. /include/boost/corosio /native /detail /make_err.hpp
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1   // 1   //
2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) 2   // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com)
3   // Copyright (c) 2026 Steve Gerbino 3   // Copyright (c) 2026 Steve Gerbino
4   // Copyright (c) 2026 Michael Vandeberg 4   // Copyright (c) 2026 Michael Vandeberg
5   // 5   //
6   // Distributed under the Boost Software License, Version 1.0. (See accompanying 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) 7   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8   // 8   //
9   // Official repository: https://github.com/cppalliance/corosio 9   // Official repository: https://github.com/cppalliance/corosio
10   // 10   //
11   11  
12   #ifndef BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP 12   #ifndef BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP
13   #define BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP 13   #define BOOST_COROSIO_NATIVE_DETAIL_MAKE_ERR_HPP
14   14  
15   #include <boost/corosio/detail/config.hpp> 15   #include <boost/corosio/detail/config.hpp>
16   #include <boost/corosio/detail/platform.hpp> 16   #include <boost/corosio/detail/platform.hpp>
17   #include <boost/capy/error.hpp> 17   #include <boost/capy/error.hpp>
18   #include <system_error> 18   #include <system_error>
19   19  
20   #if BOOST_COROSIO_POSIX 20   #if BOOST_COROSIO_POSIX
21   #include <errno.h> 21   #include <errno.h>
22   #else 22   #else
23   #ifndef WIN32_LEAN_AND_MEAN 23   #ifndef WIN32_LEAN_AND_MEAN
24   #define WIN32_LEAN_AND_MEAN 24   #define WIN32_LEAN_AND_MEAN
25   #endif 25   #endif
26   #include <Windows.h> 26   #include <Windows.h>
27   #endif 27   #endif
28   28  
29   namespace boost::corosio::detail { 29   namespace boost::corosio::detail {
30   30  
31   #if BOOST_COROSIO_POSIX 31   #if BOOST_COROSIO_POSIX
32   32  
33   /** Convert a POSIX errno value to std::error_code. 33   /** Convert a POSIX errno value to std::error_code.
34   34  
35   Maps ECANCELED to capy::error::canceled. 35   Maps ECANCELED to capy::error::canceled.
36   36  
37   @param errn The errno value. 37   @param errn The errno value.
38   @return The corresponding std::error_code. 38   @return The corresponding std::error_code.
39   */ 39   */
40   inline std::error_code 40   inline std::error_code
HITCBC 41   87 make_err(int errn) noexcept 41   87 make_err(int errn) noexcept
42   { 42   {
HITCBC 43   87 if (errn == 0) 43   87 if (errn == 0)
MISUBC 44   ✗ return {}; 44   ✗ return {};
45   45  
HITCBC 46   87 if (errn == ECANCELED) 46   87 if (errn == ECANCELED)
MISUBC 47   ✗ return capy::error::canceled; 47   ✗ return capy::error::canceled;
48   48  
HITCBC 49   87 return std::error_code(errn, std::system_category()); 49   87 return std::error_code(errn, std::system_category());
50   } 50   }
51   51  
52   #else 52   #else
53   53  
54   /** Convert a Windows error code to std::error_code. 54   /** Convert a Windows error code to std::error_code.
55   55  
56   Maps ERROR_OPERATION_ABORTED and ERROR_CANCELLED to 56   Maps ERROR_OPERATION_ABORTED and ERROR_CANCELLED to
57   capy::error::canceled, and ERROR_HANDLE_EOF to capy::error::eof. 57   capy::error::canceled, and ERROR_HANDLE_EOF to capy::error::eof.
58   Every other code passes through std::system_category(). 58   Every other code passes through std::system_category().
59   59  
60   ERROR_NETNAME_DELETED (64) is deliberately not mapped here: IOCP 60   ERROR_NETNAME_DELETED (64) is deliberately not mapped here: IOCP
61   delivers it both for a local closesocket() that cancels pending I/O 61   delivers it both for a local closesocket() that cancels pending I/O
62   and for a remote RST, so it can only be disambiguated per operation 62   and for a remote RST, so it can only be disambiguated per operation
63   kind at the IOCP decode sites (see iocp_make_err in win_overlapped_op). 63   kind at the IOCP decode sites (see iocp_make_err in win_overlapped_op).
64   64  
65   @param dwError The Windows error code (DWORD). 65   @param dwError The Windows error code (DWORD).
66   @return The corresponding std::error_code. 66   @return The corresponding std::error_code.
67   */ 67   */
68   inline std::error_code 68   inline std::error_code
69   make_err(unsigned long dwError) noexcept 69   make_err(unsigned long dwError) noexcept
70   { 70   {
71   if (dwError == 0) 71   if (dwError == 0)
72   return {}; 72   return {};
73   73  
74   if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED) 74   if (dwError == ERROR_OPERATION_ABORTED || dwError == ERROR_CANCELLED)
75   return capy::error::canceled; 75   return capy::error::canceled;
76   76  
77   if (dwError == ERROR_HANDLE_EOF) 77   if (dwError == ERROR_HANDLE_EOF)
78   return capy::error::eof; 78   return capy::error::eof;
79   79  
80   return std::error_code(static_cast<int>(dwError), std::system_category()); 80   return std::error_code(static_cast<int>(dwError), std::system_category());
81   } 81   }
82   82  
83   #endif 83   #endif
84   84  
85   } // namespace boost::corosio::detail 85   } // namespace boost::corosio::detail
86   86  
87   #endif 87   #endif