rtkaio/sysdeps/unix/sysv/linux/kaio_error.c

   1 /* Return error status of asynchronous I/O request.
   2    Copyright (C) 1997, 2002, 2003 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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 /* We use an UGLY hack to prevent gcc from finding us cheating.  The
  22    implementation of aio_error and aio_error64 are identical and so
  23    we want to avoid code duplication by using aliases.  But gcc sees
  24    the different parameter lists and prints a warning.  We define here
  25    a function so that aio_error64 has no prototype.  */
  26 #define aio_error64 XXX
  27 #include <aio.h>
  28 /* And undo the hack.  */
  29 #undef aio_error64
  30
  31 #include <kaio_misc.h>
  32
  33 #ifndef USE_KAIO
  34 #include <aio_error.c>
  35 #else
  36
  37 #include <errno.h>
  38
  39 int
  40 aio_error (aiocbp)
  41      const struct aiocb *aiocbp;
  42 {
  43   int ret = aiocbp->__error_code;
  44
  45   if (ret == EINPROGRESS)
  46     {
  47       __aio_read_one_event ();
  48       ret = aiocbp->__error_code;
  49     }
  50   return ret;
  51 }
  52
  53 weak_alias (aio_error, aio_error64)
  54 #endif