td_thr_clear_event.c 1.9 KB

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  1. /* Disable specific event for thread.
  2. Copyright (C) 1999, 2001, 2002, 2005 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, see
  15. <http://www.gnu.org/licenses/>. */
  16. #include <stddef.h>
  17. #include "thread_dbP.h"
  18. td_err_e
  19. td_thr_clear_event(const td_thrhandle_t *th,td_thr_events_t *event)
  20. {
  21. td_thr_events_t old_event;
  22. int i;
  23. LOG ("td_thr_clear_event");
  24. /* If the thread descriptor has not yet been constructed do not do
  25. anything. */
  26. if (th->th_unique == NULL)
  27. return TD_OK;
  28. /* Write the new value into the thread data structure. */
  29. if (ps_pdread (th->th_ta_p->ph,
  30. ((char *) th->th_unique
  31. + offsetof (struct _pthread_descr_struct,
  32. p_eventbuf.eventmask)),
  33. &old_event, sizeof (td_thr_events_t)) != PS_OK)
  34. return TD_ERR; /* XXX Other error value? */
  35. /* Remove the set bits in. */
  36. for (i = 0; i < TD_EVENTSIZE; ++i)
  37. old_event.event_bits[i] &= ~event->event_bits[i];
  38. /* Write the new value into the thread data structure. */
  39. if (ps_pdwrite (th->th_ta_p->ph,
  40. ((char *) th->th_unique
  41. + offsetof (struct _pthread_descr_struct,
  42. p_eventbuf.eventmask)),
  43. &old_event, sizeof (td_thr_events_t)) != PS_OK)
  44. return TD_ERR; /* XXX Other error value? */
  45. return TD_OK;
  46. }