usr/src/uts/common/sys/refstr_impl.h

   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 */