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/* Validate a thread handle.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include "thread_dbP.h"
static td_err_e
check_thread_list (const td_thrhandle_t *th, psaddr_t head)
{
list_t list;
td_err_e result = TD_NOTHR;
if (ps_pdread (th->th_ta_p->ph, head, &list.next, sizeof (list.next))
!= PS_OK)
return TD_ERR; /* XXX Other error value? */
while (list.next != head)
if ((psaddr_t) list.next - offsetof (struct pthread, list)
== th->th_unique)
{
result = TD_OK;
break;
}
else if (ps_pdread (th->th_ta_p->ph, list.next, &list.next,
sizeof (list.next)) != PS_OK)
{
result = TD_ERR; /* XXX Other error value? */
break;
}
return result;
}
td_err_e
td_thr_validate (const td_thrhandle_t *th)
{
LOG ("td_thr_validate");
/* First check the list with threads using user allocated stacks. */
td_err_e result = check_thread_list (th, th->th_ta_p->stack_user);
/* If our thread is not on this list search the list with stack
using implementation allocated stacks. */
if (result == TD_NOTHR)
result = check_thread_list (th, th->th_ta_p->stack_used);
return result;
}
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