blob: 44f841784510e1dd825054749dc4fb119b697d57 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <setjmp.h>
#include <stdlib.h>
#include "pthreadP.h"
#include <futex-internal.h>
/* The next two functions are similar to pthread_setcanceltype() but
more specialized for the use in the cancelable functions like write().
They do not need to check parameters etc. These functions must be
AS-safe, with the exception of the actual cancellation, because they
are called by wrappers around AS-safe functions like write().*/
int
__pthread_enable_asynccancel (void)
{
struct pthread *self = THREAD_SELF;
int oldval = THREAD_GETMEM (self, canceltype);
THREAD_SETMEM (self, canceltype, PTHREAD_CANCEL_ASYNCHRONOUS);
int ch = THREAD_GETMEM (self, cancelhandling);
if (self->cancelstate == PTHREAD_CANCEL_ENABLE
&& (ch & CANCELED_BITMASK)
&& !(ch & EXITING_BITMASK)
&& !(ch & TERMINATED_BITMASK))
{
THREAD_SETMEM (self, result, PTHREAD_CANCELED);
__do_cancel ();
}
return oldval;
}
libc_hidden_def (__pthread_enable_asynccancel)
/* See the comment for __pthread_enable_asynccancel regarding
the AS-safety of this function. */
void
__pthread_disable_asynccancel (int oldtype)
{
/* If asynchronous cancellation was enabled before we do not have
anything to do. */
if (oldtype == PTHREAD_CANCEL_ASYNCHRONOUS)
return;
struct pthread *self = THREAD_SELF;
self->canceltype = PTHREAD_CANCEL_DEFERRED;
}
libc_hidden_def (__pthread_disable_asynccancel)
|
