1/*	$OpenBSD: thread_atexit.c,v 1.2 2019/06/02 01:03:01 guenther Exp $ */
2/*
3 * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <dlfcn.h>
19#include <stdlib.h>
20#include <tib.h>
21
22#include "atexit.h"
23
24__weak_alias(__cxa_thread_atexit, __cxa_thread_atexit_impl);
25
26int
27__cxa_thread_atexit_impl(void (*func)(void *), void *arg, void *dso)
28{
29	struct thread_atexit_fn *fnp;
30	struct tib *tib = TIB_GET();
31
32	fnp = calloc(1, sizeof(struct thread_atexit_fn));
33	if (fnp == NULL)
34		return -1;
35
36	dlctl(NULL, DL_REFERENCE, dso);
37
38	fnp->func = func;
39	fnp->arg = arg;
40	fnp->next = tib->tib_atexit;
41	tib->tib_atexit = fnp;
42
43	return 0;
44}
45