How to pass function of classe

[LeMoussel]

I have this class

 class MyTask
 {
 public:
 	// Function to be executed by thread function
 	void run()
 	{
 		std::cout << "Task Start" << std::endl;
 
 		// Check if thread is requested to stop ?
 		while (stopRequested() == false)
 		{
 			std::cout << "Doing Some Work" << std::endl;
 			std::this_thread::sleep_for(std::chrono::milliseconds(1000));
 
 		}
 		std::cout << "Task End" << std::endl;
 	}
 };

I do
MyTask task; ctpl::thread_pool testThreadPool(4);

How can I push task.run() to ctpl::thread_pool?
testThreadPool.push(task.run);, isn't correct

[pemsley]

task.run() needs to be static.

[armallen]

I was able to do such a thing without using static. Just do something like this:

    const std::function<void(int, MyTask&)> wrapMyTaskRun([&] (int id, MyTask & t) -> void
            {
                t.run();
            });

Then you can push to the thread pool:

MyTask task;
ctpl::thread_pool testThreadPool(4);
testThreadPool->push(wrapMyTaskRun, task);

I don't know if it is the optimal way to do this, but it works for me.

[nicolas-chan-42]

If you read the example.cpp carefully, you should see that there is an int id argument in every function passed into the thread pool.

Just add an int id into the argument of your run() and then you should be able to push it, i.e.
void run(int id) in your code of class.
And then you can push it using testThreadPool.push(task.run);

I don't know why, but CTPL requires all functions being pushed into the thread pool having an int argument as its first argument, regardless of the number of arguments actually used in the function.