libpthread/linuxthreads_db/td_ta_get_nthreads.c

   1 /* Get the number of threads in the process.
   2    Copyright (C) 1999, 2001 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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include "thread_dbP.h"
  21
  22 td_err_e
  23 td_ta_get_nthreads (const td_thragent_t *ta, int *np)
  24 {
  25   psaddr_t addr;
  26
  27   LOG ("td_ta_get_nthreads");
  28
  29   /* Test whether the TA parameter is ok.  */
  30   if (! ta_ok (ta))
  31     return TD_BADTA;
  32
  33   /* Access the variable `__pthread_handles_num'.  */
  34   if (td_lookup (ta->ph, PTHREAD_HANDLES_NUM, &addr) != PS_OK)
  35      return TD_ERR;     /* XXX Other error value?  */
  36
  37   if (ps_pdread (ta->ph, addr, np, sizeof (int)) != PS_OK)
  38      return TD_ERR;     /* XXX Other error value?  */
  39
  40   return TD_OK;
  41 }