1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #ifndef _SYS_TURNSTILE_H 28*7c478bd9Sstevel@tonic-gate #define _SYS_TURNSTILE_H 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 31*7c478bd9Sstevel@tonic-gate #include <sys/time.h> 32*7c478bd9Sstevel@tonic-gate #include <sys/param.h> 33*7c478bd9Sstevel@tonic-gate #include <sys/sleepq.h> 34*7c478bd9Sstevel@tonic-gate #include <sys/mutex.h> 35*7c478bd9Sstevel@tonic-gate #include <sys/lwp_timer_impl.h> 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 38*7c478bd9Sstevel@tonic-gate extern "C" { 39*7c478bd9Sstevel@tonic-gate #endif 40*7c478bd9Sstevel@tonic-gate 41*7c478bd9Sstevel@tonic-gate #define TS_WRITER_Q 0 /* writer sleepq (exclusive access to sobj) */ 42*7c478bd9Sstevel@tonic-gate #define TS_READER_Q 1 /* reader sleepq (shared access to sobj) */ 43*7c478bd9Sstevel@tonic-gate #define TS_NUM_Q 2 /* number of sleep queues per turnstile */ 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate typedef struct turnstile turnstile_t; 46*7c478bd9Sstevel@tonic-gate struct _sobj_ops; 47*7c478bd9Sstevel@tonic-gate 48*7c478bd9Sstevel@tonic-gate struct turnstile { 49*7c478bd9Sstevel@tonic-gate turnstile_t *ts_next; /* next on hash chain */ 50*7c478bd9Sstevel@tonic-gate turnstile_t *ts_free; /* next on freelist */ 51*7c478bd9Sstevel@tonic-gate void *ts_sobj; /* s-object threads are blocking on */ 52*7c478bd9Sstevel@tonic-gate int ts_waiters; /* number of blocked threads */ 53*7c478bd9Sstevel@tonic-gate pri_t ts_epri; /* max priority of blocked threads */ 54*7c478bd9Sstevel@tonic-gate struct _kthread *ts_inheritor; /* thread inheriting priority */ 55*7c478bd9Sstevel@tonic-gate turnstile_t *ts_prioinv; /* next in inheritor's t_prioinv list */ 56*7c478bd9Sstevel@tonic-gate sleepq_t ts_sleepq[TS_NUM_Q]; /* read/write sleep queues */ 57*7c478bd9Sstevel@tonic-gate }; 58*7c478bd9Sstevel@tonic-gate 59*7c478bd9Sstevel@tonic-gate #ifdef _KERNEL 60*7c478bd9Sstevel@tonic-gate 61*7c478bd9Sstevel@tonic-gate extern turnstile_t *turnstile_lookup(void *); 62*7c478bd9Sstevel@tonic-gate extern void turnstile_exit(void *); 63*7c478bd9Sstevel@tonic-gate extern int turnstile_block(turnstile_t *, int, void *, struct _sobj_ops *, 64*7c478bd9Sstevel@tonic-gate kmutex_t *, lwp_timer_t *); 65*7c478bd9Sstevel@tonic-gate extern void turnstile_wakeup(turnstile_t *, int, int, struct _kthread *); 66*7c478bd9Sstevel@tonic-gate extern void turnstile_change_pri(struct _kthread *, pri_t, pri_t *); 67*7c478bd9Sstevel@tonic-gate extern void turnstile_unsleep(struct _kthread *); 68*7c478bd9Sstevel@tonic-gate extern void turnstile_stay_asleep(struct _kthread *); 69*7c478bd9Sstevel@tonic-gate extern void turnstile_pi_recalc(void); 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate #endif /* _KERNEL */ 72*7c478bd9Sstevel@tonic-gate 73*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 74*7c478bd9Sstevel@tonic-gate } 75*7c478bd9Sstevel@tonic-gate #endif 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate #endif /* _SYS_TURNSTILE_H */ 78