1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2002 Alfred Perlstein <alfred@freebsd.org>.
5 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by John Birrell.
19 * 4. Neither the name of the author nor the names of any co-contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <pthread.h>
37
38 #include "thr_private.h"
39
40 /*
41 * This module uses GCC extensions to initialize the
42 * threads package at program start-up time.
43 */
44
45 void _thread_init_hack(void) __attribute__ ((constructor));
46
47 void
_thread_init_hack(void)48 _thread_init_hack(void)
49 {
50
51 _thread_init();
52 }
53
54 /*
55 * For the shared version of the threads library, the above is sufficient.
56 * But for the archive version of the library, we need a little bit more.
57 * Namely, we must arrange for this particular module to be pulled in from
58 * the archive library at link time. To accomplish that, we define and
59 * initialize a variable, "_thread_autoinit_dummy_decl". This variable is
60 * referenced (as an extern) from libc/stdlib/exit.c. This will always
61 * create a need for this module, ensuring that it is present in the
62 * executable.
63 */
64 extern int _thread_autoinit_dummy_decl;
65 int _thread_autoinit_dummy_decl = 0;
66