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      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 2005 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef _SYS_TXG_IMPL_H
     28 #define	_SYS_TXG_IMPL_H
     29 
     30 #pragma ident	"@(#)txg_impl.h	1.1	05/10/30 SMI"
     31 
     32 #include <sys/spa.h>
     33 #include <sys/txg.h>
     34 
     35 #ifdef	__cplusplus
     36 extern "C" {
     37 #endif
     38 
     39 struct tx_cpu {
     40 	kmutex_t	tc_lock;
     41 	kcondvar_t	tc_cv[TXG_SIZE];
     42 	uint64_t	tc_count[TXG_SIZE];
     43 	char		tc_pad[16];
     44 };
     45 
     46 typedef struct tx_state {
     47 	tx_cpu_t	*tx_cpu;	/* protects right to enter txg	*/
     48 	kmutex_t	tx_sync_lock;	/* protects tx_state_t */
     49 	krwlock_t	tx_suspend;
     50 	uint64_t	tx_open_txg;	/* currently open txg id */
     51 	uint64_t	tx_quiesced_txg; /* quiesced txg waiting for sync */
     52 	uint64_t	tx_syncing_txg;	/* currently syncing txg id */
     53 	uint64_t	tx_synced_txg;	/* last synced txg id */
     54 
     55 	uint64_t	tx_sync_txg_waiting; /* txg we're waiting to sync */
     56 	uint64_t	tx_quiesce_txg_waiting; /* txg we're waiting to open */
     57 
     58 	kcondvar_t	tx_sync_more_cv;
     59 	kcondvar_t	tx_sync_done_cv;
     60 	kcondvar_t	tx_quiesce_more_cv;
     61 	kcondvar_t	tx_quiesce_done_cv;
     62 	kcondvar_t	tx_timeout_exit_cv;
     63 	kcondvar_t	tx_exit_cv;	/* wait for all threads to exit */
     64 
     65 	uint8_t		tx_threads;	/* number of threads */
     66 	uint8_t		tx_exiting;	/* set when we're exiting */
     67 
     68 	kthread_t	*tx_sync_thread;
     69 	kthread_t	*tx_quiesce_thread;
     70 	kthread_t	*tx_timelimit_thread;
     71 } tx_state_t;
     72 
     73 #ifdef	__cplusplus
     74 }
     75 #endif
     76 
     77 #endif	/* _SYS_TXG_IMPL_H */
     78