multithreading

问题 I guess it is sort of a code review, but here is my implementation of the producer / consumer pattern. What I would like to know is would there be a case in which the while loops in the ReceivingThread() or SendingThread() methods might stop executing. Please note that EnqueueSend(DataSendEnqeueInfo info) is called from multiple different threads and I probably can't use tasks here since I definitely have to consume commands in a separate thread. private Thread mReceivingThread; private

问题 In multithreading the global variables or resources are shared among threads. I'm using pthread library in c #include <stdio.h> #include <pthread.h> #include <unistd.h> void *worker(void *); int ctr = 0; pthread_mutex_t lock; int main(int argc, char *argv[]) { pthread_t t[2]; int i = 0; //~ pthread_mutex_init(&lock, NULL); while(i < 2) { pthread_create(&t[i], NULL, &worker, NULL); i++; } pthread_join(t[0], NULL); pthread_join(t[1], NULL); //~ pthread_mutex_destroy(&lock); //~ pthread_join(t[1

问题 The documentation on QObject::moveToThread() for Qt5.3 explains that the moveToThread() method can fail if the object has a parent. How would I detect this failure in my code? I realize that simply making sure that my object does not have a parent first is probably good enough, but as a defensive programming practice I would like to test the return value from all calls that may fail. EDIT: I want to stress here after some answers that I am fully aware that I can test if parent is 0 before

问题 I get this warning message and since I see this message I also started to see the Google Play Services isnt responding popup and it closes my application after some time. I have review similar questions but could not find out the reason. Following is a sample of my handler thread usage. I do not know what to do to avoid this problem. @Override public void find(Func1<RealmQuery<Artist>, RealmQuery<Artist>> query, Action1<Result<List<Artist>>> onResult) { if (query != null) { handlerThread =

问题 Is there a way to run async lambda synchronously? It is not allowed to modify lambda expression, it must be leaved as is. Copy/paste example(it's an abstraction): var loopCnt = 1000000; Action<List<int>> aslambda = async (l) => { Thread.Sleep(100); await Task.Run(() => { }); for (int i = 0; i < loopCnt; i++) { l.Add(i); } }; var lst = new List<int>(); aslambda(lst); //This runs asynchronously if (lst.Count < loopCnt-100) { ; } Solution: It is really a dilemma for me to accept one answer. I

问题 I am currently learning Swing, and I am new to GUI development in general. In my test application, I have multiple event listners for a single event source, and I am wondering which one of these event listeners will be excecuted first. Also, I am curious to know how Swing event-handling works in a single-threaded environment, especially when you have multiple listeners for a single event source. Lastly, I would like to know some common cases where I have to use multiple threads in Swing.

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago . I'm getting the hang of the async/await keywords in C#, and how they facilitate asynchronous programming - allowing the the thread to be used elsewhere whilst some I/O bound task like a db call is going on. I have read numerous times that async/await is for I/O bound tasks,

问题 I'm using pretty standard Threading.Event: Main thread gets to a point where its in a loop that runs: event.wait(60) The other blocks on a request until a reply is available and then initiates a: event.set() I would expect the main thread to select for 40 seconds, but this is not the case. From the Python 2.7 source Lib/threading.py: # Balancing act: We can't afford a pure busy loop, so we # have to sleep; but if we sleep the whole timeout time, # we'll be unresponsive. The scheme here sleeps

问题 I am using akka actor system for multi threading. It is working fine in normal use-cases. However, Akka is closing JVM on fatal error. Please let me know how I can configure Akka to disable "akka.jvm-exit-on-fatal-error" in java. Below is code. public class QueueListener implements MessageListener { private String _queueName=null; public static boolean isActorinit=false; public static ActorSystem system=null; private ActorRef myActor; public QueueListener(String actorId, String qName){ this.

问题 This question already has an answer here : Deadlock caused by thread.join() in a static block (1 answer) Closed 6 years ago . class A { static final int i; static { i = 128; Thread t = new Thread() { public void run() { System.out.println("i=" + i); } }; t.start(); try { t.join(); } catch (InterruptedException e) { Thread.currentThread().interrupt(); } } } public class MainTesting { public static void main(String[] args) { A a = new A(); System.out.println("finish"); } } I never get finish