lib/libc_r/uthread/uthread_atfork.c

   1 /*
   2  * Copyright (c) 2003 Daniel Eischen <deischen at freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Neither the name of the author nor the names of any co-contributors
  11  *    may be used to endorse or promote products derived from this software
  12  *    without specific prior written permission.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libpthread/thread/thr_atfork.c,v 1.1 2003/11/05 03:42:10 davidxu Exp $
  27  * $DragonFly: src/lib/libc_r/uthread/uthread_atfork.c,v 1.1 2008/05/25 21:34:49 hasso Exp $
  28  */
  29 #include <errno.h>
  30 #include <stdlib.h>
  31 #include <pthread.h>
  32 #include <sys/queue.h>
  33 #include "pthread_private.h"
  34
  35 int
  36 _pthread_atfork(void (*prepare)(void), void (*parent)(void),
  37     void (*child)(void))
  38 {
  39         struct pthread_atfork *af;
  40
  41         if (_thread_initial == NULL)
  42                 _thread_init();
  43
  44         if ((af = malloc(sizeof(struct pthread_atfork))) == NULL)
  45                 return (ENOMEM);
  46
  47         af->prepare = prepare;
  48         af->parent = parent;
  49         af->child = child;
  50         _pthread_mutex_lock(&_atfork_mutex);
  51         TAILQ_INSERT_TAIL(&_atfork_list, af, qe);
  52         _pthread_mutex_unlock(&_atfork_mutex);
  53         return (0);
  54 }
  55
  56 __strong_reference(_pthread_atfork, pthread_atfork);