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/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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 <errno.h>
#include <time.h>

extern int __y2038_linux_support;

/* Pause execution for a number of nanoseconds.  */
int
__nanosleep_t64 (const struct __timespec64 *requested_time,
	         struct __timespec64 *remaining)
{
  struct timespec treq32, *treqp32 = NULL;
  struct timespec trem32, *tremp32 = NULL;

  if (__y2038_linux_support)
  {
    /* TODO: use 64-bit time syscalls */
  }

  if (requested_time)
  {
    if (requested_time->tv_sec > INT_MAX)
    {
      __set_errno(EOVERFLOW);
      return -1;
    }
    treq32.tv_sec = requested_time->tv_sec;
    treq32.tv_nsec = requested_time->tv_nsec;
    treqp32 = & treq32;
  }

  if (remaining)
    tremp32 = &trem32;

  int result = nanosleep(treqp32, tremp32);

  if (result == 1 && errno == EINTR && remaining)
  {
    remaining->tv_sec = trem32.tv_sec;
    remaining->tv_nsec = trem32.tv_nsec;
    remaining->tv_pad = 0;
  }

  return result;
}