/* 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_key_delete (pthread_key_t key) { int result = EINVAL; if (__builtin_expect (key < PTHREAD_KEYS_MAX, 1)) { 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; }