说明:在复现过程中出现两点问题(1)run()函数中对m_diceValued的赋值(2)do_timeOut()函数中没有对m_seq、m_diceValued进行定义。修改后的复现程序如下所示:
主线程:
.h文章来源:https://www.toymoban.com/news/detail-731770.html
#pragma once
#include <QtWidgets/QMainWindow>
#include "ui_ThreadTest_one.h"
#include "QtClass.h"
class ThreadTest_one : public QMainWindow//主线程
{
Q_OBJECT
private:
QtClass* threadA;
QTimer* timer;//新定义定时器
protected:
void closeEvent(QCloseEvent* event);
public:
ThreadTest_one(QWidget* parent = nullptr);
~ThreadTest_one();
private:
Ui::ThreadTest_oneClass ui;
public slots:
void do_threadA_started();
void do_threadA_finished();
void on_actThread_Run_clicked();
void on_actDice_Run_clicked();
void on_actThread_Quit_clicked();
void on_actDict_Pause_clicked();
void do_timeOut();//新增定时器槽函数
};
.cpp
#include "ThreadTest_one.h"
#include <QCloseEvent>
#include <QThread>
#include <QTimer>
ThreadTest_one::ThreadTest_one(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
threadA = new QtClass(this);//创建工作线程
connect(threadA, &QtClass::started, this, &ThreadTest_one::do_threadA_started);
connect(threadA, &QtClass::finished, this, &ThreadTest_one::do_threadA_finished);
timer = new QTimer(this);
timer->setInterval(200);
connect(timer, &QTimer::timeout, this, &ThreadTest_one::do_timeOut);
}
void ThreadTest_one::do_timeOut() {
int tmpSeq = 0, tmpValue = 1;
int m_diceValue;
static int m_seq = 0;
bool valid = threadA->readValue(&tmpSeq, &tmpValue);//地址做实参,值会改变
if (valid&&(tmpSeq!=m_seq&&tmpSeq!=0)) {
m_seq = tmpSeq;
m_diceValue = tmpValue;
QString str = QString::asprintf("第%d次投骰子,点数为:%d",m_seq,m_diceValue);
ui.plainTextEdit->appendPlainText(str);
}
}
void ThreadTest_one::do_threadA_started() {
ui.statusBar->showMessage("Thread状态:thread start");
ui.actThread_Run->setEnabled(false);
ui.actThread_Quit->setEnabled(true);
ui.actDice_Run->setEnabled(true);
}
void ThreadTest_one::do_threadA_finished() {
ui.statusBar->showMessage("Thread状态:thread finished");
ui.actThread_Run->setEnabled(true);
ui.actThread_Quit->setEnabled(false);
ui.actDice_Run->setEnabled(false);
ui.actDict_Pause->setEnabled(false);
}
//按键的槽函数
void ThreadTest_one::on_actThread_Run_clicked() {//要用clicked才能得到响应
threadA->start();
}
void ThreadTest_one::on_actThread_Quit_clicked() {
threadA->stopThread();
}
void ThreadTest_one::on_actDice_Run_clicked() {
threadA->diceBegin();
timer->start();
ui.actDice_Run->setEnabled(false);
ui.actDict_Pause->setEnabled(true);
}
void ThreadTest_one::on_actDict_Pause_clicked() {
threadA->dicePause();
timer->stop();
ui.actThread_Run->setEnabled(true);
ui.actDict_Pause->setEnabled(false);
}
//重定义事件处理函数,确保窗口关闭时线程被停止
void ThreadTest_one::closeEvent(QCloseEvent* event) {
if (threadA->isRunning()) {
threadA->terminate();
threadA->wait();
}
event->accept();
}
ThreadTest_one::~ThreadTest_one()
{}
工作线程:
.h
#pragma once
#include <QThread>
#include <QMutex>
class QtClass : public QThread
{
Q_OBJECT
public:
QtClass(QObject *parent);
~QtClass();
private:
int m_seq = 0; //掷骰子次数的序号
int m_diceValue;//骰子的点数
bool m_paused = true;//暂停投骰子
bool m_stop = false;//停止线程
QMutex mutex;//基于互斥量的线程同步,定义一个互斥量
protected:
void run();//线程的任务,线程的事件循环
public:
void diceBegin();//开始掷骰子
void dicePause();//暂停投骰子
void stopThread();//停止线程
bool readValue(int *seq, int *diceValue);//供主线程读取数据的函数
};
.cpp文章来源地址https://www.toymoban.com/news/detail-731770.html
#include "QtClass.h"
#include<QRandomGenerator>
#include<QThread>
QtClass::QtClass(QObject *parent)
: QThread(parent)
{}
void QtClass::diceBegin() {//开始掷骰子
m_paused = false;
}
void QtClass::dicePause() {//停止掷骰子
m_paused = true;
}
void QtClass::stopThread() {//停止线程
m_stop = true;
}
void QtClass::run() {//run函数处理事件循环
m_stop = false;
m_paused = true;
m_seq = 0;
while (!m_stop) {
if (!m_paused) {
mutex.lock();//锁定互斥量
m_diceValue = 0;
//for(int i=0;i<5;i++)
m_diceValue = QRandomGenerator::global()->bounded(1, 7);
//m_diceValue = m_diceValue / 5;
m_seq++;
mutex.unlock();//解锁互斥量
}
msleep(500);
}
quit();//退出线程
}
bool QtClass::readValue(int* seq, int* diceValue) {
if (mutex.tryLock(100)) {
*seq = m_seq;
*diceValue = m_diceValue;
mutex.unlock();
return true;
}
else
return false;
}
QtClass::~QtClass()
{}
到了这里,关于掷骰子的多线程应用程序2基于互斥量的线程同步(复现《Qt C++6.0》)的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章,希望大家以后多多支持TOY模板网!