CEmu diff

diff --git a/gui/qt/emuthread.cpp b/gui/qt/emuthread.cpp
index e72fa51..4741e1c 100644
--- a/gui/qt/emuthread.cpp
+++ b/gui/qt/emuthread.cpp
@@ -20,7 +20,6 @@
 #include <thread>

 #include <QtCore/QEventLoop>
-#include <QtCore/QTimer>

 #include "mainwindow.h"

@@ -76,7 +75,8 @@ EmuThread::EmuThread(QObject *p) : QThread(p) {
     assert(emu_thread == nullptr);
     emu_thread = this;
     speed = actualSpeed = 100;
-    last_time = std::chrono::steady_clock::now();
+    timer.start();
+    last_time = timer.elapsed();
 }

 void EmuThread::changeEmuSpeed(int value) {
@@ -131,7 +131,7 @@ void EmuThread::setDebugStepOutMode() {

 //Called occasionally, only way to do something in the same thread the emulator runs in.
 void EmuThread::doStuff(bool wait_for) {
-    std::chrono::steady_clock::time_point cur_time = std::chrono::steady_clock::now();
+    qint64 cur_time = timer.elapsed();

     (void)wait_for;

@@ -150,7 +150,7 @@ void EmuThread::doStuff(bool wait_for) {
         openDebugger(DBG_USER, 0);
     }

-    last_time += std::chrono::steady_clock::now() - cur_time;
+    last_time += timer.elapsed() - cur_time;
 }

 void EmuThread::setActualSpeed(int value) {
@@ -160,18 +160,18 @@ void EmuThread::setActualSpeed(int value) {
 }

 void EmuThread::throttleTimerWait() {
-    std::chrono::duration<int, std::ratio<100, 60>> unit(1);
-    std::chrono::steady_clock::duration interval(std::chrono::duration_cast<std::chrono::steady_clock::duration>
-                                                 (std::chrono::duration<int, std::ratio<1, 60 * 1000000>>(1000000 * 100 / speed)));
-    std::chrono::steady_clock::time_point cur_time = std::chrono::steady_clock::now(), next_time = last_time + interval;
+    qint64 interval = 100000 / (60 * speed);
+    qint64 cur_time = timer.elapsed(), next_time = last_time + interval;
+
     if (throttle_on && cur_time < next_time) {
         setActualSpeed(speed);
         last_time = next_time;
-        std::this_thread::sleep_until(next_time);
+        QThread::msleep(interval);
     } else {
-        setActualSpeed(unit / (cur_time - last_time));
+        if ((cur_time - last_time) == 0) cur_time++;
+        setActualSpeed(100 * (interval / (cur_time - last_time)));
         last_time = cur_time;
-        std::this_thread::yield();
+        QThread::yieldCurrentThread();
     }
 }

diff --git a/gui/qt/emuthread.h b/gui/qt/emuthread.h
index 213881b..6bfbecc 100644
--- a/gui/qt/emuthread.h
+++ b/gui/qt/emuthread.h
@@ -2,6 +2,7 @@
 #define EMUTHREAD_H

 #include <QtCore/QThread>
+#include <QtCore/QElapsedTimer>

 #include <chrono>

@@ -55,7 +56,10 @@ private:
     bool enter_receive_state = false;
     bool throttle_on = true;
     int speed, actualSpeed;
-    std::chrono::steady_clock::time_point last_time;
+
+    QElapsedTimer timer;
+    qint64 last_time;
+
 };

 // For friends