time/clock_nanosleep.c

   1 /* High-resolution sleep with the specified clock.  Stub version.
   2    Copyright (C) 2000-2019 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 <errno.h>
  20 #include <time.h>
  21 #include <shlib-compat.h>
  22
  23 int
  24 __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
  25                    struct timespec *rem)
  26 {
  27   if (__builtin_expect (req->tv_nsec, 0) < 0
  28       || __builtin_expect (req->tv_nsec, 0) >= 1000000000)
  29     return EINVAL;
  30
  31   if (flags != TIMER_ABSTIME && flags != 0)
  32     return EINVAL;
  33
  34   /* Not implemented.  */
  35   return ENOSYS;
  36 }
  37
  38 versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17);
  39 /* clock_nanosleep moved to libc in version 2.17;
  40    old binaries may expect the symbol version it had in librt.  */
  41 #if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
  42 strong_alias (__clock_nanosleep, __clock_nanosleep_2);
  43 compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2);
  44 #endif
  45
  46 stub_warning (clock_nanosleep)