nonblocking

Here's some code that illustrates my problem: def blocking1(): while True: yield 'first blocking function example' def blocking2(): while True: yield 'second blocking function example' for i in blocking1(): print 'this will be shown' for i in blocking2(): print 'this will not be shown' I have two functions which contain while True loops. These will yield data which I will then log somewhere (most likely, to an sqlite database). I've been playing around with threading and have gotten it working. However, I don't really like it... What I would like to do is make my blocking functions

I see a lot of synchronous functions in the file system library . such as fs.readFileSync(filename, [options]) . How (and why) are these functions implemented if node has async/non-blocking IO and no sleep method - and can I use the same mechanism to implement other synchronous functions? fs.readFileSync() is really just a wrapper for the fs.readSync() function. So the question is how is fs.readSync() implemented compared to fs.read(). If you look at the implementations of these two functions they both take advantage of the bindings module. Which in this case is intialized to var binding =

What is the proper way to wait for the result of multiple actors in Akka? The Principles of Reactive Programming Coursera course had an exercise with a replicated key-value store. Without going into the details of the assignment, it required waiting on the acknowledgement of multiple actors before it could indicate the replication was complete. I implemented the assignment using a mutable map containing the outstanding requests, but I felt the solution had a 'bad smell'. I hoped there was a better way to implement what seems like a common scenario. In an attempt to uphold the classes' honor

What's the best way to implement a non-blocking socket in Java? Or is there such a thing? I have a program that communicates with a server through socket but I don't want the socket call to block/cause delay if there is a problem with the data/connection. Java non-blocking socket , introduced in Java 2 Standard Edition 1.4, allow net communication between applications without blocking the processes using the sockets. But what a non-blocking socket is, in which contexts it can be useful, and how it works? What a non-blocking socket is? A non-blocking socket allows I/O operation on a channel

So, am I missing something here? All javascript engines in popular modern browsers (as of 2011) are single-threaded . This means while EVENTS can occur asynchronously, they are still queued (in "single-file") to be executed. This means that all these techniques to load external javascript into an HTML page, they are really only to allow the download to happen asynchronously, the execution of the downloaded code however, always happens one (function) at a time, one file at a time. So other "tips" I've seen on the web to breakup and execute initializing code blocks using setTimeout, that would

I am using inotify to monitor a local file, for example "/root/temp" using inotify_add_watch(fd, "/root/temp", mask). When this file is deleted, the program will be blocked by read(fd, buf, bufSize) function. Even if I create a new "/root/temp" file, the program is still block by read function. I am wondering if inotify can detect that the monitored file is created and the read function can get something from fd so that read will not be blocked forever. Here is my code: uint32_t mask = IN_ALL_EVENTS; int fd = inotify_init(); int wd = inotify_add_watch(fd, "/root/temp", mask); char *buf = new

I wonder about the behaviour of socket on blocking and nonblocking actions. What happens to threads blocking on socket when the socket blocking mode changes ? Here is the scenario; thread1(T1) creates a UDP socket and fd = socket(AF_INET , SOCK_DGRAM, 0); T1 waiting(sleeping) for receive recv(fd, buf , sizeof(buf) , 0); and thread2(T2) changes socket mode to non-blocking before socket receive any data fcntl(fd, F_SETFL, O_NONBLOCK); what happens to T1 ? Is it signalled/waked because the socket is no more blocking ? The behavior is literally unspecified: fcntl is not required to unblock any