debuggers.hg

view tools/blktap2/drivers/scheduler.h @ 22848:6341fe0f4e5a

Added tag 4.1.0-rc2 for changeset 9dca60d88c63
author Keir Fraser <keir@xen.org>
date Tue Jan 25 14:06:55 2011 +0000 (2011-01-25)
parents 1c627434605e
children
line source
1 /*
2 * Copyright (c) 2008, XenSource Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of XenSource Inc. nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
20 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 #ifndef _SCHEDULER_H_
29 #define _SCHEDULER_H_
31 #include <sys/select.h>
33 #include "list.h"
35 #define SCHEDULER_POLL_READ_FD 0x1
36 #define SCHEDULER_POLL_WRITE_FD 0x2
37 #define SCHEDULER_POLL_EXCEPT_FD 0x4
38 #define SCHEDULER_POLL_TIMEOUT 0x8
40 typedef int event_id_t;
41 typedef void (*event_cb_t) (event_id_t id, char mode, void *private);
43 typedef struct scheduler {
44 fd_set read_fds;
45 fd_set write_fds;
46 fd_set except_fds;
48 struct list_head events;
50 int uuid;
51 int max_fd;
52 int timeout;
53 int restart;
54 int max_timeout;
55 } scheduler_t;
57 void scheduler_initialize(scheduler_t *);
58 event_id_t scheduler_register_event(scheduler_t *, char mode,
59 int fd, int timeout,
60 event_cb_t cb, void *private);
61 void scheduler_unregister_event(scheduler_t *, event_id_t);
62 void scheduler_set_max_timeout(scheduler_t *, int);
63 int scheduler_wait_for_events(scheduler_t *);
65 #endif