A race condition occurs when two or more threads can access shared data and they try to change it at the same time. Because the thread scheduling algorithm can swap between threads at any time, you don’t know the order in which the threads will attempt to access the shared data. Therefore, the result of … Read more
A wait can be “woken up” by another thread calling notify on the monitor which is being waited on whereas a sleep cannot. Also a wait (and notify) must happen in a block synchronized on the monitor object whereas sleep does not: Object mon = …; synchronized (mon) { mon.wait(); } At this point the … Read more
Since this question was asked in 2010, there has been real simplification in how to do simple multithreading with Python with map and pool. The code below comes from an article/blog post that you should definitely check out (no affiliation) – Parallelism in one line: A Better Model for Day to Day Threading Tasks. I’ll … Read more
The simplest way is an anonymous method passed into Label.Invoke: // Running on the worker thread string newText = “abc”; form.Label.Invoke((MethodInvoker)delegate { // Running on the UI thread form.Label.Text = newText; }); // Back on the worker thread Notice that Invoke blocks execution until it completes–this is synchronous code. The question doesn’t ask about asynchronous … Read more
Both processes and threads are independent sequences of execution. The typical difference is that threads (of the same process) run in a shared memory space, while processes run in separate memory spaces. I’m not sure what “hardware” vs “software” threads you might be referring to. Threads are an operating environment feature, rather than a CPU … Read more
First, you have to learn to think like a Language Lawyer. The C++ specification does not make reference to any particular compiler, operating system, or CPU. It makes reference to an abstract machine that is a generalization of actual systems. In the Language Lawyer world, the job of the programmer is to write code for … Read more
Yes: implements Runnable is the preferred way to do it, IMO. You’re not really specialising the thread’s behaviour. You’re just giving it something to run. That means composition is the philosophically “purer” way to go. In practical terms, it means you can implement Runnable and extend from another class as well… and you can also … Read more