1/* Copyright (C) 2002-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include "pthreadP.h"
20#include <atomic.h>
21#include <shlib-compat.h>
22
23int
24___pthread_key_delete (pthread_key_t key)
25{
26 int result = EINVAL;
27
28 if (__glibc_likely (key < PTHREAD_KEYS_MAX))
29 {
30 unsigned int seq = __pthread_keys[key].seq;
31
32 if (__builtin_expect (! KEY_UNUSED (seq), 1)
33 && ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[key].seq,
34 seq + 1, seq))
35 /* We deleted a valid key. */
36 result = 0;
37 }
38
39 return result;
40}
41versioned_symbol (libc, ___pthread_key_delete, pthread_key_delete,
42 GLIBC_2_34);
43libc_hidden_ver (___pthread_key_delete, __pthread_key_delete)
44#ifndef SHARED
45strong_alias (___pthread_key_delete, __pthread_key_delete)
46#endif
47
48#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34)
49compat_symbol (libpthread, ___pthread_key_delete, pthread_key_delete,
50 GLIBC_2_0);
51#endif
52