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rf_callback.c revision 1.8 
      1 /*	$NetBSD: rf_callback.c,v 1.8 2002/10/25 03:14:37 oster 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 1.8 2002/10/25 03:14:37 oster 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_freelist.h"
     47 #include "rf_shutdown.h"
     48 
     49 static struct pool rf_callback_pool;
     50 
     51 #define RF_MAX_FREE_CALLBACK 64
     52 #define RF_CALLBACK_INC       4
     53 #define RF_CALLBACK_INITIAL  32
     54 
     55 static void rf_ShutdownCallback(void *);
     56 static void
     57 rf_ShutdownCallback(ignored)
     58 	void   *ignored;
     59 {
     60 	pool_destroy(&rf_callback_pool);
     61 }
     62 
     63 int
     64 rf_ConfigureCallback(listp)
     65 	RF_ShutdownList_t **listp;
     66 {
     67 	int     rc;
     68 
     69 	pool_init(&rf_callback_pool, sizeof(RF_CallbackDesc_t), 0, 0,
     70 		  RF_CALLBACK_INITIAL, "rf_callbackpl", NULL);
     71 	pool_sethiwat(&rf_callback_pool, RF_MAX_FREE_CALLBACK);
     72 	rc = rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL);
     73 	if (rc) {
     74 		rf_print_unable_to_add_shutdown(__FILE__,__LINE__, rc);
     75 		rf_ShutdownCallback(NULL);
     76 		return (rc);
     77 	}
     78 	return (0);
     79 }
     80 
     81 RF_CallbackDesc_t *
     82 rf_AllocCallbackDesc()
     83 {
     84 	RF_CallbackDesc_t *p;
     85 
     86 	p = pool_get(&rf_callback_pool, PR_NOWAIT);
     87 	return (p);
     88 }
     89 
     90 void
     91 rf_FreeCallbackDesc(p)
     92 	RF_CallbackDesc_t *p;
     93 {
     94 	pool_put(&rf_callback_pool, p);
     95 }
     96