include/boost/corosio/native/detail/make_err.hpp
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boost::corosio::detail::make_err(int)
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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // Copyright (c) 2026 Steve Gerbino | ||
| 4 | // Copyright (c) 2026 Michael Vandeberg | ||
| 5 | // | ||
| 6 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 7 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 8 | // | ||
| 9 | // Official repository: https://github.com/cppalliance/corosio | ||
| 10 | // | ||
| 11 | |||
| 12 | #ifndef BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP | ||
| 13 | #define BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP | ||
| 14 | |||
| 15 | #include <boost/corosio/detail/config.hpp> | ||
| 16 | #include <boost/corosio/detail/platform.hpp> | ||
| 17 | #include <boost/capy/error.hpp> | ||
| 18 | #include <system_error> | ||
| 19 | |||
| 20 | #if BOOST_COROSIO_POSIX | ||
| 21 | #include <errno.h> | ||
| 22 | #else | ||
| 23 | #ifndef WIN32_LEAN_AND_MEAN | ||
| 24 | #define WIN32_LEAN_AND_MEAN | ||
| 25 | #endif | ||
| 26 | #include <Windows.h> | ||
| 27 | #endif | ||
| 28 | |||
| 29 | namespace boost::corosio::detail { | ||
| 30 | |||
| 31 | #if BOOST_COROSIO_POSIX | ||
| 32 | |||
| 33 | /** Convert a POSIX errno value to std::error_code. | ||
| 34 | |||
| 35 | Maps ECANCELED to capy::error::canceled. | ||
| 36 | |||
| 37 | @param errn The errno value. | ||
| 38 | @return The corresponding std::error_code. | ||
| 39 | */ | ||
| 40 | inline std::error_code | ||
| 41 | 518x | make_err(int errn) noexcept | |
| 42 | { | ||
| 43 | 518x | if (errn == 0) | |
| 44 | ✗ | return {}; | |
| 45 | |||
| 46 | 518x | if (errn == ECANCELED) | |
| 47 | ✗ | return capy::error::canceled; | |
| 48 | |||
| 49 | // Part of the portable wait contract; system_category's condition | ||
| 50 | // mapping varies by C++ runtime. | ||
| 51 | 518x | if (errn == ENOTSUP) | |
| 52 | 24x | return std::make_error_code(std::errc::operation_not_supported); | |
| 53 | |||
| 54 | 494x | return std::error_code(errn, std::system_category()); | |
| 55 | } | ||
| 56 | |||
| 57 | #else | ||
| 58 | |||
| 59 | /** Convert a Windows error code to std::error_code. | ||
| 60 | |||
| 61 | Maps ERROR_OPERATION_ABORTED and ERROR_CANCELLED to | ||
| 62 | capy::error::canceled, ERROR_HANDLE_EOF to capy::error::eof, and | ||
| 63 | the contracted WSA/Win32 codes to the `std::errc` conditions the | ||
| 64 | library promises. Every other code passes through | ||
| 65 | std::system_category(). | ||
| 66 | |||
| 67 | ERROR_NETNAME_DELETED (64) is deliberately not mapped here: IOCP | ||
| 68 | delivers it both for a local closesocket() that cancels pending I/O | ||
| 69 | and for a remote RST, so it can only be disambiguated per operation | ||
| 70 | kind at the IOCP decode sites (see iocp_make_err in win_overlapped_op). | ||
| 71 | |||
| 72 | @param dwError The Windows error code (DWORD). | ||
| 73 | @return The corresponding std::error_code. | ||
| 74 | */ | ||
| 75 | inline std::error_code | ||
| 76 | make_err(unsigned long dwError) noexcept | ||
| 77 | { | ||
| 78 | if (dwError == 0) | ||
| 79 | return {}; | ||
| 80 | |||
| 81 | if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED) | ||
| 82 | return capy::error::canceled; | ||
| 83 | |||
| 84 | if (dwError == ERROR_HANDLE_EOF) | ||
| 85 | return capy::error::eof; | ||
| 86 | |||
| 87 | // Part of the portable wait, adoption, bind, and seek contracts; | ||
| 88 | // system_category's condition mapping for WSA codes varies by | ||
| 89 | // toolchain. | ||
| 90 | if (dwError == WSAEOPNOTSUPP) | ||
| 91 | return std::make_error_code(std::errc::operation_not_supported); | ||
| 92 | if (dwError == WSAENOTSOCK) | ||
| 93 | return std::make_error_code(std::errc::not_a_socket); | ||
| 94 | if (dwError == WSAEAFNOSUPPORT) | ||
| 95 | return std::make_error_code( | ||
| 96 | std::errc::address_family_not_supported); | ||
| 97 | if (dwError == WSAEPROTOTYPE) | ||
| 98 | return std::make_error_code(std::errc::wrong_protocol_type); | ||
| 99 | if (dwError == WSAEADDRINUSE) | ||
| 100 | return std::make_error_code(std::errc::address_in_use); | ||
| 101 | if (dwError == WSAEADDRNOTAVAIL) | ||
| 102 | return std::make_error_code(std::errc::address_not_available); | ||
| 103 | if (dwError == ERROR_NEGATIVE_SEEK) | ||
| 104 | return std::make_error_code(std::errc::invalid_argument); | ||
| 105 | // A thread the system will not give is the same retryable | ||
| 106 | // condition POSIX spells EAGAIN, which is what the contract | ||
| 107 | // promises; no toolchain maps the Win32 spelling to it. | ||
| 108 | if (dwError == ERROR_MAX_THRDS_REACHED) | ||
| 109 | return std::make_error_code( | ||
| 110 | std::errc::resource_unavailable_try_again); | ||
| 111 | |||
| 112 | return std::error_code(static_cast<int>(dwError), std::system_category()); | ||
| 113 | } | ||
| 114 | |||
| 115 | #endif | ||
| 116 | |||
| 117 | } // namespace boost::corosio::detail | ||
| 118 | |||
| 119 | #endif | ||
| 120 |