1/* Disable specific event for thread.
2 Copyright (C) 1999-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.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 <https://www.gnu.org/licenses/>. */
19
20#include <stddef.h>
21#include <stdint.h>
22
23#include "thread_dbP.h"
24
25
26td_err_e
27td_thr_clear_event (const td_thrhandle_t *th, td_thr_events_t *event)
28{
29 td_err_e err;
30 psaddr_t eventmask;
31 void *copy;
32
33 LOG ("td_thr_clear_event");
34
35 /* Fetch the old event mask from the inferior and modify it in place. */
36 err = DB_GET_FIELD_ADDRESS (eventmask, th->th_ta_p,
37 th->th_unique, pthread, eventbuf_eventmask, 0);
38 if (err == TD_OK)
39 err = DB_GET_STRUCT (copy, th->th_ta_p, eventmask, td_thr_events_t);
40 if (err == TD_OK)
41 {
42 uint32_t idx;
43 for (idx = 0; idx < TD_EVENTSIZE; ++idx)
44 {
45 psaddr_t word;
46 uint32_t mask;
47 err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy,
48 td_thr_events_t, event_bits, idx);
49 if (err != TD_OK)
50 break;
51 mask = (uintptr_t) word;
52 mask &= ~event->event_bits[idx];
53 word = (psaddr_t) (uintptr_t) mask;
54 err = DB_PUT_FIELD_LOCAL (th->th_ta_p, copy,
55 td_thr_events_t, event_bits, idx, word);
56 if (err != TD_OK)
57 break;
58 }
59 if (err == TD_NOAPLIC)
60 {
61 err = TD_OK;
62 while (idx < TD_EVENTSIZE)
63 if (event->event_bits[idx++] != 0)
64 {
65 err = TD_NOEVENT;
66 break;
67 }
68 }
69 if (err == TD_OK)
70 /* Now write it back to the inferior. */
71 err = DB_PUT_STRUCT (th->th_ta_p, eventmask, td_thr_events_t, copy);
72 }
73
74 return err;
75}
76