| /* Copyright (C) 2002-2014 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 <errno.h> |
| #include <stdlib.h> |
| #include "pthreadP.h" |
| |
| |
| int |
| __pthread_setspecific (key, value) |
| pthread_key_t key; |
| const void *value; |
| { |
| struct pthread *self; |
| unsigned int idx1st; |
| unsigned int idx2nd; |
| struct pthread_key_data *level2; |
| unsigned int seq; |
| |
| self = THREAD_SELF; |
| |
| /* Special case access to the first 2nd-level block. This is the |
| usual case. */ |
| if (__builtin_expect (key < PTHREAD_KEY_2NDLEVEL_SIZE, 1)) |
| { |
| /* Verify the key is sane. */ |
| if (KEY_UNUSED ((seq = __pthread_keys[key].seq))) |
| /* Not valid. */ |
| return EINVAL; |
| |
| level2 = &self->specific_1stblock[key]; |
| |
| /* Remember that we stored at least one set of data. */ |
| if (value != NULL) |
| THREAD_SETMEM (self, specific_used, true); |
| } |
| else |
| { |
| if (key >= PTHREAD_KEYS_MAX |
| || KEY_UNUSED ((seq = __pthread_keys[key].seq))) |
| /* Not valid. */ |
| return EINVAL; |
| |
| idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; |
| idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; |
| |
| /* This is the second level array. Allocate it if necessary. */ |
| level2 = THREAD_GETMEM_NC (self, specific, idx1st); |
| if (level2 == NULL) |
| { |
| if (value == NULL) |
| /* We don't have to do anything. The value would in any case |
| be NULL. We can save the memory allocation. */ |
| return 0; |
| |
| level2 |
| = (struct pthread_key_data *) calloc (PTHREAD_KEY_2NDLEVEL_SIZE, |
| sizeof (*level2)); |
| if (level2 == NULL) |
| return ENOMEM; |
| |
| THREAD_SETMEM_NC (self, specific, idx1st, level2); |
| } |
| |
| /* Pointer to the right array element. */ |
| level2 = &level2[idx2nd]; |
| |
| /* Remember that we stored at least one set of data. */ |
| THREAD_SETMEM (self, specific_used, true); |
| } |
| |
| /* Store the data and the sequence number so that we can recognize |
| stale data. */ |
| level2->seq = seq; |
| level2->data = (void *) value; |
| |
| return 0; |
| } |
| strong_alias (__pthread_setspecific, pthread_setspecific) |
| hidden_def (__pthread_setspecific) |
