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-rw-r--r--rt/lio_listio.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/rt/lio_listio.c b/rt/lio_listio.c
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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;
+}