]>
Commit | Line | Data |
---|---|---|
dff8da6b | 1 | /* Copyright (C) 2002-2024 Free Software Foundation, Inc. |
76a50749 | 2 | This file is part of the GNU C Library. |
76a50749 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
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. | |
8 | ||
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 | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
17 | |
18 | #include <errno.h> | |
19 | #include "pthreadP.h" | |
20 | #include <atomic.h> | |
93d78ec1 | 21 | #include <libc-lockP.h> |
76a50749 UD |
22 | |
23 | int | |
9d46370c | 24 | __pthread_setcancelstate (int state, int *oldstate) |
76a50749 UD |
25 | { |
26 | volatile struct pthread *self; | |
27 | ||
28 | if (state < PTHREAD_CANCEL_ENABLE || state > PTHREAD_CANCEL_DISABLE) | |
29 | return EINVAL; | |
30 | ||
31 | self = THREAD_SELF; | |
32 | ||
40465600 AZ |
33 | int oldval = atomic_load_relaxed (&self->cancelhandling); |
34 | while (1) | |
35 | { | |
36 | int newval = (state == PTHREAD_CANCEL_DISABLE | |
37 | ? oldval | CANCELSTATE_BITMASK | |
38 | : oldval & ~CANCELSTATE_BITMASK); | |
39 | ||
40 | if (oldstate != NULL) | |
41 | *oldstate = ((oldval & CANCELSTATE_BITMASK) | |
42 | ? PTHREAD_CANCEL_DISABLE : PTHREAD_CANCEL_ENABLE); | |
43 | ||
44 | if (oldval == newval) | |
45 | break; | |
46 | ||
47 | if (atomic_compare_exchange_weak_acquire (&self->cancelhandling, | |
48 | &oldval, newval)) | |
49 | { | |
50 | if (cancel_enabled_and_canceled_and_async (newval)) | |
51 | __do_cancel (); | |
52 | ||
53 | break; | |
54 | } | |
55 | } | |
76a50749 UD |
56 | |
57 | return 0; | |
58 | } | |
93d78ec1 FW |
59 | libc_hidden_def (__pthread_setcancelstate) |
60 | weak_alias (__pthread_setcancelstate, pthread_setcancelstate) |