1/* Cancel a thread.
2 Copyright (C) 2002-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <pthread.h>
20#include <hurd/signal.h>
21
22#include <pt-internal.h>
23#include <pthreadP.h>
24
25static void
26call_exit (void)
27{
28 __pthread_exit (value: 0);
29}
30
31int
32__pthread_do_cancel (struct __pthread *p)
33{
34 mach_port_t ktid;
35 int me;
36
37 assert (p->cancel_pending == 1);
38 assert (p->cancel_state == PTHREAD_CANCEL_ENABLE);
39
40 __pthread_mutex_unlock (mutex: &p->cancel_lock);
41
42 ktid = __mach_thread_self ();
43 me = p->kernel_thread == ktid;
44 __mach_port_deallocate (__mach_task_self (), ktid);
45
46 if (me)
47 call_exit ();
48 else
49 {
50 error_t err;
51 struct hurd_sigstate *ss = _hurd_thread_sigstate (p->kernel_thread);
52
53 __spin_lock (&ss->critical_section_lock);
54 __spin_lock (&ss->lock);
55
56 err = __thread_suspend (p->kernel_thread);
57 assert_perror (err);
58
59 __spin_unlock (&ss->lock);
60
61 err = __thread_abort (p->kernel_thread);
62 assert_perror (err);
63
64 err = __thread_set_pcsptp (p->kernel_thread,
65 1, (void *) call_exit, 0, 0, 0, 0);
66 assert_perror (err);
67
68 err = __thread_resume (p->kernel_thread);
69 assert_perror (err);
70
71 _hurd_critical_section_unlock (ss);
72 }
73
74 return 0;
75}
76

source code of glibc/sysdeps/mach/hurd/htl/pt-docancel.c