Comments on: Using boost::threadpool with boost::future

By: pachanga

pachanga — Thu, 10 Dec 2009 06:59:24 +0000

This should be very easy to achieve with a simple wrapper around the task. For example:

template<typename Task, typename Callback
struct TaskWithNotification
{
  TaskWithNotification(Task t, Callback c)
    : task(t),
      callback(c)
  {}
 
  void operator()()
  {
     callback(task());
  }
};

…and the usage is straightforward:

submit_job(
   threadpool, 
   TaskWithNotification(
     boost::bind(LoadUserTask, userId), 
     boost::bind(OnUserLoad, _1))
);

In C++0x completion handler can be a lambda.

By: Denis Bazhenov

Denis Bazhenov — Wed, 09 Dec 2009 23:45:25 +0000

Conception of Futures very popular on Java Platform also. But there is one thing that I’m missing in Futures - asynchronous completition. Sometimes there is no need to wait for task to complete. All I need is to give task and completition function to thread pool. For example:

Callable task = new LoadUserTask(userId);
executor.submit(task, new CompletionHandler {
  public void onComplete(User user) {
    user.setLastLoginTime(now());
  }
});

Is there something similar in C++?