mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <errno.h>
|
|
#include "pthreadP.h"
|
|
#include <atomic.h>
|
|
|
|
|
|
int
|
|
pthread_detach (th)
|
|
pthread_t th;
|
|
{
|
|
struct pthread *pd = (struct pthread *) th;
|
|
|
|
/* Make sure the descriptor is valid. */
|
|
if (INVALID_NOT_TERMINATED_TD_P (pd))
|
|
/* Not a valid thread handle. */
|
|
return ESRCH;
|
|
|
|
int result = 0;
|
|
|
|
/* Mark the thread as detached. */
|
|
if (atomic_compare_and_exchange_bool_acq (&pd->joinid, pd, NULL))
|
|
{
|
|
/* There are two possibilities here. First, the thread might
|
|
already be detached. In this case we return EINVAL.
|
|
Otherwise there might already be a waiter. The standard does
|
|
not mention what happens in this case. */
|
|
if (IS_DETACHED (pd))
|
|
result = EINVAL;
|
|
}
|
|
else
|
|
/* Check whether the thread terminated meanwhile. In this case we
|
|
will just free the TCB. */
|
|
if ((pd->cancelhandling & EXITING_BITMASK) != 0)
|
|
/* Note that the code in __free_tcb makes sure each thread
|
|
control block is freed only once. */
|
|
__free_tcb (pd);
|
|
|
|
return result;
|
|
}
|