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/* Globally disable events.
Copyright (C) 1999-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdint.h>
#include "thread_dbP.h"
td_err_e
td_ta_clear_event (const td_thragent_t *ta_arg, td_thr_events_t *event)
{
td_thragent_t *const ta = (td_thragent_t *) ta_arg;
td_err_e err;
psaddr_t eventmask = 0;
void *copy = NULL;
LOG ("td_ta_clear_event");
/* Test whether the TA parameter is ok. */
if (! ta_ok (ta))
return TD_BADTA;
/* Fetch the old event mask from the inferior and modify it in place. */
err = DB_GET_SYMBOL (eventmask, ta, __nptl_threads_events);
if (err == TD_OK)
err = DB_GET_STRUCT (copy, ta, eventmask, td_thr_events_t);
if (err == TD_OK)
{
uint32_t idx;
for (idx = 0; idx < TD_EVENTSIZE; ++idx)
{
psaddr_t word;
uint32_t mask;
err = DB_GET_FIELD_LOCAL (word, ta, copy,
td_thr_events_t, event_bits, idx);
if (err != TD_OK)
break;
mask = (uintptr_t) word;
mask &= ~event->event_bits[idx];
word = (psaddr_t) (uintptr_t) mask;
err = DB_PUT_FIELD_LOCAL (ta, copy,
td_thr_events_t, event_bits, idx, word);
if (err != TD_OK)
break;
}
if (err == TD_NOAPLIC)
{
err = TD_OK;
while (idx < TD_EVENTSIZE)
if (event->event_bits[idx++] != 0)
{
err = TD_NOEVENT;
break;
}
}
if (err == TD_OK)
/* Now write it back to the inferior. */
err = DB_PUT_STRUCT (ta, eventmask, td_thr_events_t, copy);
}
return err;
}
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