1 /* $OpenBSD: uthread_switch_np.c,v 1.2 1999/11/25 07:01:46 d Exp $ */
2 /*
3 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
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 Daniel Eischen.
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 DANIEL EISCHEN 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_switch_np.c,v 1.3 1999/08/28 00:03:53 peter Exp $
34 */
35 #include <errno.h>
36 #ifdef _THREAD_SAFE
37 #include <pthread.h>
38 #include <pthread_np.h>
39 #include "pthread_private.h"
40
41
42 int
pthread_switch_add_np(pthread_switch_routine_t routine)43 pthread_switch_add_np(pthread_switch_routine_t routine)
44 {
45 int ret = 0;
46
47 if (routine == NULL)
48 /* Return an invalid argument error: */
49 ret = EINVAL;
50 else
51 /* Shouldn't need a lock to protect this assigment. */
52 _sched_switch_hook = routine;
53
54 return(ret);
55 }
56
57 int
pthread_switch_delete_np(pthread_switch_routine_t routine)58 pthread_switch_delete_np(pthread_switch_routine_t routine)
59 {
60 int ret = 0;
61
62 if (routine != _sched_switch_hook)
63 /* Return an invalid argument error: */
64 ret = EINVAL;
65 else
66 /* Shouldn't need a lock to protect this assigment. */
67 _sched_switch_hook = NULL;
68
69 return(ret);
70 }
71 #endif
72