terminate

问题 Is there a way to perform some last actions when the user kills the application on iPhone? In UIApplicationDelegate there is applicationWillTerminate: but as I understand it's not guaranteed to get called when the application terminates. Is there another way? 回答1: You can't rely on applicationWillTerminate being called. From the documentation: For apps that do not support background execution or are linked against iOS 3.x or earlier, this method is always called when the user quits the app.

问题 How can I check whether current script in Ruby is being closed? Particularly, in case program is closing, I want to set @reconnect to false , not to allow web-socket reconnect any more. I tried Signal.trap("TERM") , but it doesn't seem to work. @reconnect is an instance variable inside WebsocketClient class, i can't directly change it in my script outside class. class WebsocketClient def ws_closed(event) $logger.warn "WS CLOSED" Signal.trap("TERM") { @stop = true @reconnect = false } unless

问题 I wanted to start a computation and terminate it on user Cancel. You say that calling Thead.stop() unlocks all monitors and raises ThreadDeath exception. This means that finally is still called. Suppose I do not care about the locks but want to release the resources allocated so far. I would like the canceller to know/wait until thread has finished released its allocations. Suppose the finally section has an infinite loop in the finally section. Will thread.join succeed to that thread? 回答1:

问题 I have problems saving settings in my application. This is done in the destructors of the relevant objects. It is a launcher and a termination by shutdown is a standard case. The only way the application actually saves the setting is by manual closing it or session shutdown (on cinnamon at least, I guess this just closes all windows). Even sudo reboot prevents the Qt application from unwinding the objects on the stack. Terminating by killall -s <signal> <app> has the same effect for SIGINT ,

问题 What is the best way to terminate a family of processes in Linux, if we assume that: arbitrary process in the family can get killed / terminates before we can start cleanup; as a result, if the child processes don't terminate, their PPID will be 1 processes can change process groups The particular scenario I'm looking at is Bash, but the more general technique, the better. 回答1: You may want to perform the killing (eventually via a script) in a different login shell to ensure you're not

问题 I am using the Executor framework to kick off several threads using a threadpool i.e newFixedThreadPool. I use threadpool.submit(aThread) to submit jobs to be executed by the threadpool and this works fine however I need to determine when all the threads are complete so that I can continue with other processing. I looked at using Future.get() which blocks until the thread is complete the problem here being that it blocks until a result is available. I also looked at using continuously calling

问题 within a vb script, I want to assign a variable with the process id of the cmd.exe in which the vb script is running. Is there any command? 回答1: Below is the example VB script procedure returning parent process caption and id: GetParentProcessInfo sCaption, sProcessId MsgBox "Parent Process Caption '" & sCaption & "'" & vbCrLf & "Parent Process Id '" & sProcessId & "'" Sub GetParentProcessInfo(sCaption, sProcessId) With GetObject("winmgmts:\\.\root\CIMV2:Win32_Process.Handle='" & CreateObject

问题 Could not find this answer online. When Ctrl+C is hit: When we don't have any shutdown hook, what happens to the running threads - do they each get hit with an InterruptedException? When we have shutdown hook(s), I know that the shutdown hooks get run in new threads in arbitrary order. But what happens to the existing running threads? Do they still each get hit with an InterruptedException? Thanks! 回答1: The classic book "Java Concurrency in Practice" has a chapter (7.4) on the JVM shutdown,

问题 In g++ and clang++ (in Linux at least) the following typical message is shown after an exception is thrown and not catch (uncaught exception): terminate called after throwing an instance of 'std::runtime_error' what(): Bye For example in: #include<stdexcept> int main(){ throw std::runtime_error("Bye"); } How do I customize the error message while still having full access to the thrown exception? The documentation (http://www.cplusplus.com/reference/exception/set_unexpected/) mentions set

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . def foo: return 1 print(varsum) would the print command still be executed, or would the program be terminated at return() 回答1: The print statement would not be executed. The program would not be terminated. The function would return, and execution would continue at the next frame up the stack. In C the entry