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glibc  2.9
td_thr_event_enable.c
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00001 /* Enable event process-wide.
00002    Copyright (C) 1999, 2001, 2002 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 <stddef.h>
00022 
00023 #include "thread_dbP.h"
00024 
00025 
00026 td_err_e
00027 td_thr_event_enable (th, onoff)
00028      const td_thrhandle_t *th;
00029      int onoff;
00030 {
00031   LOG ("td_thr_event_enable");
00032 
00033   /* Write the new value into the thread data structure.  */
00034   if (th->th_unique == NULL)
00035     {
00036       psaddr_t addr;
00037 
00038       if (td_lookup (th->th_ta_p->ph, LINUXTHREADS_INITIAL_REPORT_EVENTS,
00039                    &addr) != PS_OK)
00040        /* Cannot read the symbol.  This should not happen.  */
00041        return TD_ERR;
00042 
00043       if (ps_pdwrite (th->th_ta_p->ph, addr, &onoff, sizeof (int)) != PS_OK)
00044        return TD_ERR;
00045 
00046       return TD_OK;
00047     }
00048 
00049   if (ps_pdwrite (th->th_ta_p->ph,
00050                 ((char *) th->th_unique
00051                  + offsetof (struct _pthread_descr_struct,
00052                             p_report_events)),
00053                 &onoff, sizeof (int)) != PS_OK)
00054     return TD_ERR;   /* XXX Other error value?  */
00055 
00056   return TD_OK;
00057 }