| 1 | /* pthread_setspecific. Generic version. |
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| 2 | Copyright (C) 2002-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <pthread.h> |
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| 20 | |
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| 21 | #include <pt-internal.h> |
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| 22 | |
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| 23 | int |
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| 24 | __pthread_setspecific (pthread_key_t key, const void *value) |
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| 25 | { |
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| 26 | struct __pthread *self = _pthread_self (); |
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| 27 | |
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| 28 | if (key < 0 || key >= __pthread_key_count) |
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| 29 | return EINVAL; |
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| 30 | |
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| 31 | if (self->thread_specifics == NULL) |
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| 32 | { |
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| 33 | if (key < PTHREAD_STATIC_KEYS) |
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| 34 | { |
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| 35 | self->static_thread_specifics[key] = (void *) value; |
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| 36 | return 0; |
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| 37 | } |
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| 38 | } |
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| 39 | |
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| 40 | if (key >= self->thread_specifics_size) |
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| 41 | { |
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| 42 | /* Amortize reallocation cost. */ |
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| 43 | int newsize = 2 * key + 1; |
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| 44 | void **new; |
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| 45 | |
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| 46 | if (self->thread_specifics == NULL) |
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| 47 | { |
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| 48 | self->thread_specifics_size = PTHREAD_STATIC_KEYS; |
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| 49 | new = malloc (newsize * sizeof (new[0])); |
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| 50 | if (new != NULL) |
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| 51 | memcpy (new, self->static_thread_specifics, |
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| 52 | PTHREAD_STATIC_KEYS * sizeof (new[0])); |
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| 53 | } |
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| 54 | else |
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| 55 | { |
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| 56 | new = realloc (self->thread_specifics, |
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| 57 | newsize * sizeof (new[0])); |
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| 58 | } |
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| 59 | if (new == NULL) |
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| 60 | return ENOMEM; |
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| 61 | |
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| 62 | memset (&new[self->thread_specifics_size], 0, |
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| 63 | (newsize - self->thread_specifics_size) * sizeof (new[0])); |
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| 64 | self->thread_specifics = new; |
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| 65 | self->thread_specifics_size = newsize; |
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| 66 | } |
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| 67 | |
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| 68 | self->thread_specifics[key] = (void *) value; |
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| 69 | return 0; |
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| 70 | } |
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| 71 | weak_alias (__pthread_setspecific, pthread_setspecific); |
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| 72 | hidden_def (__pthread_setspecific) |
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| 73 | |
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