63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Cancel a thread.
|
|
Copyright (C) 2002-2018 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <pt-internal.h>
|
|
|
|
int
|
|
pthread_cancel (pthread_t t)
|
|
{
|
|
int err = 0;
|
|
struct __pthread *p;
|
|
|
|
p = __pthread_getid (t);
|
|
if (p == NULL)
|
|
return ESRCH;
|
|
|
|
__pthread_mutex_lock (&p->cancel_lock);
|
|
if (p->cancel_pending)
|
|
{
|
|
__pthread_mutex_unlock (&p->cancel_lock);
|
|
return 0;
|
|
}
|
|
|
|
p->cancel_pending = 1;
|
|
|
|
if (p->cancel_state != PTHREAD_CANCEL_ENABLE)
|
|
{
|
|
__pthread_mutex_unlock (&p->cancel_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (p->cancel_type == PTHREAD_CANCEL_ASYNCHRONOUS)
|
|
/* CANCEL_LOCK is unlocked by this call. */
|
|
err = __pthread_do_cancel (p);
|
|
else
|
|
{
|
|
if (p->cancel_hook != NULL)
|
|
/* Thread blocking on a cancellation point. Invoke hook to unblock.
|
|
See __pthread_cond_timedwait_internal. */
|
|
p->cancel_hook (p->cancel_hook_arg);
|
|
|
|
__pthread_mutex_unlock (&p->cancel_lock);
|
|
}
|
|
|
|
return err;
|
|
}
|