src/Thread_DiskObserver.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2012 LoRd_MuldeR <MuldeR2@GMX.de>
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License along
  16 // with this program; if not, write to the Free Software Foundation, Inc.,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 // http://www.gnu.org/licenses/gpl-2.0.txt
  20 ///////////////////////////////////////////////////////////////////////////////
  21
  22 #include "Thread_DiskObserver.h"
  23
  24 #include "Global.h"
  25 #include "Model_Progress.h"
  26
  27 #include <QDir>
  28
  29 #define MIN_DISKSPACE 104857600ui64 //100 MB
  30
  31 ////////////////////////////////////////////////////////////
  32 // Constructor & Destructor
  33 ////////////////////////////////////////////////////////////
  34
  35 DiskObserverThread::DiskObserverThread(const QString &path)
  36 :
  37         m_path(makeRootDir(path))
  38 {
  39 }
  40
  41 DiskObserverThread::~DiskObserverThread(void)
  42 {
  43 }
  44
  45 ////////////////////////////////////////////////////////////
  46 // Protected functions
  47 ////////////////////////////////////////////////////////////
  48
  49 void DiskObserverThread::run(void)
  50 {
  51         qDebug("DiskSpace observer started!");
  52
  53         try
  54         {
  55                 observe();
  56         }
  57         catch(...)
  58         {
  59                 fflush(stdout);
  60                 fflush(stderr);
  61                 fprintf(stderr, "\nGURU MEDITATION !!!\n");
  62                 FatalAppExit(0, L"Unhandeled exception error, application will exit!");
  63                 TerminateProcess(GetCurrentProcess(), -1);
  64         }
  65
  66         while(m_semaphore.available()) m_semaphore.tryAcquire();
  67 }
  68
  69 void DiskObserverThread::observe(void)
  70 {
  71         unsigned __int64 minimumSpace = MIN_DISKSPACE;
  72         unsigned __int64 freeSpace, previousSpace = 0ui64;
  73         bool ok = false;
  74
  75         forever
  76         {
  77                 freeSpace = lamexp_free_diskspace(m_path, &ok);
  78                 if(ok)
  79                 {
  80                         if(freeSpace < minimumSpace)
  81                         {
  82                                 qWarning("Free diskspace on '%s' dropped below %s MB, only %s MB free!", m_path.toUtf8().constData(), QString::number(minimumSpace / 1048576ui64).toUtf8().constData(), QString::number(freeSpace / 1048576ui64).toUtf8().constData());
  83                                 emit messageLogged(tr("Low diskspace on drive '%1' detected (only %2 MB are free), problems can occur!").arg(QDir::toNativeSeparators(m_path), QString::number(freeSpace / 1048576ui64)), ProgressModel::SysMsg_Warning);
  84                                 minimumSpace = qMin(freeSpace, (minimumSpace >> 1));
  85                         }
  86                         if(freeSpace != previousSpace)
  87                         {
  88                                 emit freeSpaceChanged(freeSpace);
  89                                 previousSpace = freeSpace;
  90                         }
  91                 }
  92                 if(m_semaphore.tryAcquire(1, 2000)) break;
  93         }
  94 }
  95
  96 QString DiskObserverThread::makeRootDir(const QString &baseDir)
  97 {
  98         QDir dir(baseDir);
  99
 100         if(!dir.exists())
 101         {
 102                 return baseDir;
 103         }
 104
 105         bool success = true;
 106
 107         while(success)
 108         {
 109                 success = dir.cdUp();
 110         }
 111
 112         return dir.canonicalPath();
 113 }
 114
 115 ////////////////////////////////////////////////////////////
 116 // SLOTS
 117 ////////////////////////////////////////////////////////////
 118
 119 /*NONE*/
 120
 121 ////////////////////////////////////////////////////////////
 122 // EVENTS
 123 ////////////////////////////////////////////////////////////
 124
 125 /*NONE*/