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rf_shutdown.c revision 1.9 
      1 /*	$NetBSD: rf_shutdown.c,v 1.9 2001/11/13 07:11:16 lukem Exp $	*/
      2 /*
      3  * rf_shutdown.c
      4  */
      5 /*
      6  * Copyright (c) 1996 Carnegie-Mellon University.
      7  * All rights reserved.
      8  *
      9  * Author: Jim Zelenka
     10  *
     11  * Permission to use, copy, modify and distribute this software and
     12  * its documentation is hereby granted, provided that both the copyright
     13  * notice and this permission notice appear in all copies of the
     14  * software, derivative works or modified versions, and any portions
     15  * thereof, and that both notices appear in supporting documentation.
     16  *
     17  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     18  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     19  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     20  *
     21  * Carnegie Mellon requests users of this software to return to
     22  *
     23  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     24  *  School of Computer Science
     25  *  Carnegie Mellon University
     26  *  Pittsburgh PA 15213-3890
     27  *
     28  * any improvements or extensions that they make and grant Carnegie the
     29  * rights to redistribute these changes.
     30  */
     31 /*
     32  * Maintain lists of cleanup functions. Also, mechanisms for coordinating
     33  * thread startup and shutdown.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: rf_shutdown.c,v 1.9 2001/11/13 07:11:16 lukem Exp $");
     38 
     39 #include <dev/raidframe/raidframevar.h>
     40 
     41 #include "rf_archs.h"
     42 #include "rf_threadstuff.h"
     43 #include "rf_shutdown.h"
     44 #include "rf_debugMem.h"
     45 #include "rf_freelist.h"
     46 
     47 static void
     48 rf_FreeShutdownEnt(RF_ShutdownList_t * ent)
     49 {
     50 	FREE(ent, M_RAIDFRAME);
     51 }
     52 
     53 int
     54 _rf_ShutdownCreate(
     55     RF_ShutdownList_t ** listp,
     56     void (*cleanup) (void *arg),
     57     void *arg,
     58     char *file,
     59     int line)
     60 {
     61 	RF_ShutdownList_t *ent;
     62 
     63 	/*
     64          * Have to directly allocate memory here, since we start up before
     65          * and shutdown after RAIDframe internal allocation system.
     66          */
     67 	/* 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     68 		M_RAIDFRAME, M_WAITOK); */
     69 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     70 					   M_RAIDFRAME, M_NOWAIT);
     71 	if (ent == NULL)
     72 		return (ENOMEM);
     73 	ent->cleanup = cleanup;
     74 	ent->arg = arg;
     75 	ent->file = file;
     76 	ent->line = line;
     77 	ent->next = *listp;
     78 	*listp = ent;
     79 	return (0);
     80 }
     81 
     82 int
     83 rf_ShutdownList(RF_ShutdownList_t ** list)
     84 {
     85 	RF_ShutdownList_t *r, *next;
     86 	char   *file;
     87 	int     line;
     88 
     89 	for (r = *list; r; r = next) {
     90 		next = r->next;
     91 		file = r->file;
     92 		line = r->line;
     93 
     94 		if (rf_shutdownDebug) {
     95 			printf("call shutdown, created %s:%d\n", file, line);
     96 		}
     97 		r->cleanup(r->arg);
     98 
     99 		if (rf_shutdownDebug) {
    100 			printf("completed shutdown, created %s:%d\n", file, line);
    101 		}
    102 		rf_FreeShutdownEnt(r);
    103 	}
    104 	*list = NULL;
    105 	return (0);
    106 }
    107