1 | /* Copyright (C) 2002-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | In addition to the permissions in the GNU Lesser General Public |
11 | License, the Free Software Foundation gives you unlimited |
12 | permission to link the compiled version of this file with other |
13 | programs, and to distribute those programs without any restriction |
14 | coming from the use of this file. (The GNU Lesser General Public |
15 | License restrictions do apply in other respects; for example, they |
16 | cover modification of the file, and distribution when not linked |
17 | into another program.) |
18 | |
19 | Note that people who make modified versions of this file are not |
20 | obligated to grant this special exception for their modified |
21 | versions; it is their choice whether to do so. The GNU Lesser |
22 | General Public License gives permission to release a modified |
23 | version without this exception; this exception also makes it |
24 | possible to release a modified version which carries forward this |
25 | exception. |
26 | |
27 | The GNU C Library is distributed in the hope that it will be useful, |
28 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
30 | Lesser General Public License for more details. |
31 | |
32 | You should have received a copy of the GNU Lesser General Public |
33 | License along with the GNU C Library; if not, see |
34 | <http://www.gnu.org/licenses/>. */ |
35 | |
36 | #include "pthreadP.h" |
37 | #include <fork.h> |
38 | |
39 | /* This is defined by newer gcc version unique for each module. */ |
40 | extern void *__dso_handle __attribute__ ((__weak__, |
41 | __visibility__ ("hidden" ))); |
42 | |
43 | |
44 | /* Hide the symbol so that no definition but the one locally in the |
45 | executable or DSO is used. */ |
46 | int |
47 | #ifndef __pthread_atfork |
48 | /* Don't mark the compatibility function as hidden. */ |
49 | attribute_hidden |
50 | #endif |
51 | __pthread_atfork (void (*prepare) (void), void (*parent) (void), |
52 | void (*child) (void)) |
53 | { |
54 | return __register_atfork (prepare, parent, child, |
55 | &__dso_handle == NULL ? NULL : __dso_handle); |
56 | } |
57 | #ifndef __pthread_atfork |
58 | extern int pthread_atfork (void (*prepare) (void), void (*parent) (void), |
59 | void (*child) (void)) attribute_hidden; |
60 | strong_alias (__pthread_atfork, pthread_atfork) |
61 | #endif |
62 | |