1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 __pthread_getspecific (key)
28 struct pthread_key_data *data;
30 /* Special case access to the first 2nd-level block. This is the
32 if (__builtin_expect (key < PTHREAD_KEY_2NDLEVEL_SIZE, 1))
33 data = &THREAD_SELF->specific_1stblock[key];
36 /* Verify the key is sane. */
37 if (key >= PTHREAD_KEYS_MAX)
41 unsigned int idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE;
42 unsigned int idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE;
44 /* If the sequence number doesn't match or the key cannot be defined
45 for this thread since the second level array is not allocated
47 struct pthread_key_data *level2 = THREAD_GETMEM_NC (THREAD_SELF,
50 /* Not allocated, therefore no data. */
54 data = &level2[idx2nd];
57 void *result = data->data;
60 uintptr_t seq = data->seq;
62 if (__builtin_expect (seq != __pthread_keys[key].seq, 0))
63 result = data->data = NULL;
68 strong_alias (__pthread_getspecific, pthread_getspecific)
69 strong_alias (__pthread_getspecific, __pthread_getspecific_internal)