ia64/xen-unstable

view tools/libaio/src/io_queue_run.c @ 10736:2937703f0ed0

Added blktap support. Includes kernel driver (enabled as CONFIG_XEN_BLKDEV_TAP=y) and userspace tools. The userspace deamon (blktapctrl) is enabled by default when xend is activated. For further information on using and configuring blktap see tools/blktap/README.
author jchesterfield@dhcp92.uk.xensource.com
date Thu Jul 13 10:13:26 2006 +0100 (2006-07-13)
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1 /* io_submit
2 libaio Linux async I/O interface
3 Copyright 2002 Red Hat, Inc.
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include <libaio.h>
20 #include <errno.h>
21 #include <stdlib.h>
22 #include <time.h>
24 int io_queue_run(io_context_t ctx)
25 {
26 static struct timespec timeout = { 0, 0 };
27 struct io_event event;
28 int ret;
30 /* FIXME: batch requests? */
31 while (1 == (ret = io_getevents(ctx, 0, 1, &event, &timeout))) {
32 io_callback_t cb = (io_callback_t)event.data;
33 struct iocb *iocb = event.obj;
35 cb(ctx, iocb, event.res, event.res2);
36 }
38 return ret;
39 }