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 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