src/Thread_DiskObserver.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2014 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 #include "Global.h"
  26 #include "Model_Progress.h"
  27
  28 #include <QDir>
  29
  30 #define MIN_DISKSPACE 104857600ui64 //100 MB
  31
  32 ////////////////////////////////////////////////////////////
  33 // Constructor & Destructor
  34 ////////////////////////////////////////////////////////////
  35
  36 DiskObserverThread::DiskObserverThread(const QString &path)
  37 :
  38         m_path(makeRootDir(path))
  39 {
  40 }
  41
  42 DiskObserverThread::~DiskObserverThread(void)
  43 {
  44 }
  45
  46 ////////////////////////////////////////////////////////////
  47 // Protected functions
  48 ////////////////////////////////////////////////////////////
  49
  50 void DiskObserverThread::run(void)
  51 {
  52         qDebug("DiskSpace observer started!");
  53
  54         try
  55         {
  56                 observe();
  57         }
  58         catch(const std::exception &error)
  59         {
  60                 PRINT_ERROR("\nGURU MEDITATION !!!\n\nException error:\n%s\n", error.what());
  61                 lamexp_fatal_exit("Unhandeled C++ exception error, application will exit!");
  62         }
  63         catch(...)
  64         {
  65                 PRINT_ERROR("\nGURU MEDITATION !!!\n\nUnknown exception error!\n");
  66                 lamexp_fatal_exit("Unhandeled C++ exception error, application will exit!");
  67         }
  68
  69         while(m_semaphore.available()) m_semaphore.tryAcquire();
  70 }
  71
  72 void DiskObserverThread::observe(void)
  73 {
  74         unsigned __int64 minimumSpace = MIN_DISKSPACE;
  75         unsigned __int64 freeSpace, previousSpace = 0ui64;
  76         bool ok = false;
  77
  78         forever
  79         {
  80                 freeSpace = lamexp_free_diskspace(m_path, &ok);
  81                 if(ok)
  82                 {
  83                         if(freeSpace < minimumSpace)
  84                         {
  85                                 qWarning("Free diskspace on '%s' dropped below %s MB, only %s MB free!", QUTF8(m_path), QUTF8(QString::number(minimumSpace / 1048576ui64)), QUTF8(QString::number(freeSpace / 1048576ui64)));
  86                                 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);
  87                                 minimumSpace = qMin(freeSpace, (minimumSpace >> 1));
  88                         }
  89                         if(freeSpace != previousSpace)
  90                         {
  91                                 emit freeSpaceChanged(freeSpace);
  92                                 previousSpace = freeSpace;
  93                         }
  94                 }
  95                 if(m_semaphore.tryAcquire(1, 2000)) break;
  96         }
  97 }
  98
  99 QString DiskObserverThread::makeRootDir(const QString &baseDir)
 100 {
 101         QDir dir(baseDir);
 102
 103         if(!dir.exists())
 104         {
 105                 return baseDir;
 106         }
 107
 108         bool success = true;
 109
 110         while(success)
 111         {
 112                 success = dir.cdUp();
 113         }
 114
 115         return dir.canonicalPath();
 116 }
 117
 118 ////////////////////////////////////////////////////////////
 119 // SLOTS
 120 ////////////////////////////////////////////////////////////
 121
 122 /*NONE*/
 123
 124 ////////////////////////////////////////////////////////////
 125 // EVENTS
 126 ////////////////////////////////////////////////////////////
 127
 128 /*NONE*/