Qt_Thread_Mutex - 8BitsCoding/RobotMentor GitHub Wiki

#include <QtCore>
#include <QMutex>

// Main
#include "mythread.h"

int sharedVar = 10;
QMutex mMutex;

MyThread mThread1(&mMutex, 1, &sharedVar);
MyThread mThread2(&mMutex, 2, &sharedVar);

mThread1.start();   // thread실행
mThread2.start();   // thread실행

#ifndef MYTHREAD_H
#define MYTHREAD_H

#include <QtCore>
#include <QMutex>

class MyThread : public QThread
{
public:
    MyThread(QMutex* mu, int myNum, int* sharedNum);
    int myNumber;
    int* num;
private:
    QMutex* mutex
proteced:
    void run();
};
#endif  //MYTHREAD_H

#include "mythread.h"

#include <QtCore>
#include <QDebug>
#include <QMutexLocker>

MyThread::MyThread(QMutex* mu, int myNum, int* sharedNum)
{
    mutex = mu;
    myNumber = myNum;
    num = sharedNum;
}

void MyThread::run() 
{
    qDebug() << "Thread " << myNumber << "num: " << num << "*num: " << *num;

    for(int i = 0; i < 5; i++) {
        mutex->lock();
        (*num) = myNumber;
        usleep(10);
        if(*num!=myNumber){
            qDebug() << "! collision ! at Thread" << myNumber;
        }
        qDebug() << i << "After Change, My number: " << myNumber << "*num" << *num;
        mutex->unlock();
        usleep(1);
    }
}