FreeBSD/Linux Kernel Cross Reference
sys/dev/raidframe/rf_threadstuff.h

     /*      $NetBSD: rf_threadstuff.h,v 1.20 2003/12/29 06:30:42 oster Exp $        */
     /*
      * Copyright (c) 1995 Carnegie-Mellon University.
      * All rights reserved.
      *
      * Author: Mark Holland, Daniel Stodolsky, Jim Zelenka
      *
      * Permission to use, copy, modify and distribute this software and
      * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     */
    
    /*
     * threadstuff.h -- definitions for threads, locks, and synchronization
     *
     * The purpose of this file is provide some illusion of portability.
     * If the functions below can be implemented with the same semantics on
     * some new system, then at least the synchronization and thread control
     * part of the code should not require modification to port to a new machine.
     * the only other place where the pthread package is explicitly used is
     * threadid.h
     *
     * this file should be included above stdio.h to get some necessary defines.
     *
     */
    
    #ifndef _RF__RF_THREADSTUFF_H_
    #define _RF__RF_THREADSTUFF_H_
    
    #include <sys/types.h>
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/kthread.h>
    #include <sys/lock.h>
    
    #include <dev/raidframe/raidframevar.h>
    
    #define decl_simple_lock_data(a,b) a struct simplelock b;
    
    typedef struct proc *RF_Thread_t;
    typedef void *RF_ThreadArg_t;
    
    #define RF_DECLARE_MUTEX(_m_)           decl_simple_lock_data(,(_m_))
    #define RF_DECLARE_STATIC_MUTEX(_m_)    decl_simple_lock_data(static,(_m_))
    #define RF_DECLARE_EXTERN_MUTEX(_m_)    decl_simple_lock_data(extern,(_m_))
    
    #define RF_DECLARE_COND(_c_)            int _c_;
    
    #define RF_LOCK_MUTEX(_m_)              simple_lock(&(_m_))
    #define RF_UNLOCK_MUTEX(_m_)            simple_unlock(&(_m_))
    
    
    /* non-spinlock */
    #define decl_lock_data(a,b) a struct lock b;
    
    #define RF_DECLARE_LKMGR_MUTEX(_m_)           decl_lock_data(,(_m_))
    #define RF_DECLARE_LKMGR_STATIC_MUTEX(_m_)    decl_lock_data(static,(_m_))
    #define RF_DECLARE_LKMGR_EXTERN_MUTEX(_m_)    decl_lock_data(extern,(_m_))
    
    #define RF_LOCK_LKMGR_MUTEX(_m_)        lockmgr(&(_m_),LK_EXCLUSIVE,NULL)
    #define RF_UNLOCK_LKMGR_MUTEX(_m_)      lockmgr(&(_m_),LK_RELEASE,NULL)
    
    
    /*
     * In NetBSD, kernel threads are simply processes which share several
     * substructures and never run in userspace.
     */
    #define RF_WAIT_COND(_c_,_m_)           \
            ltsleep(&(_c_), PRIBIO, "rfwcond", 0, &(_m_))
    #define RF_SIGNAL_COND(_c_)            wakeup_one(&(_c_))
    #define RF_BROADCAST_COND(_c_)         wakeup(&(_c_))
    #define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \
            kthread_create1((void (*)(void *))(_func_), (void *)(_arg_), \
                (struct proc **)&(_handle_), _name_)
    
    #define RF_CREATE_ENGINE_THREAD(_handle_, _func_, _arg_, _fmt_, _fmt_arg_) \
            kthread_create1((void (*)(void *))(_func_), (void *)(_arg_), \
                (struct proc **)&(_handle_), _fmt_, _fmt_arg_)
    
    #define rf_mutex_init(m) simple_lock_init(m)
    
    #endif                          /* !_RF__RF_THREADSTUFF_H_ */

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