1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_TURNSTILE_H 28*0Sstevel@tonic-gate #define _SYS_TURNSTILE_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/types.h> 33*0Sstevel@tonic-gate #include <sys/time.h> 34*0Sstevel@tonic-gate #include <sys/param.h> 35*0Sstevel@tonic-gate #include <sys/sleepq.h> 36*0Sstevel@tonic-gate #include <sys/mutex.h> 37*0Sstevel@tonic-gate #include <sys/lwp_timer_impl.h> 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate #ifdef __cplusplus 40*0Sstevel@tonic-gate extern "C" { 41*0Sstevel@tonic-gate #endif 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate #define TS_WRITER_Q 0 /* writer sleepq (exclusive access to sobj) */ 44*0Sstevel@tonic-gate #define TS_READER_Q 1 /* reader sleepq (shared access to sobj) */ 45*0Sstevel@tonic-gate #define TS_NUM_Q 2 /* number of sleep queues per turnstile */ 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate typedef struct turnstile turnstile_t; 48*0Sstevel@tonic-gate struct _sobj_ops; 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate struct turnstile { 51*0Sstevel@tonic-gate turnstile_t *ts_next; /* next on hash chain */ 52*0Sstevel@tonic-gate turnstile_t *ts_free; /* next on freelist */ 53*0Sstevel@tonic-gate void *ts_sobj; /* s-object threads are blocking on */ 54*0Sstevel@tonic-gate int ts_waiters; /* number of blocked threads */ 55*0Sstevel@tonic-gate pri_t ts_epri; /* max priority of blocked threads */ 56*0Sstevel@tonic-gate struct _kthread *ts_inheritor; /* thread inheriting priority */ 57*0Sstevel@tonic-gate turnstile_t *ts_prioinv; /* next in inheritor's t_prioinv list */ 58*0Sstevel@tonic-gate sleepq_t ts_sleepq[TS_NUM_Q]; /* read/write sleep queues */ 59*0Sstevel@tonic-gate }; 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate #ifdef _KERNEL 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate extern turnstile_t *turnstile_lookup(void *); 64*0Sstevel@tonic-gate extern void turnstile_exit(void *); 65*0Sstevel@tonic-gate extern int turnstile_block(turnstile_t *, int, void *, struct _sobj_ops *, 66*0Sstevel@tonic-gate kmutex_t *, lwp_timer_t *); 67*0Sstevel@tonic-gate extern void turnstile_wakeup(turnstile_t *, int, int, struct _kthread *); 68*0Sstevel@tonic-gate extern void turnstile_change_pri(struct _kthread *, pri_t, pri_t *); 69*0Sstevel@tonic-gate extern void turnstile_unsleep(struct _kthread *); 70*0Sstevel@tonic-gate extern void turnstile_stay_asleep(struct _kthread *); 71*0Sstevel@tonic-gate extern void turnstile_pi_recalc(void); 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate #endif /* _KERNEL */ 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate #ifdef __cplusplus 76*0Sstevel@tonic-gate } 77*0Sstevel@tonic-gate #endif 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate #endif /* _SYS_TURNSTILE_H */ 80