gl/msvc-nothrow.h

   1 /* Wrappers that don't throw invalid parameter notifications
   2    with MSVC runtime libraries.
   3    Copyright (C) 2011-2023 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _MSVC_NOTHROW_H
  19 #define _MSVC_NOTHROW_H
  20
  21 /* With MSVC runtime libraries with the "invalid parameter handler" concept,
  22    functions like fprintf(), dup2(), or close() crash when the caller passes
  23    an invalid argument.  But POSIX wants error codes (such as EINVAL or EBADF)
  24    instead.
  25    This file defines wrappers that turn such an invalid parameter notification
  26    into an error code.  */
  27
  28 #if defined _WIN32 && ! defined __CYGWIN__
  29
  30 /* Get original declaration of _get_osfhandle.  */
  31 # include <io.h>
  32
  33 # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  34
  35 /* Override _get_osfhandle.  */
  36 extern intptr_t _gl_nothrow_get_osfhandle (int fd);
  37 #  define _get_osfhandle _gl_nothrow_get_osfhandle
  38
  39 # endif
  40
  41 #endif
  42
  43 #endif /* _MSVC_NOTHROW_H */