrorConditionEnum e) noexcept;
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// modifiers:
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void assign(int val, const error_category& cat) noexcept;
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template <class ErrorConditionEnum>
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error_condition& operator=(ErrorConditionEnum e) noexcept;
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void clear() noexcept;
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// observers:
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int value() const noexcept;
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const error_category& category() const noexcept;
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string message() const noexcept;
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explicit operator bool() const noexcept;
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};
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bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept;
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class system_error
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: public runtime_error
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{
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public:
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system_error(error_code ec, const string& what_arg);
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system_error(error_code ec, const char* what_arg);
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system_error(error_code ec);
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system_error(int ev, const error_category& ecat, const string& what_arg);
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system_error(int ev, const error_category& ecat, const char* what_arg);
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system_error(int ev, const error_category& ecat);
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const error_code& code() const noexcept;
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const char* what() const noexcept;
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};
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enum class errc
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{
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address_family_not_supported, // EAFNOSUPPORT
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address_in_use, // EADDRINUSE
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address_not_available, // EADDRNOTAVAIL
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already_connected, // EISCONN
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argument_list_too_long, // E2BIG
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argument_out_of_domain, // EDOM
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bad_address, // EFAULT
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bad_file_descriptor, // EBADF
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bad_message, // EBADMSG
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broken_pipe, // EPIPE
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connection_aborted, // ECONNABORTED
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connection_already_in_progress, // EALREADY
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connection_refused, // ECONNREFUSED
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connection_reset, // ECONNRESET
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cross_device_link, // EXDEV
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destination_address_required, // EDESTADDRREQ
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device_or_resource_busy, // EBUSY
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directory_not_empty, // ENOTEMPTY
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executable_format_error, // ENOEXEC
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file_exists, // EEXIST
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file_too_large, // EFBIG
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filename_too_long, // ENAMETOOLONG
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function_not_supported, // ENOSYS
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host_unreachable, // EHOSTUNREACH
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identifier_removed, // EIDRM
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illegal_byte_sequence, // EILSEQ
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inappropriate_io_control_operation, // ENOTTY
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interrupted, // EINTR
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invalid_argument, // EINVAL
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invalid_seek, // ESPIPE
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io_error, // EIO
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is_a_directory, // EISDIR
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message_size, // EMSGSIZE
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network_down, // ENETDOWN
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network_reset, // ENETRESET
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network_unreachable, // ENETUNREACH
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no_buffer_space, // ENOBUFS
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no_child_process, // ECHILD
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no_link, // ENOLINK
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no_lock_available, // ENOLCK
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no_message_available, // ENODATA
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no_message, // ENOMSG
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no_protocol_option, // ENOPROTOOPT
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no_space_on_device, // ENOSPC
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no_stream_resources, // ENOSR
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no_such_device_or_address, // ENXIO
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no_such_device, // ENODEV
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no_such_file_or_directory, // ENOENT
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no_such_process, // ESRCH
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not_a_directory, // ENOTDIR
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not_a_socket, // ENOTSOCK
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not_a_stream, // ENOSTR
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not_connected, // ENOTCONN
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not_enough_memory, // ENOMEM
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not_supported, // ENOTSUP
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operation_canceled, // ECANCELED
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operation_in_progress, // EINPROGRESS
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operation_not_permitted, // EPERM
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operation_not_supported, // EOPNOTSUPP
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operation_would_block, // EWOULDBLOCK
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owner_dead, // EOWNERDEAD
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permission_denied, // EACCES
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protocol_error, // EPROTO
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protocol_not_supported, // EPROTONOSUPPORT
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read_only_file_system, // EROFS
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resource_deadlock_would_occur, // EDEADLK
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resource_unavailable_try_again, // EAGAIN
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result_out_of_range, // ERANGE
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state_not_recoverable, // ENOTRECOVERABLE
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stream_timeout, // ETIME
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text_file_busy, // ETXTBSY
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timed_out, // ETIMEDOUT
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too_many_files_open_in_system, // ENFILE
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too_many_files_open, // EMFILE
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too_many_links, // EMLINK
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too_many_symbolic_link_levels, // ELOOP
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value_too_large, // EOVERFLOW
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wrong_protocol_type // EPROTOTYPE
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};
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template <> struct is_error_condition_enum<errc>
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: true_type { }
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error_code make_error_code(errc e) noexcept;
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error_condition make_error_condition(errc e) noexcept;
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// Comparison operators:
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bool operator==(const error_code& lhs, const error_code& rhs) noexcept;
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bool operator==(const error_code& lhs, const error_condition& rhs) noexcept;
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bool operator==(const error_condition& lhs, const error_code& rhs) noexcept;
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bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept;
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bool operator!=(const error_code& lhs, const error_code& rhs) noexcept;
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bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept;
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bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept;
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bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept;
