1 /* $NetBSD: rf_threadstuff.h,v 1.30 2011/05/03 08:18:43 mrg Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Mark Holland, Daniel Stodolsky, Jim Zelenka 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* 30 * threadstuff.h -- definitions for threads, locks, and synchronization 31 * 32 * The purpose of this file is provide some illusion of portability. 33 * If the functions below can be implemented with the same semantics on 34 * some new system, then at least the synchronization and thread control 35 * part of the code should not require modification to port to a new machine. 36 * the only other place where the pthread package is explicitly used is 37 * threadid.h 38 * 39 * this file should be included above stdio.h to get some necessary defines. 40 * 41 */ 42 43 #ifndef _RF__RF_THREADSTUFF_H_ 44 #define _RF__RF_THREADSTUFF_H_ 45 46 #include <sys/types.h> 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/proc.h> 50 #include <sys/kthread.h> 51 #include <sys/simplelock.h> 52 #include <sys/mutex.h> 53 54 #include <dev/raidframe/raidframevar.h> 55 56 57 /* Old school simple_lock */ 58 typedef struct lwp *RF_Thread_t; 59 typedef void *RF_ThreadArg_t; 60 61 #define RF_DECLARE_MUTEX(_m_) struct simplelock _m_; 62 63 #define RF_DECLARE_COND(_c_) int _c_; 64 65 #define RF_LOCK_MUTEX(_m_) simple_lock(&(_m_)) 66 #define RF_UNLOCK_MUTEX(_m_) simple_unlock(&(_m_)) 67 68 #define RF_WAIT_COND(_c_,_m_) \ 69 ltsleep(&(_c_), PRIBIO, "rfwcond", 0, &(_m_)) 70 #define RF_SIGNAL_COND(_c_) wakeup_one(&(_c_)) 71 #define RF_BROADCAST_COND(_c_) wakeup(&(_c_)) 72 73 #define rf_mutex_init(m) simple_lock_init(m) 74 75 76 /* Modern mutex */ 77 /* Note that rf_declare_{mutex,cond}2() do _NOT_ append the ; */ 78 #define rf_declare_mutex2(_m_) kmutex_t _m_ 79 #define rf_declare_cond2(_c_) kcondvar_t _c_ 80 81 #define rf_lock_mutex2(_m_) mutex_enter(&(_m_)) 82 #define rf_unlock_mutex2(_m_) mutex_exit(&(_m_)) 83 84 #define rf_init_mutex2(_m_, _p_) mutex_init(&(_m_), MUTEX_DEFAULT, (_p_)) 85 #define rf_destroy_mutex2(_m_) mutex_destroy(&(_m_)) 86 87 #define rf_init_cond2(_c_, _w_) cv_init(&(_c_), (_w_)) 88 #define rf_destroy_cond2(_c_) cv_destroy(&(_c_)) 89 90 #define rf_wait_cond2(_c_,_m_) cv_wait(&(_c_), &(_m_)) 91 #define rf_timedwait_cond2(_c_,_m_,_t_) cv_timedwait(&(_c_), &(_m_), (_t_)) 92 #define rf_signal_cond2(_c_) cv_signal(&(_c_)) 93 #define rf_broadcast_cond2(_c_) cv_broadcast(&(_c_)) 94 95 #define rf_sleep(_w_,_t_,_m_) kpause((_w_), false, (_t_), &(_m_)) 96 97 /* 98 * In NetBSD, kernel threads are simply processes which share several 99 * substructures and never run in userspace. 100 */ 101 102 #define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \ 103 kthread_create(PRI_SOFTBIO, 0, NULL, (void (*)(void *))(_func_), \ 104 (void *)(_arg_), &(_handle_), _name_) 105 106 #define RF_CREATE_ENGINE_THREAD(_handle_, _func_, _arg_, _fmt_, _fmt_arg_) \ 107 kthread_create(PRI_SOFTBIO, 0, NULL, (void (*)(void *))(_func_), \ 108 (void *)(_arg_), &(_handle_), _fmt_, _fmt_arg_) 109 110 #endif /* !_RF__RF_THREADSTUFF_H_ */ 111