]>
Commit | Line | Data |
---|---|---|
688903eb | 1 | /* Copyright (C) 2002-2018 Free Software Foundation, Inc. |
6efd4814 UD |
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 | 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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
6efd4814 UD |
18 | |
19 | #include "pthreadP.h" | |
20 | ||
21 | ||
22 | void | |
80d9be81 JM |
23 | _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer, |
24 | void (*routine) (void *), void *arg) | |
6efd4814 UD |
25 | { |
26 | struct pthread *self = THREAD_SELF; | |
27 | ||
28 | buffer->__routine = routine; | |
29 | buffer->__arg = arg; | |
30 | buffer->__prev = THREAD_GETMEM (self, cleanup); | |
31 | ||
32 | int cancelhandling = THREAD_GETMEM (self, cancelhandling); | |
33 | ||
34 | /* Disable asynchronous cancellation for now. */ | |
a1ffb40e | 35 | if (__glibc_unlikely (cancelhandling & CANCELTYPE_BITMASK)) |
6efd4814 UD |
36 | while (1) |
37 | { | |
38 | int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, | |
39 | cancelhandling | |
40 | & ~CANCELTYPE_BITMASK, | |
41 | cancelhandling); | |
a1ffb40e | 42 | if (__glibc_likely (curval == cancelhandling)) |
6efd4814 UD |
43 | /* Successfully replaced the value. */ |
44 | break; | |
45 | ||
46 | /* Prepare for the next round. */ | |
47 | cancelhandling = curval; | |
48 | } | |
49 | ||
50 | buffer->__canceltype = (cancelhandling & CANCELTYPE_BITMASK | |
51 | ? PTHREAD_CANCEL_ASYNCHRONOUS | |
52 | : PTHREAD_CANCEL_DEFERRED); | |
53 | ||
54 | THREAD_SETMEM (self, cleanup, buffer); | |
55 | } | |
56 | strong_alias (_pthread_cleanup_push_defer, __pthread_cleanup_push_defer) | |
57 | ||
58 | ||
59 | void | |
f63f2bfd JM |
60 | _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer, |
61 | int execute) | |
6efd4814 UD |
62 | { |
63 | struct pthread *self = THREAD_SELF; | |
64 | ||
65 | THREAD_SETMEM (self, cleanup, buffer->__prev); | |
66 | ||
67 | int cancelhandling; | |
68 | if (__builtin_expect (buffer->__canceltype != PTHREAD_CANCEL_DEFERRED, 0) | |
69 | && ((cancelhandling = THREAD_GETMEM (self, cancelhandling)) | |
70 | & CANCELTYPE_BITMASK) == 0) | |
71 | { | |
72 | while (1) | |
73 | { | |
74 | int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, | |
75 | cancelhandling | |
76 | | CANCELTYPE_BITMASK, | |
77 | cancelhandling); | |
a1ffb40e | 78 | if (__glibc_likely (curval == cancelhandling)) |
6efd4814 UD |
79 | /* Successfully replaced the value. */ |
80 | break; | |
81 | ||
82 | /* Prepare for the next round. */ | |
83 | cancelhandling = curval; | |
84 | } | |
85 | ||
86 | CANCELLATION_P (self); | |
87 | } | |
88 | ||
89 | /* If necessary call the cleanup routine after we removed the | |
90 | current cleanup block from the list. */ | |
91 | if (execute) | |
92 | buffer->__routine (buffer->__arg); | |
93 | } | |
94 | strong_alias (_pthread_cleanup_pop_restore, __pthread_cleanup_pop_restore) |