c++ - Qt moveToThread() vs 调用新线程我们什么时候使用每个线程

Question

我们什么时候在线程应用程序中使用每个函数调用。给定在同一个类中定义的两个函数 fun1() 和 fun2() 处理将数据读/写到缓冲区(队列操作)。实现多线程就这些。我们将不得不在单独的线程中运行这两个函数。现在假设第一个函数 read 在其线程开始时被调用。

is it better to use moveTothread ( second thread)for function write at the start of the first functions thread

或者

define the second function in a new thread class and call that thread at the start of the first thread.

Answer 1

就像 Piotr 回答的那样，您真的应该看看他建议的链接。
据我了解您的问题，这应该可以解决您的问题。
这是该博客的简化代码:

class Producer  
{  
public:
    Producer();  

public slots:
    void produce()
    { //do whatever to retrieve the data
      //and then emit a produced signal with the data
      emit produced(data);
      //if no more data, emit a finished signal
      emit finished();
    }

signals:
    void produced(QByteArray *data);
    void finished();
};

class Consumer
{
public:
    Consumer();

public slots:
    void consume(QByteArray *data)
    {
       //process that data
       //when finished processing emit a consumed signal
       emit consumed();
       //if no data left in queue emit finished
       emit finished();
    }
};

int main(...)
{
    QCoreApplication app(...);

    Producer producer;
    Consumer consumer;

    producer.connect(&consumer, SIGNAL(consumed()), SLOT(produce()));
    consumer.connect(&producer, SIGNAL(produced(QByteArray *)), SLOT(consume(QByteArray *));

    QThread producerThread;
    QThread consumerThread;
    producer.moveToThread(&producerThread);
    consumer.moveToThread(&consumerThread);

    //when producer thread is started, start to produce
    producer.connect(&producerThread, SIGNAL(started()), SLOT(produce()));

    //when consumer and producer are finished, stop the threads
    consumerThread.connect(&consumer, SIGNAL(finished()), SLOT(quit()));
    producerThread.connect(&producer, SIGNAL(finished()), SLOT(quit()));

    producerThread.start();
    consumerThread.start();

    return app.exec();
}