/* Get a thread-specific data pointer for a thread. Copyright (C) 1999,2001,2002,2003 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, see <http://www.gnu.org/licenses/>. */ #include "thread_dbP.h" td_err_e td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data) { td_err_e err; psaddr_t tk_seq, level1, level2, seq, value; void *copy; uint32_t pthread_key_2ndlevel_size, idx1st, idx2nd; LOG ("td_thr_tsd"); /* Get the key entry. */ err = DB_GET_VALUE (tk_seq, th->th_ta_p, __pthread_keys, tk); if (err == TD_NOAPLIC) return TD_BADKEY; if (err != TD_OK) return err; /* Fail if this key is not at all used. */ if (((uintptr_t) tk_seq & 1) == 0) return TD_BADKEY; /* This makes sure we have the size information on hand. */ err = DB_GET_FIELD_ADDRESS (level2, th->th_ta_p, 0, pthread_key_data_level2, data, 1); if (err != TD_OK) return err; /* Compute the indeces. */ pthread_key_2ndlevel_size = DB_DESC_NELEM (th->th_ta_p->ta_field_pthread_key_data_level2_data); idx1st = tk / pthread_key_2ndlevel_size; idx2nd = tk % pthread_key_2ndlevel_size; /* Now fetch the first level pointer. */ err = DB_GET_FIELD (level1, th->th_ta_p, th->th_unique, pthread, specific, idx1st); if (err == TD_NOAPLIC) return TD_DBERR; if (err != TD_OK) return err; /* Check the pointer to the second level array. */ if (level1 == 0) return TD_NOTSD; /* Locate the element within the second level array. */ err = DB_GET_FIELD_ADDRESS (level2, th->th_ta_p, level1, pthread_key_data_level2, data, idx2nd); if (err == TD_NOAPLIC) return TD_DBERR; if (err != TD_OK) return err; /* Now copy in that whole structure. */ err = DB_GET_STRUCT (copy, th->th_ta_p, level2, pthread_key_data); if (err != TD_OK) return err; /* Check whether the data is valid. */ err = DB_GET_FIELD_LOCAL (seq, th->th_ta_p, copy, pthread_key_data, seq, 0); if (err != TD_OK) return err; if (seq != tk_seq) return TD_NOTSD; /* Finally, fetch the value. */ err = DB_GET_FIELD_LOCAL (value, th->th_ta_p, copy, pthread_key_data, data, 0); if (err == TD_OK) *data = value; return err; }