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template <> struct hash<std::error_code>;
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} // std
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*/
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#include <__config>
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#include <cerrno>
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#include <type_traits>
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#include <stdexcept>
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#include <__functional_base>
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#pragma GCC system_header
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_LIBCPP_BEGIN_NAMESPACE_STD
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// is_error_code_enum
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template <class _Tp>
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struct _LIBCPP_VISIBLE is_error_code_enum
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: public false_type {};
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// is_error_condition_enum
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template <class _Tp>
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struct _LIBCPP_VISIBLE is_error_condition_enum
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: public false_type {};
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// Some error codes are not present on all platforms, so we provide equivalents
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// for them:
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//enum class errc
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struct errc
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{
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enum _ {
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address_family_not_supported = EAFNOSUPPORT,
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address_in_use = EADDRINUSE,
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address_not_available = EADDRNOTAVAIL,
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already_connected = EISCONN,
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argument_list_too_long = E2BIG,
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argument_out_of_domain = EDOM,
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bad_address = EFAULT,
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bad_file_descriptor = EBADF,
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bad_message = EBADMSG,
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broken_pipe = EPIPE,
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connection_aborted = ECONNABORTED,
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connection_already_in_progress = EALREADY,
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connection_refused = ECONNREFUSED,
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connection_reset = ECONNRESET,
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cross_device_link = EXDEV,
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destination_address_required = EDESTADDRREQ,
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device_or_resource_busy = EBUSY,
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directory_not_empty = ENOTEMPTY,
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executable_format_error = ENOEXEC,
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file_exists = EEXIST,
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file_too_large = EFBIG,
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filename_too_long = ENAMETOOLONG,
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function_not_supported = ENOSYS,
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host_unreachable = EHOSTUNREACH,
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identifier_removed = EIDRM,
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illegal_byte_sequence = EILSEQ,
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inappropriate_io_control_operation = ENOTTY,
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interrupted = EINTR,
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invalid_argument = EINVAL,
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invalid_seek = ESPIPE,
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io_error = EIO,
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is_a_directory = EISDIR,
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message_size = EMSGSIZE,
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network_down = ENETDOWN,
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network_reset = ENETRESET,
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network_unreachable = ENETUNREACH,
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no_buffer_space = ENOBUFS,
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no_child_process = ECHILD,
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no_link = ENOLINK,
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no_lock_available = ENOLCK,
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#ifdef ENODATA
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no_message_available = ENODATA,
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#else
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no_message_available = ENOMSG,
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#endif
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no_message = ENOMSG,
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no_protocol_option = ENOPROTOOPT,
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no_space_on_device = ENOSPC,
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#ifdef ENOSR
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no_stream_resources = ENOSR,
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#else
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no_stream_resources = ENOMEM,
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#endif
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no_such_device_or_address = ENXIO,
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no_such_device = ENODEV,
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no_such_file_or_directory = ENOENT,
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no_such_process = ESRCH,
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not_a_directory = ENOTDIR,
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not_a_socket = ENOTSOCK,
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#ifdef ENOSTR
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not_a_stream = ENOSTR,
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#else
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not_a_stream = EINVAL,
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#endif
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not_connected = ENOTCONN,
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not_enough_memory = ENOMEM,
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not_supported = ENOTSUP,
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operation_canceled = ECANCELED,
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operation_in_progress = EINPROGRESS,
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operation_not_permitted = EPERM,
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operation_not_supported = EOPNOTSUPP,
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operation_would_block = EWOULDBLOCK,
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owner_dead = EOWNERDEAD,
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permission_denied = EACCES,
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protocol_error = EPROTO,
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protocol_not_supported = EPROTONOSUPPORT,
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read_only_file_system = EROFS,
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resource_deadlock_would_occur = EDEADLK,
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resource_unavailable_try_again = EAGAIN,
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result_out_of_range = ERANGE,
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state_not_recoverable = ENOTRECOVERABLE,
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#ifdef ETIME
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stream_timeout = ETIME,
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#else
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stream_timeout = ETIMEDOUT,
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#endif
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text_file_busy = ETXTBSY,
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timed_out = ETIMEDOUT,
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too_many_files_open_in_system = ENFILE,
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too_many_files_open = EMFILE,
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too_many_links = EMLINK,
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too_many_symbolic_link_levels = ELOOP,
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value_too_large = EOVERFLOW,
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wrong_protocol_type = EPROTOTYPE
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};
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_ __v_;
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_LIBCPP_ALWAYS_INLINE
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errc(_ __v) : __v_(__v) {}
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_LIBCPP_ALWAYS_INLINE
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operator int() const {return __v_;}
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};
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template <>
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struct _LIBCPP_VISIBLE is_error_condition_enum<errc>
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: true_type { };
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template <>
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struct _LIBCPP_VISIBLE is_error_condition_enum<errc::_>
