src/DiskIO/DiskDaemon/DiskDaemonDiskIOModule.cc

   1 /*
   2  * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "DiskDaemonDiskIOModule.h"
  11 #include "DiskdIOStrategy.h"
  12 #include "DiskIO/DiskDaemon/DiskdAction.h"
  13 #include "mgr/Registration.h"
  14 #include "Store.h"
  15
  16 DiskDaemonDiskIOModule::DiskDaemonDiskIOModule() : initialised(false)
  17 {
  18     ModuleAdd(*this);
  19 }
  20
  21 DiskDaemonDiskIOModule &
  22 DiskDaemonDiskIOModule::GetInstance()
  23 {
  24     return Instance;
  25 }
  26
  27 void
  28 DiskDaemonDiskIOModule::init()
  29 {
  30     /* We may be reused - for instance in coss - eventually.
  31      * When we do, we either need per-using-module stats (
  32      * no singleton pattern), or we need to refcount the
  33      * initialisation level and handle multiple clients.
  34      * RBC - 20030718.
  35      */
  36     assert(!initialised);
  37     memset(&diskd_stats, '\0', sizeof(diskd_stats));
  38 #if 0
  39     /*
  40      * DPW 2007-04-12
  41      * No debugging here please because this method is called before
  42      * the debug log is configured and we'll get the message on
  43      * stderr when doing things like 'squid -k reconfigure'
  44      */
  45     debugs(47, DBG_IMPORTANT, "diskd started");
  46 #endif
  47     initialised = true;
  48
  49     registerWithCacheManager();
  50 }
  51
  52 void
  53 DiskDaemonDiskIOModule::registerWithCacheManager(void)
  54 {
  55     Mgr::RegisterAction("diskd", "DISKD Stats", &DiskdAction::Create, 0, 1);
  56 }
  57
  58 void
  59 DiskDaemonDiskIOModule::gracefulShutdown()
  60 {
  61     initialised = false;
  62 }
  63
  64 DiskIOStrategy *
  65 DiskDaemonDiskIOModule::createStrategy()
  66 {
  67     return new DiskdIOStrategy();
  68 }
  69
  70 DiskDaemonDiskIOModule DiskDaemonDiskIOModule::Instance;
  71
  72 char const *
  73 DiskDaemonDiskIOModule::type () const
  74 {
  75     return "DiskDaemon";
  76 }
  77