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- /* 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 <stdlib.h>
- #include "pthreadP.h"
- attribute_protected
- void *
- __pthread_getspecific (pthread_key_t key)
- {
- struct pthread_key_data *data;
- /* Special case access to the first 2nd-level block. This is the
- usual case. */
- if (__builtin_expect (key < PTHREAD_KEY_2NDLEVEL_SIZE, 1))
- data = &THREAD_SELF->specific_1stblock[key];
- else
- {
- /* Verify the key is sane. */
- if (key >= PTHREAD_KEYS_MAX)
- /* Not valid. */
- return NULL;
- unsigned int idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
- unsigned int idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
- /* If the sequence number doesn't match or the key cannot be defined
- for this thread since the second level array is not allocated
- return NULL, too. */
- struct pthread_key_data *level2 = THREAD_GETMEM_NC (THREAD_SELF,
- specific, idx1st);
- if (level2 == NULL)
- /* Not allocated, therefore no data. */
- return NULL;
- /* There is data. */
- data = &level2[idx2nd];
- }
- void *result = data->data;
- if (result != NULL)
- {
- uintptr_t seq = data->seq;
- if (__builtin_expect (seq != __pthread_keys[key].seq, 0))
- result = data->data = NULL;
- }
- return result;
- }
- strong_alias (__pthread_getspecific, pthread_getspecific)
- strong_alias (__pthread_getspecific, __pthread_getspecific_internal)
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