706d1dee46
2002-07-15 Ulrich Drepper <drepper@redhat.com> * libio/wfileops.c (_IO_wfile_seekoff): Reposition wide pointers and adjust state for seek position. [PR libc/4070] * libio/Makefile (tests): Add bug-rewind. * libio/bug-rewind.c: New file.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* Map thread ID to 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_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)
|
|
{
|
|
if (pt % pthread_threads_max == 0)
|
|
{
|
|
/* The initial thread always exists but the thread library
|
|
might not yet be initialized. */
|
|
th->th_ta_p = (td_thragent_t *) ta;
|
|
th->th_unique = NULL;
|
|
|
|
return TD_OK;
|
|
}
|
|
|
|
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;
|
|
}
|