How to parse data to running thread ?

Qt embedded developer

I have created once queue that shared betweeen back end and front end thread

the front end thread is generated using sub class qthread.

for time being i am creating dummy data in that same thread and push that data into queue.

But Now i want to send data from c++ class to this running thread

What are the possible ways to do this thing ?

What is thread safe way to send data from c++ class to running qthread based sub class thread?

sierdzio

@Qt-embedded-developer The safest and easiest way is to use signals and slots. Then Qt will handle all synchronization logic.
If you want more customized solution, use standard thread syncing tools: mutexes, semaphores or if your data is very small - atomics.

Qt embedded developer

@sierdzio I have used signal and slot but my signal get emitted but slot is not get called

QObject::connect(_messageSendPtr.data(), SIGNAL(sigData(QString)), _guiComPtr.data(), SLOT(slotData(QString)), Qt::QueuedConnection);

what could be the reason?

sierdzio

@Qt-embedded-developer First: use functor based connections, they are much better.
Second: check the result of connect - maybe it was not successful.
Third: make the connection after you move the object to thread (if you do thread moving).

JonB

Duplicate https://forum.qt.io/topic/156213/what-should-be-best-mechanism-to-stop-and-start-same-thread-again

It would be nice if you did not double post so people try to answer in two places.....