| /* Copyright (C) 2002-2018 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_key_delete (pthread_key_t key) |
| { |
| int result = EINVAL; |
| |
| if (__glibc_likely (key < PTHREAD_KEYS_MAX)) |
| { |
| unsigned int seq = __pthread_keys[key].seq; |
| |
| if (__builtin_expect (! KEY_UNUSED (seq), 1) |
| && ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[key].seq, |
| seq + 1, seq)) |
| /* We deleted a valid key. */ |
| result = 0; |
| } |
| |
| return result; |
| } |
| weak_alias (__pthread_key_delete, pthread_key_delete) |
