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/* Get a thread-specific data pointer for a thread.
Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include "thread_dbP.h"
td_err_e
td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data)
{
LOG ("td_thr_tsd");
/* Check correct value of key. */
if (tk >= th->th_ta_p->pthread_keys_max)
return TD_BADKEY;
/* Get the key entry. */
uintptr_t seq;
if (ps_pdread (th->th_ta_p->ph, &th->th_ta_p->keys[tk].seq, &seq,
sizeof (uintptr_t)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* Fail if this key is not at all used. */
if (KEY_UNUSED (seq))
return TD_BADKEY;
/* Compute the indeces. */
int pthread_key_2ndlevel_size = th->th_ta_p->pthread_key_2ndlevel_size;
unsigned int idx1st = tk / pthread_key_2ndlevel_size;
unsigned int idx2nd = tk % pthread_key_2ndlevel_size;
struct pthread_key_data *level1;
if (ps_pdread (th->th_ta_p->ph,
&((struct pthread *) th->th_unique)->specific[idx1st],
&level1, sizeof (level1)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* Check the pointer to the second level array. */
if (level1 == NULL)
return TD_NOTSD;
struct pthread_key_data level2;
if (ps_pdread (th->th_ta_p->ph, &level1[idx2nd], &level2,
sizeof (level2)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* Check whether the data is valid. */
if (level2.seq != seq)
return TD_NOTSD;
if (level2.data != NULL)
*data = level2.data;
return TD_OK;
}
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