xref: /titanic_41/usr/src/uts/common/sys/refstr_impl.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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