src/Thread_RAMObserver.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // LameXP - Audio Encoder Front-End
   3 // Copyright (C) 2004-2018 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_RAMObserver.h"
  24 #include "Global.h"
  25
  26 //MUtils
  27 #include <MUtils/OSSupport.h>
  28 #include <MUtils/Exception.h>
  29
  30 //Qt
  31 #include <QDir>
  32
  33 //Windows includes
  34 #define NOMINMAX
  35 #define WIN32_LEAN_AND_MEAN
  36 #include <Windows.h>
  37
  38 ////////////////////////////////////////////////////////////
  39 // Constructor & Destructor
  40 ////////////////////////////////////////////////////////////
  41
  42 RAMObserverThread::RAMObserverThread(void)
  43 {
  44 }
  45
  46 RAMObserverThread::~RAMObserverThread(void)
  47 {
  48 }
  49
  50 ////////////////////////////////////////////////////////////
  51 // Protected functions
  52 ////////////////////////////////////////////////////////////
  53
  54 void RAMObserverThread::run(void)
  55 {
  56         qDebug("RAM observer started!");
  57
  58         try
  59         {
  60                 observe();
  61         }
  62         catch(const std::exception &error)
  63         {
  64                 MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nException error:\n%s\n", error.what());
  65                 MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
  66         }
  67         catch(...)
  68         {
  69                 MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nUnknown exception error!\n");
  70                 MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
  71         }
  72
  73         while(m_semaphore.available()) m_semaphore.tryAcquire();
  74 }
  75
  76 void RAMObserverThread::observe(void)
  77 {
  78         MEMORYSTATUSEX memoryStatus;
  79         double previous = -1.0;
  80
  81         forever
  82         {
  83                 memset(&memoryStatus, 0, sizeof(MEMORYSTATUSEX));
  84                 memoryStatus.dwLength = sizeof(MEMORYSTATUSEX);
  85
  86                 if(GlobalMemoryStatusEx(&memoryStatus))
  87                 {
  88                         double current = static_cast<double>(memoryStatus.dwMemoryLoad) / 100.0;
  89                         if(current != previous)
  90                         {
  91                                 emit currentUsageChanged(current);
  92                                 previous = current;
  93                         }
  94                 }
  95                 if(m_semaphore.tryAcquire(1, 2000)) break;
  96         }
  97 }
  98
  99 ////////////////////////////////////////////////////////////
 100 // SLOTS
 101 ////////////////////////////////////////////////////////////
 102
 103 /*NONE*/
 104
 105 ////////////////////////////////////////////////////////////
 106 // EVENTS
 107 ////////////////////////////////////////////////////////////
 108
 109 /*NONE*/