1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
22 #include <futex-internal.h>
25 /* The next two functions are similar to pthread_setcanceltype() but
26 more specialized for the use in the cancelable functions like write().
27 They do not need to check parameters etc. These functions must be
28 AS-safe, with the exception of the actual cancellation, because they
29 are called by wrappers around AS-safe functions like write().*/
31 __pthread_enable_asynccancel (void)
33 struct pthread
*self
= THREAD_SELF
;
35 int oldval
= THREAD_GETMEM (self
, canceltype
);
36 THREAD_SETMEM (self
, canceltype
, PTHREAD_CANCEL_ASYNCHRONOUS
);
38 int ch
= THREAD_GETMEM (self
, cancelhandling
);
40 if (self
->cancelstate
== PTHREAD_CANCEL_ENABLE
41 && (ch
& CANCELED_BITMASK
)
42 && !(ch
& EXITING_BITMASK
)
43 && !(ch
& TERMINATED_BITMASK
))
45 THREAD_SETMEM (self
, result
, PTHREAD_CANCELED
);
51 libc_hidden_def (__pthread_enable_asynccancel
)
53 /* See the comment for __pthread_enable_asynccancel regarding
54 the AS-safety of this function. */
56 __pthread_disable_asynccancel (int oldtype
)
58 /* If asynchronous cancellation was enabled before we do not have
60 if (oldtype
== PTHREAD_CANCEL_ASYNCHRONOUS
)
63 struct pthread
*self
= THREAD_SELF
;
64 self
->canceltype
= PTHREAD_CANCEL_DEFERRED
;
66 libc_hidden_def (__pthread_disable_asynccancel
)