src/Thread_RAMObserver.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_RAMObserver.h"
  23 #include "Global.h"
  24
  25 #include <QDir>
  26
  27 ////////////////////////////////////////////////////////////
  28 // Constructor & Destructor
  29 ////////////////////////////////////////////////////////////
  30
  31 RAMObserverThread::RAMObserverThread(void)
  32 {
  33 }
  34
  35 RAMObserverThread::~RAMObserverThread(void)
  36 {
  37 }
  38
  39 ////////////////////////////////////////////////////////////
  40 // Protected functions
  41 ////////////////////////////////////////////////////////////
  42
  43 void RAMObserverThread::run(void)
  44 {
  45         qDebug("RAM observer started!");
  46
  47         try
  48         {
  49                 observe();
  50         }
  51         catch(...)
  52         {
  53                 fflush(stdout);
  54                 fflush(stderr);
  55                 fprintf(stderr, "\nGURU MEDITATION !!!\n");
  56                 FatalAppExit(0, L"Unhandeled exception error, application will exit!");
  57                 TerminateProcess(GetCurrentProcess(), -1);
  58         }
  59
  60         while(m_semaphore.available()) m_semaphore.tryAcquire();
  61 }
  62
  63 void RAMObserverThread::observe(void)
  64 {
  65         MEMORYSTATUSEX memoryStatus;
  66         double previous = -1.0;
  67
  68         forever
  69         {
  70                 memset(&memoryStatus, 0, sizeof(MEMORYSTATUSEX));
  71                 memoryStatus.dwLength = sizeof(MEMORYSTATUSEX);
  72
  73                 if(GlobalMemoryStatusEx(&memoryStatus))
  74                 {
  75                         double current = static_cast<double>(memoryStatus.dwMemoryLoad) / 100.0;
  76                         if(current != previous)
  77                         {
  78                                 emit currentUsageChanged(current);
  79                                 previous = current;
  80                         }
  81                 }
  82                 if(m_semaphore.tryAcquire(1, 2000)) break;
  83         }
  84 }
  85
  86 ////////////////////////////////////////////////////////////
  87 // SLOTS
  88 ////////////////////////////////////////////////////////////
  89
  90 /*NONE*/
  91
  92 ////////////////////////////////////////////////////////////
  93 // EVENTS
  94 ////////////////////////////////////////////////////////////
  95
  96 /*NONE*/