rt/aio_fsync.c

   1 /* Synchronize I/O in given file descriptor.
   2    Copyright (C) 1997, 1999 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* We use an UGLY hack to prevent gcc from finding us cheating.  The
  23    implementation of aio_fsync and aio_fsync64 are identical and so
  24    we want to avoid code duplication by using aliases.  But gcc sees
  25    the different parameter lists and prints a warning.  We define here
  26    a function so that aio_fsync64 has no prototype.  */
  27 #define aio_fsync64 XXX
  28 #include <aio.h>
  29 /* And undo the hack.  */
  30 #undef aio_fsync64
  31 #include <errno.h>
  32
  33 #include "aio_misc.h"
  34
  35
  36 int
  37 aio_fsync (int op, struct aiocb *aiocbp)
  38 {
  39   if (op != O_DSYNC && op != O_SYNC)
  40     {
  41       __set_errno (EINVAL);
  42       return -1;
  43     }
  44
  45   return (__aio_enqueue_request ((aiocb_union *) aiocbp,
  46                                  op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL
  47           ? -1 : 0);
  48 }
  49
  50 weak_alias (aio_fsync, aio_fsync64)