this->m_comConnected || request.data().size() < 2){ emit m_modbus_fail(errorFail.value("ConnectionClosed")); return response; } if(m_functionCode == QModbusRequest::WriteSingleRegister){ QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents,30); QThread::msleep(30);...
近来用Qt编写一段多线程的TcpSocket通信程序,被其中Qt中报的几个warning搞晕了,一会儿是说“Cannot create children for a parent that is in a different thread”,有时候又是“QSocketNotifier: socket notifiers cannot be enabled from another thread”,还经常又Assert failure:Cannot send events toobjects owned...
Locks the mutex. If another thread has locked the mutex then this call will block until that thread has unlocked it. Calling this function multiple times on the same mutex from the same thread is allowed if this mutex is arecursive mutex. If this mutex is anon-recursive mutex, this functio...
.. // Qt enforces the rule that events can only be sent to objects in // the current thread, so receiver->d_func()->threadData is // equivalent to QThreadData::current(), just without the function // call overhead. // 事件只能在同一个线程被send QObjectPrivate *d = receiver->...
Qt线程中有一个公共的抽象类,所有的线程都是从这个QThread抽象类中派生的,要实现QThread中的纯虚函数run(),run()函数是通过start()函数来实现调用的。 1classMyThread :publicQThread { 2public: 3virtualvoidrun(); 4}; 5 6voidMyThread::run() ...
("QObject::startTimer: Timers can only be used with threads started with QThread");return0;}if(Q_UNLIKELY(thread()!=QThread::currentThread())){qWarning("QObject::startTimer: Timers cannot be started from another thread");return0;}int timerId=d->threadData->eventDispatcher.load()->...
qDebug() << __FUNCTION__ << QThread::currentThreadId() << QThread::currentThread(); }); #endif 做了一个简单的界面,通过点击按钮来调用 QtConCurrent::run函数。 这里在按钮的槽函数中用了两种方法来调用,一种是调用外部 extern 函数,一种是使用了Lambda函数,两种方式只是写法上的不同,结果都是一样...
To create a thread, subclass QThread and reimplement its run() function. For example:class MyThread : public QThread { Q_OBJECT protected: void run(); }; void MyThread::run() { ... }Then, create an instance of the thread object and call QThread::start(). The code that appears ...
You can have a timer thread that sleep for some time and wake up, wake another thread that does the actual job with a semaphore then goes back to sleep. The working thread does a slice of job then wait on the semaphore again. QThread::sleep does not rely on event loop and may have...
How to properly quit an event-based thread that needs to clean up resources? I need to properly quit a thread that only processes signals from another threads. This thread owns a resources that need to be cleaned up. Before the thread will be quit, I call it's abort function, ... ...