Qt invoke slot another thread

Both the signal and slot are defined in the same class and running under the main GUI thread, but I call the emit in another function which is being controlled by a boost thread type of thread. I am using Qt4 and Ubuntu 10.04 is my OS. This function is called from another thread which is emitting the signal.

I agree, the simpler solution is a function call to "doInit" from the "process" slot, once. About the last paragraph and the qthread, I have read that subclassing qthreads is not the correct way to do it; So I instantiate a worker object (dataserver) and hoist it onto the new thread, with moveToThread. QThread Class | Qt 4.8 However, you are free to connect the Worker's slots to any signal, from any object, in any thread. It is safe to connect signals and slots across different threads, thanks to a mechanism called queued connections. Another way to make code run in a separate thread, is to subclass QThread and reimplement run(). For example: Talking to Qt Threads – Dave Smith's Blog - The Smith Fam this is regarding, in multi threading environment, where GUI thread will be handling , all GUI events. if i use a timer event for regular updations of GUI, timer event and slot connected with it, my doubt is , which thread will run the slot the definition, whether GUI thread or any other thread. Qt thread: run various methods in a separate thread (with ... This second post describes a way to have a separate thread capable of running various methods. Basically, you have a main thread (probably the GUI thread) and a second thread which you can call to execute multiple methods. When a method is called the thread will execute it and send a signal once it is done.

Qt: Access GUI From Another Thread? - Allegro

A Qt Quick game for touch devices that uses SpriteSequence, ParticleSystem, Emitter, and Wander types to animate objects and the SoundEffect type to play sound effects. Nested Eventloops To define the title: a nested eventloop is when you invoke the eventloop again rather than returning back to it. This is QCoreApplication::processEvents(), Q... QtNetwork Module The commands are executed later, when control returns to Qt's event loop. segfault on mac os x · Issue #711 · ipython/ipython · GitHub

Threads and QObjects | Qt 5.12

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logmessage from another thread to the mainwindow slot | Qt Forum...

Threads and QObjects | Qt 4.8 QThread inherits QObject.It emits signals to indicate that the thread started or finished executing, and provides a few slots as well. More interesting is that QObjects can be used in multiple threads, emit signals that invoke slots in other threads, and post events to objects that "live" in other threads. This is possible because each thread is allowed to have its own event loop. QThread, execute slot without signal | Qt Forum

Qt Thread Basics; QObject and Threads; Using a Mutex to Protect the Integrity of ..... A safe way of calling a slot in another thread is by placing that call in another ...

[SOLVED] run a function in another thread. ... You can't call a method of an object in another thread directly so instead you use signals and slots, which are thread safe, to it for you and to inform you of when the thread has started and finished. ... Using signals and slots to communicate between threads is thread-safe by intent and design as ... QThread, execute slot without signal | Qt Forum I have been researching about QThreads, and have found out that the best way to use thread is to inherit a QObject and then move that to another thread. Signals are important, because with a queued connection, I don't have to worry about locking anything.... Threads Events QObjects - Qt Wiki A function is thread-safe if it's safe to invoke it from more than one thread at the same time even if the invocations reference shared data. Events and the event loop. Being an event-driven toolkit, events and event delivery play a central role in Qt architecture.

Qt Signals & Slots: How they work | nidomiro But if one is in another thread, a Qt:: QueuedConnection is used instead to ensure thread-safety. Please keep in mind, if you have both QObjects in the same thread and connected them the connection type is Qt :: DirectConnection , even if you move one QObject to another thread afterwards.