Cleanup the TLS implementation:
[dragonfly.git] / lib / libthread_xu / sys / thr_error.c
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1/*
2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
3 * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by John Birrell
17 * and Chris Provenzano.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: src/lib/libpthread/sys/thr_error.c,v 1.7 2003/04/23 21:46:50 deischen Exp $
9e2ee207 35 * $DragonFly: src/lib/libthread_xu/sys/Attic/thr_error.c,v 1.2 2005/03/29 19:26:20 joerg Exp $
71b3fa15 36 */
9e2ee207 37#include <machine/tls.h>
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38#include <pthread.h>
39#include "libc_private.h"
40#include "thr_private.h"
41
42#undef errno
43extern int errno;
44
45int *
46__error(void)
47{
9e2ee207 48 struct pthread *curthread = tls_get_curthread();
71b3fa15 49
9e2ee207 50 if (curthread != _thr_initial)
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51 return (&curthread->error);
52 else
53 return (&errno);
54}