ppoll.c 1.6 KB

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  1. /* Copyright (C) 2006 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <sys/syscall.h>
  17. #include <sys/poll.h>
  18. #if defined __NR_ppoll && defined __UCLIBC_LINUX_SPECIFIC__
  19. /* libc_hidden_proto(ppoll) */
  20. # define __NR___libc_ppoll __NR_ppoll
  21. static __always_inline
  22. _syscall4(int, __libc_ppoll, struct pollfd *, fds,
  23. nfds_t, nfds, const struct timespec *, timeout,
  24. const __sigset_t *, sigmask)
  25. int
  26. ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
  27. const __sigset_t *sigmask)
  28. {
  29. /* The Linux kernel can in some situations update the timeout value.
  30. We do not want that so use a local variable. */
  31. struct timespec tval;
  32. if (timeout != NULL)
  33. {
  34. tval = *timeout;
  35. timeout = &tval;
  36. }
  37. return __libc_ppoll(fds, nfds, timeout, sigmask);
  38. }
  39. libc_hidden_def(ppoll)
  40. #endif