等待队列的阻塞线程

Question

I have applications with 2 threads. In first (main) thread I want to generate some message and send it to second thread. Is there method to blocked thread for wait incoming message (like a queue in embended OS(FreeRTOS, TNKernel etc))?

while (true) {
   waitQueue(TIMEOUT_INFINITY); 
}

in waitQueue(TIMEOUT_INFINITY); current thread becomes blocked, when in main thread generates some message waitQueue releases thread.

Answer 1

The natural way for doing this in Qt is calling QThread::exec() in the thread (which is what the default implementation for QThread::run() do).

after that to execute a QObject instance (worker object)'s slots in that thread, you can set the instance's affinity to the new thread using QObject::moveToThread() , then when a signal connected to some slot in that instance is emitted, the slot will be invoked in the new thread.

Instantiating a QThread provides a parallel event loop, allowing QObject slots to be invoked in a secondary thread. Subclassing a QThread allows the application to initialize the new thread before starting its event loop, or to run parallel code without an event loop.

see QThread class , QObject class , Threads and QObject , along with Qt event loops .

Hope this helps. . .