rwlock.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1991-1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_RWLOCK_H
#define _SYS_RWLOCK_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _ASM
typedef enum {
} krw_type_t;
typedef enum {
} krw_t;
typedef struct _krwlock {
void *_opaque[1];
} krwlock_t;
#if defined(_KERNEL)
#define RW_READ_HELD(x) (rw_read_held((x)))
#define RW_WRITE_HELD(x) (rw_write_held((x)))
#define RW_LOCK_HELD(x) (rw_lock_held((x)))
#define RW_ISWRITER(x) (rw_iswriter(x))
extern void rw_destroy(krwlock_t *);
extern void rw_downgrade(krwlock_t *);
extern int rw_tryupgrade(krwlock_t *);
extern int rw_read_held(krwlock_t *);
extern int rw_write_held(krwlock_t *);
extern int rw_lock_held(krwlock_t *);
extern int rw_read_locked(krwlock_t *);
extern int rw_iswriter(krwlock_t *);
#endif /* defined(_KERNEL) */
#endif /* _ASM */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_RWLOCK_H */