74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/* $OpenBSD: atfork.c,v 1.4 2022/12/27 17:10:06 jmc Exp $ */
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/*
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* Copyright (c) 2008 Kurt Miller <kurt@openbsd.org>
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* Copyright (c) 2008 Philip Guenther <guenther@openbsd.org>
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* Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: /repoman/r/ncvs/src/lib/libc_r/uthread/uthread_atfork.c,v 1.1 2004/12/10 03:36:45 grog Exp $
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*/
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#include <errno.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include "thread_private.h"
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#include "atfork.h"
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int _thread_atfork(void (*_prepare)(void), void (*_parent)(void),
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void (*_child)(void), void *_dso);
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PROTO_NORMAL(_thread_atfork);
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int
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_thread_atfork(void (*prepare)(void), void (*parent)(void),
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void (*child)(void), void *dso)
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{
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struct atfork_fn *af;
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if ((af = malloc(sizeof *af)) == NULL)
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return (ENOMEM);
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af->fn_prepare = prepare;
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af->fn_parent = parent;
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af->fn_child = child;
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af->fn_dso = dso;
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_ATFORK_LOCK();
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TAILQ_INSERT_TAIL(&_atfork_list, af, fn_next);
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_ATFORK_UNLOCK();
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return (0);
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}
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DEF_STRONG(_thread_atfork);
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/*
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* Copy of pthread_atfork() used by libc and anything statically linked
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* into the executable. This passes NULL for the dso, so the callbacks
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* are never removed by dlclose()
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*/
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int
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pthread_atfork(void (*prep)(void), void (*parent)(void), void (*child)(void))
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{
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return (_thread_atfork(prep, parent, child, NULL));
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}
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