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: true_type { };
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class error_condition;
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class error_code;
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// class error_category
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class __do_message;
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class _LIBCPP_VISIBLE error_category
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{
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public:
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virtual ~error_category() _NOEXCEPT;
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private:
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error_category() _NOEXCEPT;
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error_category(const error_category&);// = delete;
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error_category& operator=(const error_category&);// = delete;
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public:
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virtual const char* name() const _NOEXCEPT = 0;
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virtual error_condition default_error_condition(int __ev) const _NOEXCEPT;
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virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT;
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virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT;
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virtual string message(int __ev) const = 0;
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_LIBCPP_ALWAYS_INLINE
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bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}
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_LIBCPP_ALWAYS_INLINE
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bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}
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_LIBCPP_ALWAYS_INLINE
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bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}
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friend class __do_message;
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};
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class _LIBCPP_HIDDEN __do_message
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: public error_category
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{
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public:
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virtual string message(int ev) const;
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};
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const error_category& generic_category() _NOEXCEPT;
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const error_category& system_category() _NOEXCEPT;
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class _LIBCPP_VISIBLE error_condition
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{
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int __val_;
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const error_category* __cat_;
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public:
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_LIBCPP_ALWAYS_INLINE
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error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {}
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_LIBCPP_ALWAYS_INLINE
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error_condition(int __val, const error_category& __cat) _NOEXCEPT
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: __val_(__val), __cat_(&__cat) {}
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template <class _E>
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_LIBCPP_ALWAYS_INLINE
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error_condition(_E __e,
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typename enable_if<is_error_condition_enum<_E>::value>::type* = 0
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) _NOEXCEPT
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{*this = make_error_condition(__e);}
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_LIBCPP_ALWAYS_INLINE
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void assign(int __val, const error_category& __cat) _NOEXCEPT
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{
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__val_ = __val;
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__cat_ = &__cat;
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}
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template <class _E>
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_LIBCPP_ALWAYS_INLINE
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typename enable_if
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<
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is_error_condition_enum<_E>::value,
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error_condition&
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>::type
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operator=(_E __e) _NOEXCEPT
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{*this = make_error_condition(__e); return *this;}
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_LIBCPP_ALWAYS_INLINE
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void clear() _NOEXCEPT
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{
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__val_ = 0;
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__cat_ = &generic_category();
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}
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_LIBCPP_ALWAYS_INLINE
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int value() const _NOEXCEPT {return __val_;}
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_LIBCPP_ALWAYS_INLINE
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const error_category& category() const _NOEXCEPT {return *__cat_;}
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string message() const;
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_LIBCPP_ALWAYS_INLINE
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//explicit
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operator bool() const _NOEXCEPT {return __val_ != 0;}
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};
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inline _LIBCPP_INLINE_VISIBILITY
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error_condition
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make_error_condition(errc __e) _NOEXCEPT
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{
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return error_condition(static_cast<int>(__e), generic_category());
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}
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inline _LIBCPP_INLINE_VISIBILITY
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bool
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operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT
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{
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return __x.category() < __y.category()
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|| __x.category() == __y.category() && __x.value() < __y.value();
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}
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// error_code
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class _LIBCPP_VISIBLE error_code
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{
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int __val_;
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const error_category* __cat_;
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public:
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_LIBCPP_ALWAYS_INLINE
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error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {}
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_LIBCPP_ALWAYS_INLINE
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error_code(int __val, const error_category& __cat) _NOEXCEPT
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: __val_(__val), __cat_(&__cat) {}
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template <class _E>
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_LIBCPP_ALWAYS_INLINE
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error_code(_E __e,
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typename enable_if<is_error_code_enum<_E>::value>::type* = 0
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) _NOEXCEPT
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{*this = make_error_code(__e);}
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_LIBCPP_ALWAYS_INLINE
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void assign(int __val, const error_category& __cat) _NOEXCEPT
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{
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__val_ = __val;
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__cat_ = &__cat;
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}
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template <class _E>
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_LIBCPP_ALWAYS_INLINE
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typename enable_if
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<
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is_error_code_enum<_E>::value,
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error_code&
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>::type
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operator=(_E __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
|
|
//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_VISIBLE 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_VISIBLE 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);
|
|
};
|
|
|
|
void __throw_system_error(int ev, const char* what_arg);
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_SYSTEM_ERROR
|