include/boost/corosio/native/detail/make_err.hpp
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boost::corosio::detail::make_err(unsigned long)
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|---|---|---|---|---|
| 1 | // | |||
| 2 | // Copyright (c) 2025 Vinnie Falco ([email protected]) | |||
| 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 | make_err(int errn) noexcept | |||
| 42 | { | |||
| 43 | if (errn == 0) | |||
| 44 | return {}; | |||
| 45 | ||||
| 46 | 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 | if (errn == ENOTSUP) | |||
| 52 | return std::make_error_code(std::errc::operation_not_supported); | |||
| 53 | ||||
| 54 | 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 | 2630x | make_err(unsigned long dwError) noexcept | ||
| 77 | { | |||
| 78 |
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2630x | if (dwError == 0) | |
| 79 | 1x | return {}; | ||
| 80 | ||||
| 81 |
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2629x | if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED) | |
| 82 | 2099x | return capy::error::canceled; | ||
| 83 | ||||
| 84 |
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530x | 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 |
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530x | if (dwError == WSAEOPNOTSUPP) | |
| 91 | 12x | return std::make_error_code(std::errc::operation_not_supported); | ||
| 92 |
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518x | if (dwError == WSAENOTSOCK) | |
| 93 | 90x | return std::make_error_code(std::errc::not_a_socket); | ||
| 94 |
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428x | if (dwError == WSAEAFNOSUPPORT) | |
| 95 | 32x | return std::make_error_code(std::errc::address_family_not_supported); | ||
| 96 |
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396x | if (dwError == WSAEPROTOTYPE) | |
| 97 | 4x | return std::make_error_code(std::errc::wrong_protocol_type); | ||
| 98 |
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392x | if (dwError == WSAEADDRINUSE) | |
| 99 | 11x | return std::make_error_code(std::errc::address_in_use); | ||
| 100 |
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381x | if (dwError == WSAEADDRNOTAVAIL) | |
| 101 | 7x | return std::make_error_code(std::errc::address_not_available); | ||
| 102 |
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374x | if (dwError == ERROR_NEGATIVE_SEEK) | |
| 103 | 3x | return std::make_error_code(std::errc::invalid_argument); | ||
| 104 | // A thread the system will not give is the same retryable | |||
| 105 | // condition POSIX spells EAGAIN, which is what the contract | |||
| 106 | // promises; no toolchain maps the Win32 spelling to it. | |||
| 107 |
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371x | if (dwError == ERROR_MAX_THRDS_REACHED) | |
| 108 | ✗ | return std::make_error_code(std::errc::resource_unavailable_try_again); | ||
| 109 | ||||
| 110 | 371x | return std::error_code(static_cast<int>(dwError), std::system_category()); | ||
| 111 | } | |||
| 112 | ||||
| 113 | #endif | |||
| 114 | ||||
| 115 | } // namespace boost::corosio::detail | |||
| 116 | ||||
| 117 | #endif | |||
| 118 |