multithreading

问题 I have a runnable task where i am trying to Autowire field but when i do it the task doesn't run . When i Autowire the field outside the runnable it works fine . Why is this happening ? Also is there any other cleaner way to get new instances of a autowired field inside runnable other than Autowiring it inside ? Here's my runnable method ` Runnable task = new Runnable() { @Autowired ICruxPanelClientService CruxPanelClientService; public void run (){ CruxPanelClientService

问题 I have a program that downloads a binary file, from another PC. I also have a another standalone program that can convert this binary file to a human readable CSV. I would like to bring the conversion tool "into" the download tool, creating a thread in the download tool that kicks off the conversion code (so it can start converting while it is downloading, reducing the total time of download and convert independently). I believe I can successfully kick off another thread but how do I

问题 I have a program that downloads a binary file, from another PC. I also have a another standalone program that can convert this binary file to a human readable CSV. I would like to bring the conversion tool "into" the download tool, creating a thread in the download tool that kicks off the conversion code (so it can start converting while it is downloading, reducing the total time of download and convert independently). I believe I can successfully kick off another thread but how do I

问题 The tutorials, manuals and other resources I read about fork() usually only contain examples which could be solved much better with threads. They just communicate, do some very basic tasks, and communicate again to share or display the results. I have the feeling that unless your intention is starting a foreign program, (by having the father continuing and the child starting that foreign program), threads are always easier to handle, more flexible, and safer than forks. Is there any other

问题 I know that I can check the state of the std::future the following way: my_future.wait_for(std::chrono::seconds(0)) == std::future_status::ready But according to cppreference.com std::future::wait_for may block in some cases: This function may block for longer than timeout_duration due to scheduling or resource contention delays. Is it still the case when timeout_duration is 0 ? If so, is there another way to query the state in a guaranteed wait-free manner ? 回答1: The quote from cppreference

问题 The whole point of the backgroundWorker is to update the UI after a time-consuming task. The component works as advertised in my WPF app. However in my test, the callback is not invoked on the calling thread. [Test] public void TestCallbackIsInvokedOnClientThread() { var clientId = Thread.CurrentThread.ManagedThreadId; int callbackThreadId = -1; var manualEvent = new ManualResetEventSlim(false); var someUIControl = new TextBox(); var bw = new BackgroundWorker(); bw.DoWork += (s,e) => e.Result

问题 I am learning multi threading concepts (in general and targeted to C#.NET). Reading different articles, still could not fully understand few basic concepts. I post this question. "Hans Passant" explained it well but I was not able to understand some of its part. So I started googling. I read this question which have no answers. Is Multithreading and MTA same? Suppose I write a WinForm application which is STA (as mentioned above its Main() method), still I can create multiple threads in my

问题 How can something like a ThreadStatic be used in a TPL Task? My understanding ("Wrox Professional Parallel Programming with C#", p74) is that a Task can switch from one thread to another during execution. What I want to do? I want to maintain a session id inside a static class so I don't need to pass this id to all of my methods. My library has methods like login(id) , logout(id) and many methods which operate on credentials associated with this id. But I don't want to pass this id to every

问题 How can something like a ThreadStatic be used in a TPL Task? My understanding ("Wrox Professional Parallel Programming with C#", p74) is that a Task can switch from one thread to another during execution. What I want to do? I want to maintain a session id inside a static class so I don't need to pass this id to all of my methods. My library has methods like login(id) , logout(id) and many methods which operate on credentials associated with this id. But I don't want to pass this id to every

问题 I am trying to create this function in order to exec another function after X time: void execAfter(double time, void *(*func)(void *), t_params *params); I have made an Thread encapsulation and a Time encapsulation (objects Thread and Time). What I want to do in pseudo code: Call execAfter instantiate Thread call thread->create(*funcToExec, *params, timeToWait) [inside thread, leaving execAfter] instanciate Time object wait for X time exec funcToExec delete Time object [leaving thread, back