ppoll.c 1.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354
  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, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <sys/syscall.h>
  16. #if (defined __NR_ppoll || defined(__NR_ppoll_time64)) && defined __UCLIBC_LINUX_SPECIFIC__ && defined __USE_GNU
  17. #define __need_NULL
  18. #include <stddef.h>
  19. #include <signal.h>
  20. #include <sys/poll.h>
  21. #include <cancel.h>
  22. #if defined(__UCLIBC_USE_TIME64__)
  23. #include "internal/time64_helpers.h"
  24. #endif
  25. static int
  26. __NC(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. tval = *timeout;
  34. timeout = &tval;
  35. }
  36. #if defined(__UCLIBC_USE_TIME64__) && defined(__NR_ppoll_time64)
  37. return INLINE_SYSCALL(ppoll_time64, 5, fds, nfds, TO_TS64_P(timeout), sigmask, __SYSCALL_SIGSET_T_SIZE);
  38. #else
  39. return INLINE_SYSCALL(ppoll, 5, fds, nfds, timeout, sigmask, __SYSCALL_SIGSET_T_SIZE);
  40. #endif
  41. }
  42. CANCELLABLE_SYSCALL(int, ppoll, (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
  43. const sigset_t *sigmask),
  44. (fds, nfds, timeout, sigmask))
  45. #endif