sys/dev/raidframe/rf_shutdown.c

   1 /*      $NetBSD: rf_shutdown.c,v 1.19 2005/12/11 12:23:37 christos 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@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 1.19 2005/12/11 12:23:37 christos 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 }