TLA  Line data    Source code

       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 HIT           9 : make_err(int errn) noexcept
      41                 : {
      42               9 :     if (errn == 0)
      43 MIS           0 :         return {};
      44                 : 
      45 HIT           9 :     if (errn == ECANCELED)
      46 MIS           0 :         return capy::error::canceled;
      47                 : 
      48 HIT           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