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glibc  2.9
td_ta_get_nthreads.c
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00001 /* Get the number of threads in the process.
00002    Copyright (C) 1999, 2001 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include "thread_dbP.h"
00022 
00023 td_err_e
00024 td_ta_get_nthreads (const td_thragent_t *ta, int *np)
00025 {
00026   psaddr_t addr;
00027 
00028   LOG ("td_ta_get_nthreads");
00029 
00030   /* Test whether the TA parameter is ok.  */
00031   if (! ta_ok (ta))
00032     return TD_BADTA;
00033 
00034   /* Access the variable `__pthread_handles_num'.  */
00035   if (td_lookup (ta->ph, PTHREAD_HANDLES_NUM, &addr) != PS_OK)
00036      return TD_ERR;  /* XXX Other error value?  */
00037 
00038   if (ps_pdread (ta->ph, addr, np, sizeof (int)) != PS_OK)
00039      return TD_ERR;  /* XXX Other error value?  */
00040 
00041   return TD_OK;
00042 }