glibc/sysdeps/mach/hurd/errno-loc.c

/* __errno_location -- helper function for locating per-thread errno value
   Copyright (C) 2002-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <hurd/threadvar.h>

int *
__errno_location (void)
{
  return (int *) __hurd_threadvar_location (_HURD_THREADVAR_ERRNO);
}
strong_alias (__errno_location, __hurd_errno_location)
libc_hidden_def (__errno_location)