File indexing completed on 2025-06-29 04:09:05

 /***************************************************************************
                             datacollection.cpp
                              -------------------
     begin                : June 12, 2003
     copyright            : (C) 2003 The University of Toronto
     email                : netterfield@astro.utoronto.ca
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 #include "datacollection.h"
 
 #include <config.h>
 
 #include <stdlib.h>
 #include <qapplication.h>
 
 #include "debug.h"
 #include "sysinfo.h"
 #include "psversion.h"
 
 #ifdef Q_OS_WIN
 #include <windows.h>
 #endif
 
 namespace Kst {
 
 static QMutex bigLock;
 
 
 double Data::AvailableMemory() {
   double one_GB = 1024.0*1024.0*1024.0;
   double available_memory = 0;
   
 #ifdef Q_OS_WIN
   // (http://msdn.microsoft.com/en-us/library/aa366589)
   MEMORYSTATUSEX statex;
   statex.dwLength = sizeof(statex);
   GlobalMemoryStatusEx(&statex);
   available_memory = statex.ullAvailPhys;
 #elif defined Q_OS_LINUX
   QMutexLocker ml(&bigLock);
   meminfo();
   available_memory = double(S(kb_main_free + kb_main_cached)) - 30.0*1024.0*1024.0; // 30MB margin
 #else
   // TODO other OSs
   // or assume 32-bit on a big system
   available_memory = 4 * one_GB;
 #endif
   Debug::self()->log(QString("Available memory: %1 GB").arg(available_memory/one_GB));
   return available_memory;
 }
 
 Data *Data::_self = 0L;
 void Data::cleanup() {
     delete _self;
     _self = 0;
 }
 
 
 Data *Data::self() {
   Q_ASSERT(_self);
   return _self;
 }
 
 
 void Data::replaceSelf(Data *newInstance) {
   cleanup();
   _self = newInstance;
 }
 
 
 Data::Data() {
   qAddPostRoutine(Data::cleanup);
 }
 
 
 Data::~Data() {
 }
 
 
 void Data::removeCurveFromPlots(Relation *c) {
   Q_UNUSED(c)
   // meaningless in no GUI: no plots!
 }
 
 QList<PlotItemInterface*> Data::plotList() const {
   return QList<PlotItemInterface*>();
 }
 
 
 int Data::rows() const {
   return -1;
 }
 
 
 int Data::columns() const {
   return -1;
 }
 
 }
 
 // vim: ts=2 sw=2 et