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glibc  2.9
td_thr_set_event.c
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00001 /* Enable specific event for thread.
00002    Copyright (C) 1999,2001,2002,2003 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@redhat.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_set_event (th, event)
00028      const td_thrhandle_t *th;
00029      td_thr_events_t *event;
00030 {
00031   td_err_e err;
00032   psaddr_t eventmask;
00033   void *copy;
00034 
00035   LOG ("td_thr_set_event");
00036 
00037   /* Fetch the old event mask from the inferior and modify it in place.  */
00038   err = DB_GET_FIELD_ADDRESS (eventmask, th->th_ta_p,
00039                            th->th_unique, pthread, eventbuf_eventmask, 0);
00040   if (err == TD_OK)
00041     err = DB_GET_STRUCT (copy, th->th_ta_p, eventmask, td_thr_events_t);
00042   if (err == TD_OK)
00043     {
00044       uint32_t idx;
00045       for (idx = 0; idx < TD_EVENTSIZE; ++idx)
00046        {
00047          psaddr_t word;
00048          uint32_t mask;
00049          err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy,
00050                                 td_thr_events_t, event_bits, idx);
00051          if (err != TD_OK)
00052            break;
00053          mask = (uintptr_t) word;
00054          mask |= event->event_bits[idx];
00055          word = (psaddr_t) (uintptr_t) mask;
00056          err = DB_PUT_FIELD_LOCAL (th->th_ta_p, copy,
00057                                 td_thr_events_t, event_bits, idx, word);
00058          if (err != TD_OK)
00059            break;
00060        }
00061       if (err == TD_NOAPLIC)
00062        {
00063          err = TD_OK;
00064          while (idx < TD_EVENTSIZE)
00065            if (event->event_bits[idx++] != 0)
00066              {
00067               err = TD_NOEVENT;
00068               break;
00069              }
00070        }
00071       if (err == TD_OK)
00072        /* Now write it back to the inferior.  */
00073        err = DB_PUT_STRUCT (th->th_ta_p, eventmask, td_thr_events_t, copy);
00074     }
00075 
00076   return err;
00077 }