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/* Enqueue and list of read or write requests.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <aio.h>
#include <errno.h>
#include <semaphore.h>
#include "aio_misc.h"
int
lio_listio (mode, list, nent, sig)
int mode;
struct aiocb *const list[];
int nent;
struct sigevent *sig;
{
int cnt;
int total = 0;
int result = 0;
/* Check arguments. */
if (mode != LIO_WAIT && mode != LIO_NOWAIT)
{
__set_errno (EINVAL);
return -1;
}
/* Request the semaphore. */
sem_wait (&__aio_requests_sema);
/* Now we can enqueue all requests. Since we already acquired the
semaphore the enqueue function need not do this. */
for (cnt = 0; cnt < nent; ++cnt)
if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP)
if (__aio_enqueue_request ((aiocb_union *) list[cnt],
list[cnt]->aio_lio_opcode, 0) >= 0)
/* Successfully enqueued. */
++total;
else
/* Signal that we've seen an error. `errno' and the error code
of the aiocb will tell more. */
result = -1;
/* Release the semaphore. */
sem_post (&__aio_requests_sema);
return result;
}
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