glibc/sysdeps/pthread/thrd_sleep.c

/* C11 threads thread sleep implementation.
   Copyright (C) 2018-2020 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
   <https://www.gnu.org/licenses/>.  */

#include <time.h>
#include <sysdep-cancel.h>

#include "thrd_priv.h"

int
thrd_sleep (const struct timespec* time_point, struct timespec* remaining)
{
  int ret = __clock_nanosleep (CLOCK_REALTIME, 0, time_point, remaining);
  /* C11 states thrd_sleep function returns -1 if it has been interrupted
     by a signal, or a negative value if it fails.  */
  switch (ret)
  {
     case 0:      return 0;
     case EINTR:  return -1;
     default:     return -2;
  }
}