thr_autoinit.c revision 96401
1/*
2 * Copyright (c) 2002 Alfred Perlstein <alfred@freebsd.org>.
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: head/lib/libkse/thread/thr_autoinit.c 96401 2002-05-11 08:13:42Z alfred $
34 */
35
36/*
37 * This module uses GCC extentions to initialize the
38 * threads package at program start-up time.
39 */
40
41void	_thread_init_hack(void) __attribute__ ((constructor));
42
43void
44_thread_init_hack(void)
45{
46
47	_thread_init();
48}
49
50/*
51 * For the shared version of the threads library, the above is sufficient.
52 * But for the archive version of the library, we need a little bit more.
53 * Namely, we must arrange for this particular module to be pulled in from
54 * the archive library at link time.  To accomplish that, we define and
55 * initialize a variable, "_thread_autoinit_dummy_decl".  This variable is
56 * referenced (as an extern) from libc/stdlib/exit.c. This will always
57 * create a need for this module, ensuring that it is present in the
58 * executable.
59 */
60extern int _thread_autoinit_dummy_decl;
61int _thread_autoinit_dummy_decl = 0;
62