include/boost/corosio/detail/make_err.hpp
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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // Copyright (c) 2026 Steve Gerbino | ||
| 4 | // | ||
| 5 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 6 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 7 | // | ||
| 8 | // Official repository: https://github.com/cppalliance/corosio | ||
| 9 | // | ||
| 10 | |||
| 11 | #ifndef BOOST_COROSIO_DETAIL_MAKE_ERR_HPP | ||
| 12 | #define BOOST_COROSIO_DETAIL_MAKE_ERR_HPP | ||
| 13 | |||
| 14 | #include <boost/corosio/detail/config.hpp> | ||
| 15 | #include <boost/corosio/detail/platform.hpp> | ||
| 16 | #include <boost/capy/error.hpp> | ||
| 17 | #include <system_error> | ||
| 18 | |||
| 19 | #if BOOST_COROSIO_POSIX | ||
| 20 | #include <errno.h> | ||
| 21 | #else | ||
| 22 | #ifndef WIN32_LEAN_AND_MEAN | ||
| 23 | #define WIN32_LEAN_AND_MEAN | ||
| 24 | #endif | ||
| 25 | #include <Windows.h> | ||
| 26 | #endif | ||
| 27 | |||
| 28 | namespace boost::corosio::detail { | ||
| 29 | |||
| 30 | #if BOOST_COROSIO_POSIX | ||
| 31 | |||
| 32 | /** Convert a POSIX errno value to std::error_code. | ||
| 33 | |||
| 34 | Maps ECANCELED to capy::error::canceled. | ||
| 35 | |||
| 36 | @param errn The errno value. | ||
| 37 | @return The corresponding std::error_code. | ||
| 38 | */ | ||
| 39 | inline std::error_code | ||
| 40 | 9 | make_err(int errn) noexcept | |
| 41 | { | ||
| 42 | 9 | if (errn == 0) | |
| 43 | ✗ | return {}; | |
| 44 | |||
| 45 | 9 | if (errn == ECANCELED) | |
| 46 | ✗ | return capy::error::canceled; | |
| 47 | |||
| 48 | 9 | return std::error_code(errn, std::system_category()); | |
| 49 | } | ||
| 50 | |||
| 51 | #else | ||
| 52 | |||
| 53 | /** Convert a Windows error code to std::error_code. | ||
| 54 | |||
| 55 | Maps ERROR_OPERATION_ABORTED, ERROR_CANCELLED, and | ||
| 56 | ERROR_NETNAME_DELETED to capy::error::canceled. | ||
| 57 | Maps ERROR_HANDLE_EOF to capy::error::eof. | ||
| 58 | |||
| 59 | ERROR_NETNAME_DELETED (64) is what IOCP actually delivers | ||
| 60 | when closesocket() cancels pending overlapped I/O, despite | ||
| 61 | MSDN documenting ERROR_OPERATION_ABORTED for that case. | ||
| 62 | |||
| 63 | @param dwError The Windows error code (DWORD). | ||
| 64 | @return The corresponding std::error_code. | ||
| 65 | */ | ||
| 66 | inline std::error_code | ||
| 67 | make_err(unsigned long dwError) noexcept | ||
| 68 | { | ||
| 69 | if (dwError == 0) | ||
| 70 | return {}; | ||
| 71 | |||
| 72 | if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED || | ||
| 73 | dwError == ERROR_NETNAME_DELETED) | ||
| 74 | return capy::error::canceled; | ||
| 75 | |||
| 76 | if (dwError == ERROR_HANDLE_EOF) | ||
| 77 | return capy::error::eof; | ||
| 78 | |||
| 79 | return std::error_code(static_cast<int>(dwError), std::system_category()); | ||
| 80 | } | ||
| 81 | |||
| 82 | #endif | ||
| 83 | |||
| 84 | } // namespace boost::corosio::detail | ||
| 85 | |||
| 86 | #endif | ||
| 87 |