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rf_callback.c revision 1.21 
      1 /*	$NetBSD: rf_callback.c,v 1.21 2009/03/14 15:36:20 dsl Exp $	*/
      2 /*
      3  * Copyright (c) 1995 Carnegie-Mellon University.
      4  * All rights reserved.
      5  *
      6  * Author: 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  *
     31  * callback.c -- code to manipulate callback descriptor
     32  *
     33  ****************************************************************************/
     34 
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: rf_callback.c,v 1.21 2009/03/14 15:36:20 dsl Exp $");
     38 
     39 #include <dev/raidframe/raidframevar.h>
     40 #include <sys/pool.h>
     41 
     42 #include "rf_archs.h"
     43 #include "rf_threadstuff.h"
     44 #include "rf_callback.h"
     45 #include "rf_debugMem.h"
     46 #include "rf_general.h"
     47 #include "rf_shutdown.h"
     48 #include "rf_netbsd.h"
     49 
     50 #define RF_MAX_FREE_CALLBACK 64
     51 #define RF_MIN_FREE_CALLBACK 32
     52 
     53 static void rf_ShutdownCallback(void *);
     54 static void
     55 rf_ShutdownCallback(void *ignored)
     56 {
     57 	pool_destroy(&rf_pools.callback);
     58 }
     59 
     60 int
     61 rf_ConfigureCallback(RF_ShutdownList_t **listp)
     62 {
     63 
     64 	rf_pool_init(&rf_pools.callback, sizeof(RF_CallbackDesc_t),
     65 		     "rf_callbackpl", RF_MIN_FREE_CALLBACK, RF_MAX_FREE_CALLBACK);
     66 	rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL);
     67 
     68 	return (0);
     69 }
     70 
     71 RF_CallbackDesc_t *
     72 rf_AllocCallbackDesc()
     73 {
     74 	RF_CallbackDesc_t *p;
     75 
     76 	p = pool_get(&rf_pools.callback, PR_WAITOK);
     77 	return (p);
     78 }
     79 
     80 void
     81 rf_FreeCallbackDesc(RF_CallbackDesc_t *p)
     82 {
     83 	pool_put(&rf_pools.callback, p);
     84 }
     85