libpthread/linuxthreads_db/td_ta_tsd_iter.c

   1 /* Iterate over a process's thread-specific data.
   2    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include "thread_dbP.h"
  21 #include <alloca.h>
  22
  23 td_err_e
  24 td_ta_tsd_iter (const td_thragent_t *ta, td_key_iter_f *callback,
  25                 void *cbdata_p)
  26 {
  27   struct pthread_key_struct *keys;
  28   int pthread_keys_max;
  29   int cnt;
  30
  31   LOG ("td_ta_tsd_iter");
  32
  33   /* Test whether the TA parameter is ok.  */
  34   if (! ta_ok (ta))
  35     return TD_BADTA;
  36
  37   pthread_keys_max = ta->pthread_keys_max;
  38   keys = (struct pthread_key_struct *) alloca (sizeof (keys[0])
  39                                                * pthread_keys_max);
  40
  41   /* Read all the information about the keys.  */
  42   if (ps_pdread (ta->ph, ta->keys, keys,
  43                  sizeof (keys[0]) * pthread_keys_max) != PS_OK)
  44         return TD_ERR;  /* XXX Other error value?  */
  45
  46   /* Now get all descriptors, one after the other.  */
  47   for (cnt = 0; cnt < pthread_keys_max; ++cnt)
  48     if (keys[cnt].in_use
  49         /* Return with an error if the callback returns a nonzero value.  */
  50         && callback (cnt, keys[cnt].destr, cbdata_p) != 0)
  51       return TD_DBERR;
  52
  53   return TD_OK;
  54 }