rt/aio_cancel.c

   1 /* Cancel requests associated with given file descriptor.  Stub version.
   2    Copyright (C) 2001-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19
  20 /* We use an UGLY hack to prevent gcc from finding us cheating.  The
  21    implementation of aio_cancel and aio_cancel64 are identical and so
  22    we want to avoid code duplication by using aliases.  But gcc sees
  23    the different parameter lists and prints a warning.  We define here
  24    a function so that aio_cancel64 has no prototype.  */
  25 #define aio_cancel64 XXX
  26 #include <aio.h>
  27 /* And undo the hack.  */
  28 #undef aio_cancel64
  29
  30 #include <errno.h>
  31
  32 int
  33 aio_cancel (int fildes, struct aiocb *aiocbp)
  34 {
  35   __set_errno (ENOSYS);
  36   return -1;
  37 }
  38
  39 weak_alias (aio_cancel, aio_cancel64)
  40
  41 stub_warning (aio_cancel)
  42 stub_warning (aio_cancel64)