/* 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)