1 /* Enable specific event for thread.
2 Copyright (C) 1999, 2001, 2002, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
5
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.
10
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.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20 #include <stddef.h>
21
22 #include "thread_dbP.h"
23
24
25 td_err_e
td_thr_set_event(const td_thrhandle_t * th,td_thr_events_t * event)26 td_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *event)
27 {
28 td_thr_events_t old_event;
29 int i;
30
31 LOG ("td_thr_set_event");
32
33 /* What shall we do if no thread descriptor exists but the user
34 wants to set an event? */
35 if (th->th_unique == NULL)
36 return TD_NOTALLOC;
37
38 /* Write the new value into the thread data structure. */
39 if (ps_pdread (th->th_ta_p->ph,
40 ((char *) th->th_unique
41 + offsetof (struct _pthread_descr_struct,
42 p_eventbuf.eventmask)),
43 &old_event, sizeof (td_thr_events_t)) != PS_OK)
44 return TD_ERR; /* XXX Other error value? */
45
46 /* Or the new bits in. */
47 for (i = 0; i < TD_EVENTSIZE; ++i)
48 old_event.event_bits[i] |= event->event_bits[i];
49
50 /* Write the new value into the thread data structure. */
51 if (ps_pdwrite (th->th_ta_p->ph,
52 ((char *) th->th_unique
53 + offsetof (struct _pthread_descr_struct,
54 p_eventbuf.eventmask)),
55 &old_event, sizeof (td_thr_events_t)) != PS_OK)
56 return TD_ERR; /* XXX Other error value? */
57
58 return TD_OK;
59 }
60