1 /*-
2 * Copyright (c) 2015-2019 François Tigeot <ftigeot@wolfpond.org>
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
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/spinlock2.h>
28 #include <linux/async.h>
29
30 #include <sys/kernel.h>
31
32 static async_cookie_t cookie_counter = 1;
33
34 /* Protects cookie_counter */
35 static struct lock linux_async_lock;
36 LOCK_SYSINIT(linux_async_lock, &linux_async_lock, "lasync", LK_CANRECURSE);
37
38 /* async_schedule: schedule a function for asynchronous execution */
async_schedule(async_func_t func,void * data)39 async_cookie_t async_schedule(async_func_t func, void *data)
40 {
41 async_cookie_t cookie;
42
43 lockmgr(&linux_async_lock, LK_EXCLUSIVE);
44 cookie_counter++;
45 cookie = cookie_counter;
46 lockmgr(&linux_async_lock, LK_RELEASE);
47
48 /* XXX: Just run the function synchronously for now */
49 func(data, cookie);
50
51 return cookie;
52 }
53