1/* Globally disable events.
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 <stdint.h>
21#include "thread_dbP.h"
22
23
24td_err_e
25td_ta_clear_event (const td_thragent_t *ta_arg, td_thr_events_t *event)
26{
27 td_thragent_t *const ta = (td_thragent_t *) ta_arg;
28 td_err_e err;
29 psaddr_t eventmask = 0;
30 void *copy = NULL;
31
32 LOG ("td_ta_clear_event");
33
34 /* Test whether the TA parameter is ok. */
35 if (! ta_ok (ta))
36 return TD_BADTA;
37
38 /* Fetch the old event mask from the inferior and modify it in place. */
39 err = DB_GET_SYMBOL (eventmask, ta, __nptl_threads_events);
40 if (err == TD_OK)
41 err = DB_GET_STRUCT (copy, ta, eventmask, td_thr_events_t);
42 if (err == TD_OK)
43 {
44 uint32_t idx;
45 for (idx = 0; idx < TD_EVENTSIZE; ++idx)
46 {
47 psaddr_t word;
48 uint32_t mask;
49 err = DB_GET_FIELD_LOCAL (word, ta, copy,
50 td_thr_events_t, event_bits, idx);
51 if (err != TD_OK)
52 break;
53 mask = (uintptr_t) word;
54 mask &= ~event->event_bits[idx];
55 word = (psaddr_t) (uintptr_t) mask;
56 err = DB_PUT_FIELD_LOCAL (ta, copy,
57 td_thr_events_t, event_bits, idx, word);
58 if (err != TD_OK)
59 break;
60 }
61 if (err == TD_NOAPLIC)
62 {
63 err = TD_OK;
64 while (idx < TD_EVENTSIZE)
65 if (event->event_bits[idx++] != 0)
66 {
67 err = TD_NOEVENT;
68 break;
69 }
70 }
71 if (err == TD_OK)
72 /* Now write it back to the inferior. */
73 err = DB_PUT_STRUCT (ta, eventmask, td_thr_events_t, copy);
74 }
75
76 return err;
77}
78