Home | History | Annotate | Download | only in sys
      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 (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef _SYS_SLEEPQ_H
     27 #define	_SYS_SLEEPQ_H
     28 
     29 #include <sys/machlock.h>
     30 
     31 #ifdef	__cplusplus
     32 extern "C" {
     33 #endif
     34 
     35 /*
     36  * Common definition for a sleep queue,
     37  * be it an old-style sleep queue, or
     38  * a constituent of a turnstile.
     39  */
     40 
     41 typedef struct sleepq {
     42 	struct _kthread *sq_first;
     43 } sleepq_t;
     44 
     45 /*
     46  * Definition of the head of a sleep queue hash bucket.
     47  */
     48 typedef struct _sleepq_head {
     49 	sleepq_t	sq_queue;
     50 	disp_lock_t	sq_lock;
     51 } sleepq_head_t;
     52 
     53 #ifdef	_KERNEL
     54 
     55 #define	NSLEEPQ		2048
     56 #define	SQHASHINDEX(X)	\
     57 	((((uintptr_t)(X) >> 2) ^ ((uintptr_t)(X) >> 13) ^	\
     58 	((uintptr_t)(X) >> 24)) & (NSLEEPQ - 1))
     59 #define	SQHASH(X)	(&sleepq_head[SQHASHINDEX(X)])
     60 
     61 extern sleepq_head_t	sleepq_head[NSLEEPQ];
     62 
     63 extern void		sleepq_insert(sleepq_t *, struct _kthread *);
     64 extern struct _kthread	*sleepq_wakeone_chan(sleepq_t *, void *);
     65 extern void		sleepq_wakeall_chan(sleepq_t *, void *);
     66 extern void		sleepq_unsleep(struct _kthread *);
     67 extern void		sleepq_dequeue(struct _kthread *);
     68 extern void		sleepq_unlink(struct _kthread **, struct _kthread *);
     69 
     70 #endif	/* _KERNEL */
     71 
     72 #ifdef	__cplusplus
     73 }
     74 #endif
     75 
     76 #endif	/* _SYS_SLEEPQ_H */
     77