xref: /illumos-gate/usr/src/uts/common/sys/refstr_impl.h (revision 4c87aefe8930bd07275b8dd2e96ea5f24d93a52e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 1999 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #ifndef _SYS_REFSTR_IMPL_H
28 #define	_SYS_REFSTR_IMPL_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include <sys/types.h>
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 /*
39  * Strings with reference counts.
40  * The refstr_t definition is private to the implementation.
41  * <sys/refstr.h> just declares it as a 'struct refstr'.
42  * We require there never to be an allocation larger than 4 Gbytes.
43  */
44 
45 struct refstr {
46 	uint32_t	rs_size;	/* allocation size */
47 	uint32_t	rs_refcnt;	/* reference count */
48 	char		rs_string[1];	/* constant string */
49 };
50 
51 #ifdef	__cplusplus
52 }
53 #endif
54 
55 #endif	/* _SYS_REFSTR_IMPL_H */
56