123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 |
- /* Copyright (C) 2002, 2003, 2006 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
- attribute_protected
- __pthread_setspecific (
- 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)
- strong_alias (__pthread_setspecific, __pthread_setspecific_internal)
|