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glibc  2.9
herrno.c
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00001 /* Copyright (C) 1996,97,98,2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <features.h>
00020 #include <netdb.h>
00021 #undef h_errno
00022 
00023 #include <tls.h>
00024 
00025 /* We need to have the error status variable of the resolver
00026    accessible in the libc.  */
00027 extern __thread int h_errno;
00028 
00029 
00030 /* When threaded, h_errno may be a per-thread variable.  */
00031 int *
00032 __h_errno_location (void)
00033 {
00034   return &h_errno;
00035 }