src/Thread_DiskObserver.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2016 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, but always including the *additional*
   9 // restrictions defined in the "License.txt" file.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this program; if not, write to the Free Software Foundation, Inc.,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20 // http://www.gnu.org/licenses/gpl-2.0.txt
  21 ///////////////////////////////////////////////////////////////////////////////
  22
  23 #include "Thread_DiskObserver.h"
  24
  25 //Internal
  26 #include "Global.h"
  27 #include "Model_Progress.h"
  28
  29 //MUtils
  30 #include <MUtils/Global.h>
  31 #include <MUtils/OSSupport.h>
  32 #include <MUtils/Exception.h>
  33
  34 //Qt
  35 #include <QDir>
  36
  37 #define MIN_DISKSPACE 104857600ui64 //100 MB
  38
  39 ////////////////////////////////////////////////////////////
  40 // Constructor & Destructor
  41 ////////////////////////////////////////////////////////////
  42
  43 DiskObserverThread::DiskObserverThread(const QString &path)
  44 :
  45         m_path(makeRootDir(path))
  46 {
  47 }
  48
  49 DiskObserverThread::~DiskObserverThread(void)
  50 {
  51 }
  52
  53 ////////////////////////////////////////////////////////////
  54 // Protected functions
  55 ////////////////////////////////////////////////////////////
  56
  57 void DiskObserverThread::run(void)
  58 {
  59         qDebug("DiskSpace observer started!");
  60
  61         try
  62         {
  63                 observe();
  64         }
  65         catch(const std::exception &error)
  66         {
  67                 MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nException error:\n%s\n", error.what());
  68                 MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
  69         }
  70         catch(...)
  71         {
  72                 MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nUnknown exception error!\n");
  73                 MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
  74         }
  75
  76         while(m_semaphore.available()) m_semaphore.tryAcquire();
  77 }
  78
  79 void DiskObserverThread::observe(void)
  80 {
  81         quint64 minimumSpace = MIN_DISKSPACE;
  82         quint64 previousSpace = quint64(-1);
  83
  84         forever
  85         {
  86                 quint64 freeSpace = 0ui64;
  87                 if(MUtils::OS::free_diskspace(m_path, freeSpace))
  88                 {
  89                         if(freeSpace < minimumSpace)
  90                         {
  91                                 qWarning("Free diskspace on '%s' dropped below %s MB, only %s MB free!", MUTILS_UTF8(m_path), MUTILS_UTF8(QString::number(minimumSpace / 1048576ui64)), MUTILS_UTF8(QString::number(freeSpace / 1048576ui64)));
  92                                 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);
  93                                 minimumSpace = qMin(freeSpace, (minimumSpace >> 1));
  94                         }
  95                         if(freeSpace != previousSpace)
  96                         {
  97                                 emit freeSpaceChanged(freeSpace);
  98                                 previousSpace = freeSpace;
  99                         }
 100                 }
 101                 if(m_semaphore.tryAcquire(1, 2000)) break;
 102         }
 103 }
 104
 105 QString DiskObserverThread::makeRootDir(const QString &baseDir)
 106 {
 107         QDir dir(baseDir);
 108
 109         if(!dir.exists())
 110         {
 111                 return baseDir;
 112         }
 113
 114         bool success = true;
 115
 116         while(success)
 117         {
 118                 success = dir.cdUp();
 119         }
 120
 121         return dir.canonicalPath();
 122 }
 123
 124 ////////////////////////////////////////////////////////////
 125 // SLOTS
 126 ////////////////////////////////////////////////////////////
 127
 128 /*NONE*/
 129
 130 ////////////////////////////////////////////////////////////
 131 // EVENTS
 132 ////////////////////////////////////////////////////////////
 133
 134 /*NONE*/