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/* Validate a thread handle.
Copyright (C) 1999, 2001, 2002 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"
#include <linuxthreads/internals.h>
td_err_e
td_thr_validate (const td_thrhandle_t *th)
{
struct pthread_handle_struct *handles = th->th_ta_p->handles;
int pthread_threads_max = th->th_ta_p->pthread_threads_max;
int cnt;
struct pthread_handle_struct phc;
LOG ("td_thr_validate");
/* A special case: if the program just starts up the handle is
NULL. */
if (th->th_unique == NULL)
{
/* Read the first handle. If the pointer to the thread
descriptor is not NULL this is an error. */
if (ps_pdread (th->th_ta_p->ph, handles, &phc,
sizeof (struct pthread_handle_struct)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
return phc.h_descr == NULL ? TD_OK : TD_NOTHR;
}
/* Now get all descriptors, one after the other. */
for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles)
{
if (ps_pdread (th->th_ta_p->ph, handles, &phc,
sizeof (struct pthread_handle_struct)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
if (phc.h_descr != NULL && phc.h_descr == th->th_unique)
{
struct _pthread_descr_struct pds;
if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds,
th->th_ta_p->sizeof_descr) != PS_OK)
return TD_ERR; /* XXX Other error value? */
/* XXX There should be another test using the TID but this is
currently not available. */
return pds.p_terminated != 0 ? TD_NOTHR : TD_OK;
}
}
return TD_ERR;
}
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