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61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* Synchronize I/O in given file descriptor.
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Copyright (C) 1997, 1999, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* We use an UGLY hack to prevent gcc from finding us cheating. The
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implementation of aio_fsync and aio_fsync64 are identical and so
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we want to avoid code duplication by using aliases. But gcc sees
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the different parameter lists and prints a warning. We define here
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a function so that aio_fsync64 has no prototype. */
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#define aio_fsync64 XXX
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#include <aio.h>
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/* And undo the hack. */
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#undef aio_fsync64
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#include <errno.h>
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#include "aio_misc.h"
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int
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aio_fsync (int op, struct aiocb *aiocbp)
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{
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int flags;
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if (op != O_DSYNC && __builtin_expect (op != O_SYNC, 0))
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{
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__set_errno (EINVAL);
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return -1;
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}
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flags = fcntl (aiocbp->aio_fildes, F_GETFL);
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if (__builtin_expect (flags == -1, 0)
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|| __builtin_expect ((flags & (O_RDWR | O_WRONLY)) == 0, 0))
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{
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__set_errno (EBADF);
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return -1;
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}
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return (__aio_enqueue_request ((aiocb_union *) aiocbp,
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op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL
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? -1 : 0);
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}
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weak_alias (aio_fsync, aio_fsync64)
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