1 /* $OpenBSD: uthread_seterrno.c,v 1.4 1999/11/27 01:30:11 d Exp $ */
2 /*
3 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
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 * 4. Neither the name of the author nor the names of any co-contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: uthread_seterrno.c,v 1.4 1999/08/28 00:03:46 peter Exp $
34 */
35 #ifdef _THREAD_SAFE
36 #include <pthread.h>
37 #include "pthread_private.h"
38
39 /*
40 * This function needs to reference the global error variable which is
41 * normally hidden from the user.
42 */
43 #ifdef errno
44 #undef errno
45 #endif
46 extern int errno;
47
48 void
_thread_seterrno(pthread_t thread,int error)49 _thread_seterrno(pthread_t thread, int error)
50 {
51
52 /* Don't allow _thread_run to change: */
53 _thread_kern_sig_defer();
54
55 /* Check for the current thread: */
56 if (thread == _thread_run)
57 /* The current thread always uses the global error variable: */
58 errno = error;
59 else
60 /*
61 * Threads other than the current thread will keep the error
62 * field in the thread structure:
63 */
64 thread->error = error;
65
66 _thread_kern_sig_undefer();
67 }
68 #endif
69