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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, 2005 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_set_event (th, event)
00028      const td_thrhandle_t *th;
00029      td_thr_events_t *event;
00030 {
00031   td_thr_events_t old_event;
00032   int i;
00033 
00034   LOG ("td_thr_set_event");
00035 
00036   /* What shall we do if no thread descriptor exists but the user
00037      wants to set an event?  */
00038   if (th->th_unique == NULL)
00039     return TD_NOTALLOC;
00040 
00041   /* Write the new value into the thread data structure.  */
00042   if (ps_pdread (th->th_ta_p->ph,
00043                ((char *) th->th_unique
00044                 + offsetof (struct _pthread_descr_struct,
00045                            p_eventbuf.eventmask)),
00046                &old_event, sizeof (td_thr_events_t)) != PS_OK)
00047     return TD_ERR;   /* XXX Other error value?  */
00048 
00049   /* Or the new bits in.  */
00050   for (i = 0; i < TD_EVENTSIZE; ++i)
00051     old_event.event_bits[i] |= event->event_bits[i];
00052 
00053   /* Write the new value into the thread data structure.  */
00054   if (ps_pdwrite (th->th_ta_p->ph,
00055                 ((char *) th->th_unique
00056                  + offsetof (struct _pthread_descr_struct,
00057                             p_eventbuf.eventmask)),
00058                 &old_event, sizeof (td_thr_events_t)) != PS_OK)
00059     return TD_ERR;   /* XXX Other error value?  */
00060 
00061   return TD_OK;
00062 }