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rf_threadstuff.h revision 1.22 
      1 /*	$NetBSD: rf_threadstuff.h,v 1.22 2007/07/09 21:01:20 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 (at) 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/lock.h>
     52 
     53 #include <dev/raidframe/raidframevar.h>
     54 
     55 #define decl_simple_lock_data(a,b) a struct simplelock b;
     56 
     57 typedef struct proc *RF_Thread_t;
     58 typedef void *RF_ThreadArg_t;
     59 
     60 #define RF_DECLARE_MUTEX(_m_)           decl_simple_lock_data(,(_m_))
     61 #define RF_DECLARE_STATIC_MUTEX(_m_)    decl_simple_lock_data(static,(_m_))
     62 #define RF_DECLARE_EXTERN_MUTEX(_m_)    decl_simple_lock_data(extern,(_m_))
     63 
     64 #define RF_DECLARE_COND(_c_)            int _c_;
     65 
     66 #define RF_LOCK_MUTEX(_m_)              simple_lock(&(_m_))
     67 #define RF_UNLOCK_MUTEX(_m_)            simple_unlock(&(_m_))
     68 
     69 
     70 /* non-spinlock */
     71 #define decl_lock_data(a,b) a struct lock b;
     72 
     73 #define RF_DECLARE_LKMGR_MUTEX(_m_)           decl_lock_data(,(_m_))
     74 #define RF_DECLARE_LKMGR_STATIC_MUTEX(_m_)    decl_lock_data(static,(_m_))
     75 #define RF_DECLARE_LKMGR_EXTERN_MUTEX(_m_)    decl_lock_data(extern,(_m_))
     76 
     77 #define RF_LOCK_LKMGR_MUTEX(_m_)        lockmgr(&(_m_),LK_EXCLUSIVE,NULL)
     78 #define RF_UNLOCK_LKMGR_MUTEX(_m_)      lockmgr(&(_m_),LK_RELEASE,NULL)
     79 
     80 
     81 /*
     82  * In NetBSD, kernel threads are simply processes which share several
     83  * substructures and never run in userspace.
     84  */
     85 #define RF_WAIT_COND(_c_,_m_)		\
     86 	ltsleep(&(_c_), PRIBIO, "rfwcond", 0, &(_m_))
     87 #define RF_SIGNAL_COND(_c_)            wakeup_one(&(_c_))
     88 #define RF_BROADCAST_COND(_c_)         wakeup(&(_c_))
     89 #define	RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \
     90 	kthread_create(PRI_NONE, 0, NULL, (void (*)(void *))(_func_), \
     91 	    (void *)(_arg_), (struct lwp **)&(_handle_), _name_)
     92 
     93 #define	RF_CREATE_ENGINE_THREAD(_handle_, _func_, _arg_, _fmt_, _fmt_arg_) \
     94 	kthread_create(PRI_NONE, 0, NULL, (void (*)(void *))(_func_), \
     95 	    (void *)(_arg_), (struct lwp **)&(_handle_), _fmt_, _fmt_arg_)
     96 
     97 #define rf_mutex_init(m) simple_lock_init(m)
     98 
     99 #endif				/* !_RF__RF_THREADSTUFF_H_ */
    100