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rf_threadstuff.h revision 1.32 
      1 /*	$NetBSD: rf_threadstuff.h,v 1.32 2011/05/11 05:14:07 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 (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/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 
     72 #define rf_mutex_init(m)               simple_lock_init(m)
     73 
     74 
     75 /* Modern mutex */
     76 /* Note that rf_declare_{mutex,cond}2() do _NOT_ append the ; */
     77 #define rf_declare_mutex2(_m_)           kmutex_t _m_
     78 #define rf_declare_cond2(_c_)            kcondvar_t _c_
     79 
     80 #define rf_lock_mutex2(_m_)              mutex_enter(&(_m_))
     81 #define rf_unlock_mutex2(_m_)            mutex_exit(&(_m_))
     82 
     83 #define rf_init_mutex2(_m_, _p_)         mutex_init(&(_m_), MUTEX_DEFAULT, (_p_))
     84 #define rf_destroy_mutex2(_m_)           mutex_destroy(&(_m_))
     85 
     86 #define rf_owned_mutex2(_m_)             mutex_owned(&(_m_))
     87 
     88 #define rf_init_cond2(_c_, _w_)          cv_init(&(_c_), (_w_))
     89 #define rf_destroy_cond2(_c_)            cv_destroy(&(_c_))
     90 
     91 #define rf_wait_cond2(_c_,_m_)           cv_wait(&(_c_), &(_m_))
     92 #define rf_timedwait_cond2(_c_,_m_,_t_)  cv_timedwait(&(_c_), &(_m_), (_t_))
     93 #define rf_signal_cond2(_c_)             cv_signal(&(_c_))
     94 #define rf_broadcast_cond2(_c_)          cv_broadcast(&(_c_))
     95 
     96 #define rf_sleep(_w_,_t_,_m_)            kpause((_w_), false, (_t_), &(_m_))
     97 
     98 /*
     99  * In NetBSD, kernel threads are simply processes which share several
    100  * substructures and never run in userspace.
    101  */
    102 
    103 #define	RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \
    104 	kthread_create(PRI_SOFTBIO, 0, NULL, (void (*)(void *))(_func_), \
    105 	    (void *)(_arg_), &(_handle_), _name_)
    106 
    107 #define	RF_CREATE_ENGINE_THREAD(_handle_, _func_, _arg_, _fmt_, _fmt_arg_) \
    108 	kthread_create(PRI_SOFTBIO, 0, NULL, (void (*)(void *))(_func_), \
    109 	    (void *)(_arg_), &(_handle_), _fmt_, _fmt_arg_)
    110 
    111 #endif				/* !_RF__RF_THREADSTUFF_H_ */
    112