96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/* 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
|
|
__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)
|
|
strong_alias (__pthread_setspecific, __pthread_setspecific_internal)
|