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rf_shutdown.c revision 1.20 
      1 /*	$NetBSD: rf_shutdown.c,v 1.20 2008/12/17 20:51:34 cegger 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 1.20 2008/12/17 20:51:34 cegger Exp $");
     38 
     39 #include <dev/raidframe/raidframevar.h>
     40 
     41 #include "rf_archs.h"
     42 #include "rf_shutdown.h"
     43 #include "rf_debugMem.h"
     44 
     45 
     46 #ifndef RF_DEBUG_SHUTDOWN
     47 #define RF_DEBUG_SHUTDOWN 0
     48 #endif
     49 
     50 static void rf_FreeShutdownEnt(RF_ShutdownList_t *);
     51 
     52 static void
     53 rf_FreeShutdownEnt(RF_ShutdownList_t *ent)
     54 {
     55 	free(ent, M_RAIDFRAME);
     56 }
     57 
     58 #if RF_DEBUG_SHUTDOWN
     59 void
     60 _rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
     61 		   void *arg, char *file, int line)
     62 #else
     63 void
     64 _rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
     65 		   void *arg)
     66 #endif
     67 {
     68 	RF_ShutdownList_t *ent;
     69 
     70 	/*
     71          * Have to directly allocate memory here, since we start up before
     72          * and shutdown after RAIDframe internal allocation system.
     73          */
     74 	/* 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     75 		M_RAIDFRAME, M_WAITOK); */
     76 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     77 					   M_RAIDFRAME, M_WAITOK);
     78 	ent->cleanup = cleanup;
     79 	ent->arg = arg;
     80 #if RF_DEBUG_SHUTDOWN
     81 	ent->file = file;
     82 	ent->line = line;
     83 #endif
     84 	ent->next = *listp;
     85 	*listp = ent;
     86 }
     87 
     88 void
     89 rf_ShutdownList(RF_ShutdownList_t **list)
     90 {
     91 	RF_ShutdownList_t *r, *next;
     92 #if RF_DEBUG_SHUTDOWN
     93 	char   *file;
     94 	int     line;
     95 #endif
     96 
     97 	for (r = *list; r; r = next) {
     98 		next = r->next;
     99 #if RF_DEBUG_SHUTDOWN
    100 		file = r->file;
    101 		line = r->line;
    102 
    103 		if (rf_shutdownDebug) {
    104 			printf("call shutdown, created %s:%d\n", file, line);
    105 		}
    106 #endif
    107 		r->cleanup(r->arg);
    108 #if RF_DEBUG_SHUTDOWN
    109 		if (rf_shutdownDebug) {
    110 			printf("completed shutdown, created %s:%d\n", file, line);
    111 		}
    112 #endif
    113 		rf_FreeShutdownEnt(r);
    114 	}
    115 	*list = NULL;
    116 }
    117