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/* pthread_setspecific. Generic version.
Copyright (C) 2002-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <pt-internal.h>
int
__pthread_setspecific (pthread_key_t key, const void *value)
{
struct __pthread *self = _pthread_self ();
if (key < 0 || key >= __pthread_key_count)
return EINVAL;
if (self->thread_specifics == NULL)
{
if (key < PTHREAD_STATIC_KEYS)
{
self->static_thread_specifics[key] = (void *) value;
return 0;
}
}
if (key >= self->thread_specifics_size)
{
/* Amortize reallocation cost. */
int newsize = 2 * key + 1;
void **new;
if (self->thread_specifics == NULL)
{
self->thread_specifics_size = PTHREAD_STATIC_KEYS;
new = malloc (newsize * sizeof (new[0]));
if (new != NULL)
memcpy (new, self->static_thread_specifics,
PTHREAD_STATIC_KEYS * sizeof (new[0]));
}
else
{
new = realloc (self->thread_specifics,
newsize * sizeof (new[0]));
}
if (new == NULL)
return ENOMEM;
memset (&new[self->thread_specifics_size], 0,
(newsize - self->thread_specifics_size) * sizeof (new[0]));
self->thread_specifics = new;
self->thread_specifics_size = newsize;
}
self->thread_specifics[key] = (void *) value;
return 0;
}
weak_alias (__pthread_setspecific, pthread_setspecific);
hidden_def (__pthread_setspecific)
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