inet/herrno.c

   1 /* Copyright (C) 1996,97,98,2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <features.h>
  20 #include <netdb.h>
  21 #undef h_errno
  22
  23 #include <tls.h>
  24
  25 /* We need to have the error status variable of the resolver
  26    accessible in the libc.  */
  27
  28 #if USE_TLS && HAVE___THREAD
  29 __thread int h_errno;
  30 #else
  31 int h_errno = 0;
  32 weak_alias (h_errno, _h_errno)
  33 #endif
  34
  35 /* When threaded, h_errno may be a per-thread variable.  */
  36 int *
  37 weak_const_function
  38 __h_errno_location (void)
  39 {
  40   return &h_errno;
  41 }