线程启动start(),配合以下:QMutex m_mutex;while(!isInterruptionRequested()) {// isInterruptionRequested 决定线程停止,就是循环条件QMutexLockerlock(&m_mutex);// 给线程买一把锁}线程暂停:m_mutex.lock();线程继续:m_mutex.unlock();线程结束:thread->requestInterruption();// 循环退出,实现机制实际上是...
互斥锁声明:QMutexLocker mutexLocker(&m_Mutex); 互斥锁加锁:从声明处开始(在构造函数中加锁) 互斥锁解锁:出了作用域自动解锁(在析构函数中解锁) QMutex mutex;intcomplexFunction(intflag){QMutexLockerlocker(&mutex);intretVal=0;switch(flag){case0:case1:returnmoreComplexFunction(flag);case2:{intstatus...
3)线程中,m_Handle默认为空,定时1秒检测是否有接入usb void SerialThread::run() { while(m_IsRun) { m_Mutex.lock(); if(NULL == m_Handle) openUsb(); if(m_StartSend) sendData(); m_Mutex.unlock(); if(NULL == m_Handle) msleep(1000); else exec(); } } 4)根据指定pid、vid,打开us...
TextDevice::TextDevice() { m_count = 0; } void TextDevice::run() { exec(); } void TextDevice::stop() { quit(); } void TextDevice::write(const QString& text) { QMutexLocker locker(&m_mutex); qDebug() << QString("Call %1: %2").arg(m_count++).arg(text); } //TextTh...
29 QSingleton* QSingleton::m_pInstance = NULL; 上⾯的实现⼀种最简单的单利模式，是⼀种懒汉模式，所谓的懒汉模式就是在程序需要时才进⾏成员变量的创建也就是“延时加载”，与之相对的就是饿汉模式，恶汉模式就是在程序启动时就需要创建变量。懒汉模式是时间换空间，恶汉模式是空间换时间，看如下...
Qt的解决方式是QMutex。 比如下面的代码 QMutexmutex;intnumber=6;voidmethod1(){mutex.lock();number*=5;number/=4;mutex.unlock();}voidmethod2(){mutex.lock();number*=3;number/=2;mutex.unlock();} 在当前的项目中如何使用QMutex,首先在头文件MyThread class下添加一个公共字段bool Stop; ...
m_bStopped(false) { qDebug() <<"Worker Thread : "<< QThread::currentThreadId(); } ~WorkerThread() { stop(); quit(); wait(); } voidstop() { qDebug() <<"Worker Stop Thread : "<< QThread::currentThreadId(); QMutexLocker locker(&m_mutex); m_bStopped =true; } protected: ...
UserThread(QObject *r, QMutex *m, QWaitCondition *c);QObject *receiver;}void UserThread::run() //线程类启动函数,在该函数中创建了一个用户自定义事件{UserEvent *re = new UserEvent(resultstring);QThread::postEvent(receiver, re); }UserWidget类是用户定义的用于接收自定义事件的QWidget类的子类...
mutex.unlock()//解锁 mutex.tryLock()//尝试解锁,如果该互斥量已经锁住,它就会立即返回 For example, this complex function locks aQMutexupon entering the function and unlocks the mutex at all the exit points: int complexFunction(int flag)
static QMutex m_mutex;};#endif// GLOBAL_H #include "Global.h"Global* Global::m_instance = nullptr;QMutex Global::m_mutex;Global::Global(){ } Global::~Global(){ } Global *Global::GetInstance(){ if (m_instance == nullptr){ QMutexLocker locker(&m_mutex);if (m_instance == ...