linuxthreads_db/td_ta_get_nthreads.c

   1 /* Get the number of threads in the process.
   2    Copyright (C) 1999 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 Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    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    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "thread_dbP.h"
  22 #include <gnu/lib-names.h>
  23
  24 td_err_e
  25 td_ta_get_nthreads (const td_thragent_t *ta, int *np)
  26 {
  27   psaddr_t addr;
  28
  29   LOG (__FUNCTION__);
  30
  31   /* Test whether the TA parameter is ok.  */
  32   if (! ta_ok (ta))
  33     return TD_BADTA;
  34
  35   /* Access the variable `__pthread_handles_num'.  */
  36   if (ps_pglobal_lookup (ta->ph, LIBPTHREAD_SO, "__pthread_handles_num",
  37                          &addr) != PS_OK)
  38      return TD_ERR;     /* XXX Other error value?  */
  39
  40   if (ps_pdread (ta->ph, addr, np, sizeof (int)) != PS_OK)
  41      return TD_ERR;     /* XXX Other error value?  */
  42
  43   return TD_OK;
  44 }