linuxthreads/errno.c

   1 /* Linuxthreads - a simple clone()-based implementation of Posix        */
   2 /* threads for Linux.                                                   */
   3 /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */
   4 /*                                                                      */
   5 /* This program is free software; you can redistribute it and/or        */
   6 /* modify it under the terms of the GNU Library General Public License  */
   7 /* as published by the Free Software Foundation; either version 2       */
   8 /* of the License, or (at your option) any later version.               */
   9 /*                                                                      */
  10 /* This program 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 Library General Public License for more details.                 */
  14
  15 /* Define the location of errno for the remainder of the C library */
  16
  17 #include <errno.h>
  18 #include <netdb.h>
  19 #include <resolv.h>
  20 #include <tls.h>
  21 #include "pthread.h"
  22 #include "internals.h"
  23
  24 #if !USE_TLS || !HAVE___THREAD
  25 /* The definition in libc is sufficient if we use TLS.  */
  26 int *
  27 __errno_location (void)
  28 {
  29   pthread_descr self = thread_self();
  30   return THREAD_GETMEM (self, p_errnop);
  31 }
  32
  33 int *
  34 __h_errno_location (void)
  35 {
  36   pthread_descr self = thread_self();
  37   return THREAD_GETMEM (self, p_h_errnop);
  38 }
  39
  40 /* Return thread specific resolver state.  */
  41 struct __res_state *
  42 __res_state (void)
  43 {
  44   pthread_descr self = thread_self();
  45   return THREAD_GETMEM (self, p_resp);
  46 }
  47 #endif