2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 David Chisnall
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/types.h>
32 #include <machine/atomic.h>
37 * Linked list of quick exit handlers. This is simpler than the atexit()
38 * version, because it is not required to support C++ destructors or
39 * DSO-specific cleanups.
41 struct quick_exit_handler {
42 struct quick_exit_handler *next;
43 void (*cleanup)(void);
47 * Lock protecting the handlers list.
49 static pthread_mutex_t atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
51 * Stack of cleanup handlers. These will be invoked in reverse order when
53 static struct quick_exit_handler *handlers;
56 at_quick_exit(void (*func)(void))
58 struct quick_exit_handler *h;
60 h = malloc(sizeof(*h));
65 pthread_mutex_lock(&atexit_mutex);
69 pthread_mutex_unlock(&atexit_mutex);
74 quick_exit(int status)
76 struct quick_exit_handler *h;
79 * XXX: The C++ spec requires us to call std::terminate if there is an
82 for (h = handlers; NULL != h; h = h->next) {