File indexing completed on 2024-05-12 17:00:14

 /*
     SPDX-FileCopyrightText: 2020 David Redondo <kde@david-redondo.de>
 
     SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */
 
 #include "usagecomputer.h"
 
 #include <algorithm>
 
 void UsageComputer::setTicks(unsigned long long system, unsigned long long user, unsigned long long wait, unsigned long long idle)
 {
     // according to the documentation some counters can go backwards in some circumstances
     auto systemDiff = std::max(system - m_systemTicks, 0ull);
     auto userDiff = std::max(user - m_userTicks, 0ull);
     auto waitDiff = std::max(wait - m_waitTicks, 0ull);
 
     unsigned long long totalTicks = system + user + wait + idle;
     auto totalDiff = std::max(totalTicks - m_totalTicks, 0ull);
 
     auto percentage =  [totalDiff] (unsigned long long tickDiff) {
         if (tickDiff > 0 && totalDiff > 0) {
             return 100.0 * tickDiff / totalDiff;
         }
         return 0.0;
     };
 
     systemUsage = percentage(systemDiff);
     userUsage = percentage(userDiff);
     waitUsage = percentage(waitDiff);
     totalUsage = percentage(systemDiff + userDiff + waitDiff);
 
     m_totalTicks = totalTicks;
     m_systemTicks = system;
     m_userTicks = user;
     m_waitTicks = wait;
 }