| /* Copyright (C) 2002-2014 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; |
| } |
