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rf_shutdown.c revision 1.6 
      1 /*	$NetBSD: rf_shutdown.c,v 1.6 2000/01/13 23:41:18 oster 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 "rf_types.h"
     37 #include "rf_threadstuff.h"
     38 #include "rf_shutdown.h"
     39 #include "rf_debugMem.h"
     40 #include "rf_freelist.h"
     41 
     42 static void
     43 rf_FreeShutdownEnt(RF_ShutdownList_t * ent)
     44 {
     45 	FREE(ent, M_RAIDFRAME);
     46 }
     47 
     48 int
     49 _rf_ShutdownCreate(
     50     RF_ShutdownList_t ** listp,
     51     void (*cleanup) (void *arg),
     52     void *arg,
     53     char *file,
     54     int line)
     55 {
     56 	RF_ShutdownList_t *ent;
     57 
     58 	/*
     59          * Have to directly allocate memory here, since we start up before
     60          * and shutdown after RAIDframe internal allocation system.
     61          */
     62 	/* 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     63 		M_RAIDFRAME, M_WAITOK); */
     64 	ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
     65 					   M_RAIDFRAME, M_NOWAIT);
     66 	if (ent == NULL)
     67 		return (ENOMEM);
     68 	ent->cleanup = cleanup;
     69 	ent->arg = arg;
     70 	ent->file = file;
     71 	ent->line = line;
     72 	ent->next = *listp;
     73 	*listp = ent;
     74 	return (0);
     75 }
     76 
     77 int
     78 rf_ShutdownList(RF_ShutdownList_t ** list)
     79 {
     80 	RF_ShutdownList_t *r, *next;
     81 	char   *file;
     82 	int     line;
     83 
     84 	for (r = *list; r; r = next) {
     85 		next = r->next;
     86 		file = r->file;
     87 		line = r->line;
     88 
     89 		if (rf_shutdownDebug) {
     90 			printf("call shutdown, created %s:%d\n", file, line);
     91 		}
     92 		r->cleanup(r->arg);
     93 
     94 		if (rf_shutdownDebug) {
     95 			printf("completed shutdown, created %s:%d\n", file, line);
     96 		}
     97 		rf_FreeShutdownEnt(r);
     98 	}
     99 	*list = NULL;
    100 	return (0);
    101 }
    102