/*      $NetBSD: rf_shutdown.c,v 1.21 2021/07/21 23:10:12 oster Exp $   */
/*
* rf_shutdown.c
*/
/*
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Jim Zelenka
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
*  Software Distribution Coordinator  or  [email protected]
*  School of Computer Science
*  Carnegie Mellon University
*  Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* Maintain lists of cleanup functions. Also, mechanisms for coordinating
* thread startup and shutdown.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rf_shutdown.c,v 1.21 2021/07/21 23:10:12 oster Exp $");

#include <dev/raidframe/raidframevar.h>

#include "rf_archs.h"
#include "rf_shutdown.h"
#include "rf_debugMem.h"


#ifndef RF_DEBUG_SHUTDOWN
#define RF_DEBUG_SHUTDOWN 0
#endif

static void rf_FreeShutdownEnt(RF_ShutdownList_t *);

static void
rf_FreeShutdownEnt(RF_ShutdownList_t *ent)
{
       free(ent, M_RAIDFRAME);
}

#if RF_DEBUG_SHUTDOWN
void
_rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
                  void *arg, char *file, int line)
#else
void
_rf_ShutdownCreate(RF_ShutdownList_t **listp,  void (*cleanup)(void *arg),
                  void *arg)
#endif
{
       RF_ShutdownList_t *ent;

       /*
        * Have to directly allocate memory here, since we start up before
        * and shutdown after RAIDframe internal allocation system.
        */
       ent = (RF_ShutdownList_t *) malloc(sizeof(RF_ShutdownList_t),
                                          M_RAIDFRAME, M_WAITOK);
       ent->cleanup = cleanup;
       ent->arg = arg;
#if RF_DEBUG_SHUTDOWN
       ent->file = file;
       ent->line = line;
#endif
       ent->next = *listp;
       *listp = ent;
}

void
rf_ShutdownList(RF_ShutdownList_t **list)
{
       RF_ShutdownList_t *r, *next;
#if RF_DEBUG_SHUTDOWN
       char   *file;
       int     line;
#endif

       for (r = *list; r; r = next) {
               next = r->next;
#if RF_DEBUG_SHUTDOWN
               file = r->file;
               line = r->line;

               if (rf_shutdownDebug) {
                       printf("call shutdown, created %s:%d\n", file, line);
               }
#endif
               r->cleanup(r->arg);
#if RF_DEBUG_SHUTDOWN
               if (rf_shutdownDebug) {
                       printf("completed shutdown, created %s:%d\n", file, line);
               }
#endif
               rf_FreeShutdownEnt(r);
       }
       *list = NULL;
}