1 /*
2 * Copyright (c) 2003 Daniel M. Eischen <deischen@freebsd.org>
3 * Copyright (c) 2003 Sergey Osokin <osa@freebsd.org.ru>.
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. Neither the name of the author nor the names of any co-contributors
12 * may be used to endorse or promote products derived from this software
13 * without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: src/lib/libpthread/thread/thr_concurrency.c,v 1.8 2004/03/14 05:24:27 bde Exp $
28 */
29
30 #include "namespace.h"
31 #include <errno.h>
32 #include <pthread.h>
33 #include "un-namespace.h"
34
35 #include "thr_private.h"
36
37 static int current_concurrency = 0;
38
39 int
_pthread_getconcurrency(void)40 _pthread_getconcurrency(void)
41 {
42 return current_concurrency;
43 }
44
45 int
_pthread_setconcurrency(int new_level)46 _pthread_setconcurrency(int new_level)
47 {
48 if (new_level < 0)
49 return (EINVAL);
50
51 current_concurrency = new_level;
52 return 0;
53 }
54
55 __strong_reference(_pthread_getconcurrency, pthread_getconcurrency);
56 __strong_reference(_pthread_setconcurrency, pthread_setconcurrency);
57