147 lines
4.0 KiB
C++
147 lines
4.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// LameXP - Audio Encoder Front-End
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// Copyright (C) 2004-2018 LoRd_MuldeR <MuldeR2@GMX.de>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version, but always including the *additional*
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// restrictions defined in the "License.txt" file.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// http://www.gnu.org/licenses/gpl-2.0.txt
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///////////////////////////////////////////////////////////////////////////////
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//Internal
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#include "Thread_CPUObserver.h"
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#include "Global.h"
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//MUtils
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#include <MUtils/OSSupport.h>
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#include <MUtils/Exception.h>
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//Qt
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#include <QDir>
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//Windows includes
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#define NOMINMAX
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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////////////////////////////////////////////////////////////
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// Constructor & Destructor
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////////////////////////////////////////////////////////////
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CPUObserverThread::CPUObserverThread(void)
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{
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}
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CPUObserverThread::~CPUObserverThread(void)
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{
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}
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////////////////////////////////////////////////////////////
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// Protected functions
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////////////////////////////////////////////////////////////
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void CPUObserverThread::run(void)
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{
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qDebug("CPU observer started!");
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try
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{
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observe();
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}
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catch(const std::exception &error)
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{
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MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nException error:\n%s\n", error.what());
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MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
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}
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catch(...)
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{
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MUTILS_PRINT_ERROR("\nGURU MEDITATION !!!\n\nUnknown exception error!\n");
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MUtils::OS::fatal_exit(L"Unhandeled C++ exception error, application will exit!");
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}
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while(m_semaphore.available()) m_semaphore.tryAcquire();
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}
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ULONGLONG CPUObserverThread::filetime2ulonglong(const void *ftime)
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{
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ULARGE_INTEGER tmp; tmp.QuadPart = 0UI64;
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const FILETIME* fileTime = reinterpret_cast<const FILETIME*>(ftime);
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tmp.LowPart = fileTime->dwLowDateTime;
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tmp.HighPart = fileTime->dwHighDateTime;
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return tmp.QuadPart;
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}
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void CPUObserverThread::observe(void)
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{
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bool first = true;
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double previous = -1.0;
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FILETIME sysTime, usrTime, idlTime;
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ULONGLONG sys[2], usr[2], idl[2];
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for(size_t i = 0; i < 2; i++)
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{
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sys[i] = 0; usr[i] = 0; idl[i] = 0;
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}
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forever
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{
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if(GetSystemTimes(&idlTime, &sysTime, &usrTime))
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{
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sys[1] = sys[0]; sys[0] = filetime2ulonglong(&sysTime);
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usr[1] = usr[0]; usr[0] = filetime2ulonglong(&usrTime);
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idl[1] = idl[0]; idl[0] = filetime2ulonglong(&idlTime);
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if(first)
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{
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first = false;
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emit currentUsageChanged(1.0);
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msleep(250);
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continue;
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}
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ULONGLONG timeIdl = (idl[0] - idl[1]); //Idle time only
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ULONGLONG timeSys = (sys[0] - sys[1]); //Kernel mode time (incl. Idle time!)
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ULONGLONG timeUsr = (usr[0] - usr[1]); //User mode time only
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ULONGLONG timeSum = timeUsr + timeSys; //Overall CPU time that has elapsed
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ULONGLONG timeWrk = timeSum - timeIdl; //Time the CPU spent working
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if(timeSum > 0)
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{
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double current = static_cast<double>(timeWrk) / static_cast<double>(timeSum);
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if(current != previous)
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{
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emit currentUsageChanged(current);
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previous = current;
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}
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}
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}
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if(m_semaphore.tryAcquire(1, 2000)) break;
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}
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}
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////////////////////////////////////////////////////////////
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// SLOTS
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////////////////////////////////////////////////////////////
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/*NONE*/
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////////////////////////////////////////////////////////////
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// EVENTS
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////////////////////////////////////////////////////////////
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/*NONE*/
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