sysdeps/unix/sysv/linux/nanosleep.c

   1 /* High-resolution sleep.
   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 <errno.h>
  21
  22 int
  23 __nanosleep64 (const struct __timespec64 *req, struct __timespec64 *rem)
  24 {
  25   int ret = __clock_nanosleep_time64 (CLOCK_REALTIME, 0, req, rem);
  26   if (ret != 0)
  27     {
  28       __set_errno (ret);
  29       return -1;
  30     }
  31   return 0;
  32 }
  33 #if __TIMESIZE != 64
  34 libc_hidden_def (__nanosleep64)
  35
  36 int
  37 __nanosleep (const struct timespec *req, struct timespec *rem)
  38 {
  39   struct __timespec64 treq64, trem64;
  40
  41   treq64 = valid_timespec_to_timespec64 (*req);
  42   int ret = __nanosleep64 (&treq64, rem != NULL ? &trem64 : NULL);
  43
  44   if (ret != 0 && errno == EINTR && rem != NULL)
  45     *rem = valid_timespec64_to_timespec (trem64);
  46   return ret;
  47 }
  48 #endif
  49 libc_hidden_def (__nanosleep)
  50 weak_alias (__nanosleep, nanosleep)