Qt Threading and Concurrency QtConcurrent Run
Example
If you find managing QThreads and low-level primitives like mutexes or semaphores too complex, Qt Concurrent namespace is what you are looking for. It includes classes which allow more high-level thread management.
Let's look at Concurrent Run. QtConcurrent::run() allows to run function in a new thread. When would you like to use it? When you have some long operation and you don't want to create thread manually.
Now the code:
#include <qtconcurrentrun.h>
void longOperationFunction(string parameter)
{
// we are already in another thread
// long stuff here
}
void mainThreadFunction()
{
QFuture<void> f = run(longOperationFunction, "argToPass");
f.waitForFinished();
}
So things are simple: when we need to run another function in another thread, just call QtConcurrent::run, pass function and its parameters and that's it!
QFuture presents the result of our asynchronous computation. In case of QtConcurrent::run we can't cancel the function execution.
