xref: /netbsd-src/sys/rump/librump/rumpkern/rump_curlwp___thread.h (revision 87fd18f8e547eaf74cc8b13c2004dc30f5ff1662)
1 /*	$NetBSD: rump_curlwp___thread.h,v 1.3 2018/04/19 21:50:10 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 2014 Antti Kantee.  All Rights Reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following 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
16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 extern __thread struct lwp *curlwp_storage;
29 #ifdef RUMP__CURLWP_PRIVATE
30 #include <rump/rumpuser.h>
31 
32 __thread struct lwp *curlwp_storage;
33 static void
lwproc_curlwpop(enum rumplwpop op,struct lwp * l)34 lwproc_curlwpop(enum rumplwpop op, struct lwp *l)
35 {
36 
37 	switch (op) {
38 	case RUMPUSER_LWP_CREATE:
39 	case RUMPUSER_LWP_DESTROY:
40 		break;
41 	case RUMPUSER_LWP_SET:
42 		KASSERT(curlwp_storage == NULL);
43 		curlwp_storage = l;
44 		break;
45 	case RUMPUSER_LWP_CLEAR:
46 		KASSERT(curlwp_storage == l);
47 		curlwp_storage = NULL;
48 		break;
49 	}
50 	/*
51 	 * Need to keep hypercall layer in sync, since it can use curlwp
52 	 * for things like mutexes.  Should be fixed/adjusted somehow.
53 	 */
54 	rumpuser_curlwpop(op, l);
55 }
56 #endif
57 
58 static __inline struct lwp * __attribute__((const))
rump_curlwp_fast(void)59 rump_curlwp_fast(void)
60 {
61 
62 	return curlwp_storage;
63 }
64