uclibc-ng/libpthread/linuxthreads_db/td_ta_clear_event.c

/* Globally disable events.
   Copyright (C) 1999, 2001, 2005 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.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
   <http://www.gnu.org/licenses/>.  */

#include "thread_dbP.h"


td_err_e
td_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *event)
{
  td_thr_events_t old_event;
  int i;

  LOG ("td_ta_clear_event");

  /* Test whether the TA parameter is ok.  */
  if (! ta_ok (ta))
    return TD_BADTA;

  /* Write the new value into the thread data structure.  */
  if (ps_pdread (ta->ph, ta->pthread_threads_eventsp,
		 &old_event, sizeof (td_thr_events_t)) != PS_OK)
    return TD_ERR;	/* XXX Other error value?  */

  /* Remove the set bits in.  */
  for (i = 0; i < TD_EVENTSIZE; ++i)
    old_event.event_bits[i] &= ~event->event_bits[i];

  /* Write the new value into the thread data structure.  */
  if (ps_pdwrite (ta->ph, ta->pthread_threads_eventsp,
		  &old_event, sizeof (td_thr_events_t)) != PS_OK)
    return TD_ERR;	/* XXX Other error value?  */

  return TD_OK;
}