Subversion Repositories openrisc_2011-10-31

/* Map thread ID to thread handle.

   Copyright (C) 1999, 2001 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.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_ta_map_id2thr (const td_thragent_t *ta, pthread_t pt, td_thrhandle_t *th)

{

  struct pthread_handle_struct phc;

  struct _pthread_descr_struct pds;

  int pthread_threads_max;

  LOG ("td_ta_map_id2thr");

  /* Test whether the TA parameter is ok.  */

  if (! ta_ok (ta))

    return TD_BADTA;

  /* Make the following expression a bit smaller.  */

  pthread_threads_max = ta->pthread_threads_max;

  /* We can compute the entry in the handle array we want.  */

  if (ps_pdread (ta->ph, ta->handles + pt % pthread_threads_max, &phc,

                 sizeof (struct pthread_handle_struct)) != PS_OK)

    return TD_ERR;      /* XXX Other error value?  */

  /* Test whether this entry is in use.  */

  if (phc.h_descr == NULL)

    return TD_BADTH;

  /* Next test: get the descriptor to see whether this is not an old

     thread handle.  */

  if (ps_pdread (ta->ph, phc.h_descr, &pds,

                 sizeof (struct _pthread_descr_struct)) != PS_OK)

    return TD_ERR;      /* XXX Other error value?  */

  if (pds.p_tid != pt)

    return TD_BADTH;

  if (pds.p_terminated != 0)

    return TD_NOTHR;

  /* Create the `td_thrhandle_t' object.  */

  th->th_ta_p = (td_thragent_t *) ta;

  th->th_unique = phc.h_descr;

  return TD_OK;

}