1  /* C11 threads thread sleep implementation - Linux variant.
       2     Copyright (C) 2020-2023 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_sleep64 (const struct __timespec64 *time_point,
      26                  struct __timespec64 *remaining)
      27  {
      28    int ret = __clock_nanosleep_time64 (CLOCK_REALTIME, 0, time_point,
      29                                        remaining);
      30    /* C11 states thrd_sleep function returns -1 if it has been interrupted
      31       by a signal, or a negative value if it fails.  */
      32    switch (ret)
      33    {
      34       case 0:      return 0;
      35       case EINTR:  return -1;
      36       default:     return -2;
      37    }
      38  }
      39  
      40  #if __TIMESIZE != 64
      41  libc_hidden_def (__thrd_sleep64)
      42  
      43  int
      44  __thrd_sleep (const struct timespec *time_point, struct timespec *remaining)
      45  {
      46    const struct __timespec64 treq64 = valid_timespec_to_timespec64 (*time_point);
      47    struct __timespec64 trem64;
      48  
      49    int ret = __thrd_sleep64 (&treq64, remaining != NULL ? &trem64 : NULL);
      50    if (ret == -1 && remaining != NULL)
      51      *remaining = valid_timespec64_to_timespec (trem64);
      52  
      53    return ret;
      54  }
      55  #endif
      56  weak_alias (__thrd_sleep, thrd_sleep)