1 /* $NetBSD: rf_threadstuff.h,v 1.24 2007/12/05 08:39:53 ad 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 #define decl_simple_lock_data(a,b) a struct simplelock b; 57 58 typedef struct lwp *RF_Thread_t; 59 typedef void *RF_ThreadArg_t; 60 61 #define RF_DECLARE_MUTEX(_m_) decl_simple_lock_data(,(_m_)) 62 #define RF_DECLARE_STATIC_MUTEX(_m_) decl_simple_lock_data(static,(_m_)) 63 #define RF_DECLARE_EXTERN_MUTEX(_m_) decl_simple_lock_data(extern,(_m_)) 64 65 #define RF_DECLARE_COND(_c_) int _c_; 66 67 #define RF_LOCK_MUTEX(_m_) simple_lock(&(_m_)) 68 #define RF_UNLOCK_MUTEX(_m_) simple_unlock(&(_m_)) 69 70 71 /* non-spinlock */ 72 #define decl_lock_data(a,b) a kmutex_t b; 73 74 #define RF_DECLARE_LKMGR_MUTEX(_m_) decl_lock_data(,(_m_)) 75 #define RF_DECLARE_LKMGR_STATIC_MUTEX(_m_) decl_lock_data(static,(_m_)) 76 #define RF_DECLARE_LKMGR_EXTERN_MUTEX(_m_) decl_lock_data(extern,(_m_)) 77 78 #define RF_LOCK_LKMGR_MUTEX(_m_) mutex_enter(&(_m_)) 79 #define RF_UNLOCK_LKMGR_MUTEX(_m_) mutex_exit(&(_m_)) 80 81 82 /* 83 * In NetBSD, kernel threads are simply processes which share several 84 * substructures and never run in userspace. 85 */ 86 #define RF_WAIT_COND(_c_,_m_) \ 87 ltsleep(&(_c_), PRIBIO, "rfwcond", 0, &(_m_)) 88 #define RF_SIGNAL_COND(_c_) wakeup_one(&(_c_)) 89 #define RF_BROADCAST_COND(_c_) wakeup(&(_c_)) 90 #define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \ 91 kthread_create(PRI_NONE, 0, NULL, (void (*)(void *))(_func_), \ 92 (void *)(_arg_), &(_handle_), _name_) 93 94 #define RF_CREATE_ENGINE_THREAD(_handle_, _func_, _arg_, _fmt_, _fmt_arg_) \ 95 kthread_create(PRI_NONE, 0, NULL, (void (*)(void *))(_func_), \ 96 (void *)(_arg_), &(_handle_), _fmt_, _fmt_arg_) 97 98 #define rf_mutex_init(m) simple_lock_init(m) 99 100 #endif /* !_RF__RF_THREADSTUFF_H_ */ 101