No. Although you could use the ObjectInputStream in another thread and check to see whether that has an object available. Generally polling isn’t a great idea, particularly with the poor guarantees of InputStream.available.
The default run() implementation in QThread runs an event loop for you, the equivalent of: class GenericThread(QThread): def run(self, *args): self.exec_() The important thing about an event loop is that it allows objects owned by the thread to receive events on their slots, which will be executed in that thread. Those objects are just QObjects, … Read more
Here’s a description of a sequence of events for your three requests: Three requests are sent to the node.js web server. Whichever request arrives fractionally before the other two will trigger the web server request handler and it will start executing. The other two requests go into the node.js event queue, waiting their turn. It’s … Read more
Before discussing which one is better, let’s take a look at the difference between these commands. Both DEL and UNLINK free the key part in blocking mode. And the difference is the way they free the value part. DEL always frees the value part in blocking mode. However, if the value is too large, e.g. … Read more
I think what you’re after is the child_process.fork() API. For example, if you have the following two files: In main.js: var cp = require(‘child_process’); var child = cp.fork(‘./worker’); child.on(‘message’, function(m) { // Receive results from child process console.log(‘received: ‘ + m); }); // Send child process some work child.send(‘Please up-case this string’); In worker.js: process.on(‘message’, … Read more
That’s just the way it’s defined. From the Open Group page for the open() function O_NONBLOCK When opening a FIFO with O_RDONLY or O_WRONLY set: If O_NONBLOCK is set: An open() for reading only will return without delay. An open() for writing only will return an error if no process currently has the file open … Read more
Did you try clearing the O_NONBLOCK flag? opts = opts & (~O_NONBLOCK)
I see this is an old question, but I think something was missed here, that @nickdu attempted to point out but wasn’t quite clear. There are four types of IO pertinent to this discussion: Blocking IO Non-Blocking IO Asynchronous IO Asynchronous Non-Blocking IO The confusion arises I think because of ambiguous definitions. So let me … Read more
Richard Dutton has a solution on his blog: while (true) { if (Console.KeyAvailable) { ConsoleKeyInfo key = Console.ReadKey(true); switch (key.Key) { case ConsoleKey.F1: Console.WriteLine(“You pressed F1!”); break; default: break; } } // Do something more useful }
To make your loop non-blocking, you must break it into sections and allow the JS event processing loop to consume user events before carrying on to the next section. The easiest way to achieve this is to do a certain amount of work, and then use setTimeout(…, 0) to queue the next chunk of work. … Read more