mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* Copyright (C) 2002-2024 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 <errno.h>
|
|
#include "pthreadP.h"
|
|
#include <atomic.h>
|
|
#include <libc-lockP.h>
|
|
|
|
int
|
|
__pthread_setcancelstate (int state, int *oldstate)
|
|
{
|
|
volatile struct pthread *self;
|
|
|
|
if (state < PTHREAD_CANCEL_ENABLE || state > PTHREAD_CANCEL_DISABLE)
|
|
return EINVAL;
|
|
|
|
self = THREAD_SELF;
|
|
|
|
int oldval = atomic_load_relaxed (&self->cancelhandling);
|
|
while (1)
|
|
{
|
|
int newval = (state == PTHREAD_CANCEL_DISABLE
|
|
? oldval | CANCELSTATE_BITMASK
|
|
: oldval & ~CANCELSTATE_BITMASK);
|
|
|
|
if (oldstate != NULL)
|
|
*oldstate = ((oldval & CANCELSTATE_BITMASK)
|
|
? PTHREAD_CANCEL_DISABLE : PTHREAD_CANCEL_ENABLE);
|
|
|
|
if (oldval == newval)
|
|
break;
|
|
|
|
if (atomic_compare_exchange_weak_acquire (&self->cancelhandling,
|
|
&oldval, newval))
|
|
{
|
|
if (cancel_enabled_and_canceled_and_async (newval))
|
|
__do_cancel ();
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
libc_hidden_def (__pthread_setcancelstate)
|
|
weak_alias (__pthread_setcancelstate, pthread_setcancelstate)
|