1 /* pthread_setspecific. Generic version.
2 Copyright (C) 2002-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <pthread.h>
20
21 #include <pt-internal.h>
22
23 int
__pthread_setspecific(pthread_key_t key,const void * value)24 __pthread_setspecific (pthread_key_t key, const void *value)
25 {
26 struct __pthread *self = _pthread_self ();
27
28 if (key < 0 || key >= __pthread_key_count
29 || __pthread_key_destructors[key] == PTHREAD_KEY_INVALID)
30 return EINVAL;
31
32 if (key >= self->thread_specifics_size)
33 {
34 /* Amortize reallocation cost. */
35 int newsize = 2 * key + 1;
36 void **new = realloc (self->thread_specifics,
37 newsize * sizeof (new[0]));
38 if (new == NULL)
39 return ENOMEM;
40
41 memset (&new[self->thread_specifics_size], 0,
42 (newsize - self->thread_specifics_size) * sizeof (new[0]));
43 self->thread_specifics = new;
44 self->thread_specifics_size = newsize;
45 }
46
47 self->thread_specifics[key] = (void *) value;
48 return 0;
49 }
50 weak_alias (__pthread_setspecific, pthread_setspecific);
51 hidden_def (__pthread_setspecific)
52