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76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* Disable specific event for thread.
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Copyright (C) 1999-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stddef.h>
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#include <stdint.h>
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#include "thread_dbP.h"
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td_err_e
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td_thr_clear_event (const td_thrhandle_t *th, td_thr_events_t *event)
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{
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td_err_e err;
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psaddr_t eventmask;
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void *copy;
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LOG ("td_thr_clear_event");
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/* Fetch the old event mask from the inferior and modify it in place. */
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err = DB_GET_FIELD_ADDRESS (eventmask, th->th_ta_p,
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th->th_unique, pthread, eventbuf_eventmask, 0);
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if (err == TD_OK)
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err = DB_GET_STRUCT (copy, th->th_ta_p, eventmask, td_thr_events_t);
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if (err == TD_OK)
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{
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uint32_t idx;
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for (idx = 0; idx < TD_EVENTSIZE; ++idx)
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{
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psaddr_t word;
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uint32_t mask;
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err = DB_GET_FIELD_LOCAL (word, th->th_ta_p, copy,
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td_thr_events_t, event_bits, idx);
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if (err != TD_OK)
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break;
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mask = (uintptr_t) word;
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mask &= ~event->event_bits[idx];
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word = (psaddr_t) (uintptr_t) mask;
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err = DB_PUT_FIELD_LOCAL (th->th_ta_p, copy,
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td_thr_events_t, event_bits, idx, word);
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if (err != TD_OK)
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break;
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}
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if (err == TD_NOAPLIC)
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{
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err = TD_OK;
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while (idx < TD_EVENTSIZE)
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if (event->event_bits[idx++] != 0)
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{
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err = TD_NOEVENT;
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break;
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}
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}
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if (err == TD_OK)
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/* Now write it back to the inferior. */
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err = DB_PUT_STRUCT (th->th_ta_p, eventmask, td_thr_events_t, copy);
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}
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return err;
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}
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