ptclock_settime.c 1.8 KB

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  1. /* Copyright (C) 2001, 2004 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public License as
  5. published by the Free Software Foundation; either version 2.1 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If not,
  13. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14. Boston, MA 02111-1307, USA. */
  15. #include <errno.h>
  16. #include <time.h>
  17. #include <libc-internal.h>
  18. #include "internals.h"
  19. #include "spinlock.h"
  20. #if HP_TIMING_AVAIL
  21. int
  22. __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
  23. {
  24. pthread_descr self = thread_self ();
  25. pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
  26. const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE;
  27. if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread)
  28. /* Our own clock. */
  29. THREAD_SETMEM (self, p_cpuclock_offset, offset);
  30. else
  31. {
  32. pthread_descr th;
  33. pthread_handle handle = thread_handle (thread);
  34. __pthread_lock (&handle->h_lock, NULL);
  35. th = handle->h_descr;
  36. if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated)
  37. {
  38. __pthread_unlock (&handle->h_lock);
  39. __set_errno (EINVAL);
  40. return -1;
  41. }
  42. th->p_cpuclock_offset = offset;
  43. __pthread_unlock (&handle->h_lock);
  44. }
  45. return 0;
  46. }
  47. #endif