Update.

2003-07-22  Jakub Jelinek  <jakub@redhat.com>

	* include/resolv.h (__resp): Declare.  Define to __libc_resp
	if in libc.so.
	(_res): If USE___THREAD, define to (*__resp).
	* resolv/res_libc.c (_res): Normal .bss variable with compat_symbol
	even if USE___THREAD.
	(__resp): New __thread variable.
	(__libc_resp): New alias.
	* resolv/Versions (libc): Export _res@GLIBC_2.0 even if
	USE_TLS && HAVE___THREAD.  Export __resp@@GLIBC_PRIVATE.
	* sysdeps/generic/res-state.c (__res_state): Return __resp
	if USE___THREAD.

1 files changed, 69 insertions, 0 deletions

diff --git a/nptl/tst-_res1.c b/nptl/tst-_res1.c
new file mode 100644
index 0000000000..651e3cc40d
--- /dev/null
+++ b/nptl/tst-_res1.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* Test whether _res in glibc 2.1.x and earlier (before __res_state()
+   was introduced) works.  Portable programs should never do the
+   dirty things below.  */
+
+#include <pthread.h>
+#include <resolv.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+void *tf (void *resp)
+{
+  if (resp == &_res || resp == __res_state ())
+    abort ();
+  _res.retry = 24;
+  return NULL;
+}
+
+void do_test (struct __res_state *resp)
+{
+  if (resp != &_res || resp != __res_state ())
+    abort ();
+  if (_res.retry != 12)
+    abort ();
+}
+
+int main (void)
+{
+#undef _res
+  extern struct __res_state _res;
+  pthread_t th;
+
+  _res.retry = 12;
+  if (pthread_create (&th, NULL, tf, &_res) != 0)
+    {
+      puts ("create failed");
+      exit (1);
+    }
+
+  do_test (&_res);
+
+  if (pthread_join (th, NULL) != 0)
+    {
+      puts ("join failed");
+      exit (1);
+    }
+
+  do_test (&_res);
+
+  exit (0);
+}