1  /* C11 threads thread sleep implementation.
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       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  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  #include <sysdep-cancel.h>
      21  
      22  #include "thrd_priv.h"
      23  
      24  int
      25  thrd_sleep (const struct timespec* time_point, struct timespec* remaining)
      26  {
      27    int ret = __clock_nanosleep (CLOCK_REALTIME, 0, time_point, remaining);
      28    /* C11 states thrd_sleep function returns -1 if it has been interrupted
      29       by a signal, or a negative value if it fails.  */
      30    switch (ret)
      31    {
      32       case 0:      return 0;
      33       case EINTR:  return -1;
      34       default:     return -2;
      35    }
      36  }