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2b47727c | 1 | /* Internal pthread_atfork definitions. |
581c785b | 2 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
33574c17 ST |
3 | This file is part of the GNU C Library. |
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 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
33574c17 | 18 | |
2b47727c AZ |
19 | #ifndef _REGISTER_ATFORK_H |
20 | #define _REGISTER_ATFORK_H | |
21 | ||
22 | /* Elements of the fork handler lists. */ | |
23 | struct fork_handler | |
24 | { | |
25 | void (*prepare_handler) (void); | |
26 | void (*parent_handler) (void); | |
27 | void (*child_handler) (void); | |
28 | void *dso_handle; | |
29 | }; | |
30 | ||
33574c17 ST |
31 | /* Function to call to unregister fork handlers. */ |
32 | extern void __unregister_atfork (void *dso_handle) attribute_hidden; | |
33 | #define UNREGISTER_ATFORK(dso_handle) __unregister_atfork (dso_handle) | |
34 | ||
2b47727c AZ |
35 | enum __run_fork_handler_type |
36 | { | |
37 | atfork_run_prepare, | |
38 | atfork_run_child, | |
39 | atfork_run_parent | |
40 | }; | |
41 | ||
42 | /* Run the atfork handlers and lock/unlock the internal lock depending | |
43 | of the WHO argument: | |
44 | ||
45 | - atfork_run_prepare: run all the PREPARE_HANDLER in reverse order of | |
46 | insertion and locks the internal lock. | |
47 | - atfork_run_child: run all the CHILD_HANDLER and unlocks the internal | |
48 | lock. | |
49 | - atfork_run_parent: run all the PARENT_HANDLER and unlocks the internal | |
50 | lock. | |
51 | ||
52 | Perform locking only if DO_LOCKING. */ | |
53 | extern void __run_fork_handlers (enum __run_fork_handler_type who, | |
54 | _Bool do_locking) attribute_hidden; | |
33574c17 ST |
55 | |
56 | /* C library side function to register new fork handlers. */ | |
57 | extern int __register_atfork (void (*__prepare) (void), | |
58 | void (*__parent) (void), | |
59 | void (*__child) (void), | |
60 | void *dso_handle); | |
61 | libc_hidden_proto (__register_atfork) | |
2b47727c AZ |
62 | |
63 | #endif |