]>
Commit | Line | Data |
---|---|---|
688903eb | 1 | /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
c84142e8 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
17 | |
18 | #ifndef _EXIT_H | |
5107cf1d | 19 | #define _EXIT_H 1 |
28f540f4 | 20 | |
610e67ed | 21 | #include <stdbool.h> |
a92b1166 | 22 | #include <stdint.h> |
26e70aec | 23 | #include <libc-lock.h> |
c41041bc UD |
24 | |
25 | enum | |
26 | { | |
27 | ef_free, /* `ef_free' MUST be zero! */ | |
28 | ef_us, | |
29 | ef_on, | |
30 | ef_at, | |
5ef50d00 | 31 | ef_cxa |
c41041bc UD |
32 | }; |
33 | ||
28f540f4 RM |
34 | struct exit_function |
35 | { | |
c41041bc UD |
36 | /* `flavour' should be of type of the `enum' above but since we need |
37 | this element in an atomic operation we have to use `long int'. */ | |
38 | long int flavor; | |
28f540f4 RM |
39 | union |
40 | { | |
ba1ffaa1 | 41 | void (*at) (void); |
28f540f4 RM |
42 | struct |
43 | { | |
ba1ffaa1 UD |
44 | void (*fn) (int status, void *arg); |
45 | void *arg; | |
28f540f4 | 46 | } on; |
c41041bc UD |
47 | struct |
48 | { | |
5ef50d00 | 49 | void (*fn) (void *arg, int status); |
c41041bc UD |
50 | void *arg; |
51 | void *dso_handle; | |
52 | } cxa; | |
28f540f4 RM |
53 | } func; |
54 | }; | |
55 | struct exit_function_list | |
56 | { | |
57 | struct exit_function_list *next; | |
58 | size_t idx; | |
59 | struct exit_function fns[32]; | |
60 | }; | |
26e70aec | 61 | |
aa32f798 | 62 | extern struct exit_function_list *__exit_funcs attribute_hidden; |
610e67ed | 63 | extern struct exit_function_list *__quick_exit_funcs attribute_hidden; |
26e70aec PP |
64 | extern uint64_t __new_exitfn_called attribute_hidden; |
65 | ||
66 | /* True once all registered atexit/at_quick_exit/onexit handlers have been | |
67 | called */ | |
68 | extern bool __exit_funcs_done attribute_hidden; | |
69 | ||
70 | /* This lock protects __exit_funcs, __quick_exit_funcs, __exit_funcs_done | |
71 | and __new_exitfn_called globals against simultaneous access from | |
72 | atexit/on_exit/at_quick_exit in multiple threads, and also from | |
73 | simultaneous access while another thread is in the middle of calling | |
74 | exit handlers. See BZ#14333. Note: for lists, the entire list, and | |
75 | each associated entry in the list, is protected for all access by this | |
76 | lock. */ | |
77 | __libc_lock_define (extern, __exit_funcs_lock); | |
78 | ||
28f540f4 | 79 | |
bde06c87 L |
80 | extern struct exit_function *__new_exitfn (struct exit_function_list **listp) |
81 | attribute_hidden; | |
28f540f4 | 82 | |
47dd3543 CD |
83 | extern void __run_exit_handlers (int status, |
84 | struct exit_function_list **listp, | |
85 | bool run_list_atexit, bool run_dtors) | |
eec4b454 | 86 | attribute_hidden __attribute__ ((__noreturn__)); |
610e67ed UD |
87 | |
88 | extern int __internal_atexit (void (*func) (void *), void *arg, void *d, | |
89 | struct exit_function_list **listp) | |
90 | attribute_hidden; | |
eec4b454 | 91 | extern int __cxa_at_quick_exit (void (*func) (void *), void *d); |
610e67ed UD |
92 | |
93 | ||
28f540f4 | 94 | #endif /* exit.h */ |