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62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_RPRWLOCK_H
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#define _SYS_RPRWLOCK_H
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#include <sys/inttypes.h>
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#include <sys/list.h>
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#include <sys/zfs_context.h>
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#include <sys/refcount.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct rprwlock {
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kmutex_t rw_lock;
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kthread_t *rw_writer;
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kcondvar_t rw_cv;
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refcount_t rw_count;
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} rprwlock_t;
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void rprw_init(rprwlock_t *rwl);
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void rprw_destroy(rprwlock_t *rwl);
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void rprw_enter_read(rprwlock_t *rwl, void *tag);
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void rprw_enter_write(rprwlock_t *rwl, void *tag);
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void rprw_enter(rprwlock_t *rwl, krw_t rw, void *tag);
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void rprw_exit(rprwlock_t *rwl, void *tag);
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boolean_t rprw_held(rprwlock_t *rwl, krw_t rw);
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#define RPRW_READ_HELD(x) rprw_held(x, RW_READER)
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#define RPRW_WRITE_HELD(x) rprw_held(x, RW_WRITER)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_RPRWLOCK_H */
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