Update.
[glibc.git] / linuxthreads_db / td_thr_clear_event.c
blobc027fc09fd0fa10c155260d1ab07549b6bf99236
1 /* Disable specific event for thread.
2 Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #include <stddef.h>
23 #include "thread_dbP.h"
26 td_err_e
27 td_thr_clear_event (th, event)
28 const td_thrhandle_t *th;
29 td_thr_events_t *event;
31 td_thr_events_t old_event;
32 int i;
34 LOG ("td_thr_clear_event");
36 /* If the thread descriptor has not yet been constructed do not do
37 anything. */
38 if (th->th_unique == NULL)
39 return TD_OK;
41 /* Write the new value into the thread data structure. */
42 if (ps_pdread (th->th_ta_p->ph,
43 ((char *) th->th_unique
44 + offsetof (struct _pthread_descr_struct,
45 p_eventbuf.eventmask)),
46 &old_event, sizeof (td_thrhandle_t)) != PS_OK)
47 return TD_ERR; /* XXX Other error value? */
49 /* Remove the set bits in. */
50 for (i = 0; i < TD_EVENTSIZE; ++i)
51 old_event.event_bits[i] &= ~event->event_bits[i];
53 /* Write the new value into the thread data structure. */
54 if (ps_pdwrite (th->th_ta_p->ph,
55 ((char *) th->th_unique
56 + offsetof (struct _pthread_descr_struct,
57 p_eventbuf.eventmask)),
58 &old_event, sizeof (td_thrhandle_t)) != PS_OK)
59 return TD_ERR; /* XXX Other error value? */
61 return TD_OK;