movetothread in threadpool

[JadeN001]

How to move an object to a specific thread of a threadpool ?

[Duplicate of https://forum.qt.io/topic/90726/movetothread-with-qthreadpool ~kshegunov]

[SGaist]

Hi,

Are you trying to move a thread to another thread ?

[JadeN001]

@SGaist i have corrected the question

[MokJ]

I'm not sure if we can specify the threads in threadpool, but I've just started to learn all this so...i'm not an expert.

[SGaist]

The idea behind QThreadPool is to use a QRunnable subclass object that does the job you want in another thread. You don't access the QThread objects used directly.

So what are you trying to achieve ?

[JadeN001]

@SGaist thank you.
i want to use particular thread from Qthreadpool.
for Ex:
worker->moveToThread(mythread);

here,as we are moving object in "mythread" same way i want to move object to the thread which is one of the Qthreadpool's thread.

[jsulm]

@JadeN001 said in movetothread in threadpool:

i want to use particular thread from Qthreadpool.

but why? Why do you care which thread from the pool is used?

[JadeN001]

@jsulm i want to move two objects in one thread

[SGaist]

Why do you need two different objects moved to the same thread ?

[JKSH]

If you want to choose a specific thread to use, then create your own QThread. Don't use QThreadPool.

QThreadPool is designed for situations where you don't care which thread is being used.

[MokJ]

you can do

movetoThread(QThread::currentThread);

in your runnable::run();

[JadeN001]

@JKSH can i use
connect(socket, SIGNAL(readyRead()),this, SLOT(readyread()));
In run() of qrunnable class.

[JKSH]

@JadeN001 said in movetothread in threadpool:

@JKSH can i use
connect(socket, SIGNAL(readyRead()),this, SLOT(readyread()));
In run() of qrunnable class.

I haven't done this before so I'm not 100% sure. It might be possible, but only if:

• Your QRunnable also runs its own event loop, AND
• You set your QRunnable's thread affinity correctly using QObject::moveToThread().

This feels messy/hacky to me though. Is there a reason why you don't want to use a worker QObject subclass plus a QThread instead?

[JadeN001]

@JKSH i have already done my task using qthread.but i want make it possible by doing same thing using qthreadpool because in qthread i have made vector of limited threads.I think that it might me possible with qthreadpool.

As i know qrunnable doesnt have its own qeventloop.

You set your QRunnable's thread affinity correctly using QObject::moveToThread().

for this what i experiment is :
In run() of subclass QRunnable:

void run()
{
   worker *w=new worker();
    w->moveToThread(QThread::currentThread());
    w->addclients(socketDescriptor);
}

it is correct or not i don't know but it works.

[JadeN001]

@SGaist
1.creating socket and store in o vector
2.Read the message from client
3.write that message to all clients.

these all task i want to do in SAME thread.
i have done that @mokj suggest me and it works.