HAMMER 60I/Many: Mirroring
[dragonfly.git] / sys / sys / socketvar2.h
blob51c5d1ac770fcef6f34ffdc7944504440657de12
1 /*-
2 * Copyright (c) 1982, 1986, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#)socketvar.h 8.3 (Berkeley) 2/19/95
34 * $FreeBSD: src/sys/sys/socketvar.h,v 1.46.2.10 2003/08/24 08:24:39 hsu Exp $
35 * $DragonFly: src/sys/sys/socketvar2.h,v 1.1 2007/11/07 18:24:04 dillon Exp $
38 #ifndef _SYS_SOCKETVAR2_H_
39 #define _SYS_SOCKETVAR2_H_
41 #ifndef _SYS_SOCKETVAR_H_
42 #include <sys/socketvar.h>
43 #endif
44 #ifndef _SYS_SYSTM_H_
45 #include <sys/systm.h>
46 #endif
47 #ifndef _SYS_MALLOC_H_
48 #include <sys/malloc.h>
49 #endif
52 * Acquire a lock on a signalsockbuf, sleep if the lock is already held.
53 * The sleep is interruptable unless SSB_NOINTR is set in the ssb.
55 * Returns 0 on success, non-zero if the lock could not be acquired.
57 static __inline int
58 ssb_lock(struct signalsockbuf *ssb, int wf)
60 if (ssb->ssb_flags & SSB_LOCK) {
61 if (wf == M_WAITOK)
62 return _ssb_lock(ssb);
63 return EWOULDBLOCK;
64 } else {
65 ssb->ssb_flags |= SSB_LOCK;
66 return 0;
71 * Release a previously acquired lock on a signalsockbuf.
73 static __inline void
74 ssb_unlock(struct signalsockbuf *ssb)
76 ssb->ssb_flags &= ~SSB_LOCK;
77 if (ssb->ssb_flags & SSB_WANT) {
78 ssb->ssb_flags &= ~SSB_WANT;
79 wakeup(&ssb->ssb_flags);
83 #endif