cancellation

I'm building a form validation and to learn promises I decided to implement asynchronous validation functions using promise pattern: var validateAjax = function(value) { return new Promise(function(resolve, reject) { $.ajax('data.json', {data: {value: value}}).success(function(data, status, xhr) { if (data.valid) { resolve(xhr) } else { reject(data.message) } }).error(function(xhr, textStatus) { reject(textStatus) }) }) } //... var validators = [validateAjax]; $('body').delegate('.validate', 'keyup', function() { var value = $('#the-input').val(); var results = validators.map(function

How can I cancel exiting from particular form after Cancel button (or X at the top right corner, or Esc) was clicked? WPF: <Window ... x:Class="MyApp.MyView" ... /> <Button Content="Cancel" Command="{Binding CancelCommand}" IsCancel="True"/> </Window> ViewModel: public class MyViewModel : Screen { private CancelCommand cancelCommand; public CancelCommand CancelCommand { get { return cancelCommand; } } public MyViewModel() { cancelCommand = new CancelCommand(this); } } public class CancelCommand : ICommand { public CancelCommand(MyViewModel viewModel) { this.viewModel = viewModel; } public

if the function called by pthread_create has the following structure try{ ...code.... pthread_detach(pthread_self()); pthread_exit(NULL); }catch(...){ std::cout<<"I am here"<<std::endl; } why does the exception handler for ellipsis get called at the execution of pthread_exit ? (note that std::exception , for instance, are not thrown) eran At least in GCC pthread_exit might throw an ___forced_unwind exception, that is used for unwinding the stack during the thread exit. It does not inherit from std::exception , and therefore cannot be caught as one. If you do catch that exception, be sure to re

The POSIX specifies two types for thread cancellation type: PTHREAD_CANCEL_ASYNCHRONOUS , and PTHREAD_CANCEL_DEFERRED (set by pthread_setcanceltype(3) ) determining when pthread_cancel(3) should take effect. By my reading, the POSIX manual pages do not say much about these, but Linux manual page says the following about PTHREAD_CANCEL_ASYNCHRONOUS : The thread can be canceled at any time. (Typically, it will be canceled immediately upon receiving a cancellation request, but the system doesn't guarantee this.) I am curious about the meaning about the system doesn't guarantee this . I can easily

I'm trying to implement Future<> interface in my project. But it looks like documentation is a little bit vague for it. From official documentation we can deduce: Method cancel() does not throw exceptions like InterruptedException or ExecutionException. Moreover it has no the variant with timeout. So it looks like, it should NOT be blocking. Documentation says After this method returns, subsequent calls to isDone() will always return true. but boolean isDone() Returns true if this task completed. So if we run cancel() while the task is processing and cannot be canceled, this method should wait

I'm working on implementing pthread cancellation on Linux without any of the "unpleasant behavior" (some might say bugs) discussed in some of my other recent questions. The Linux/glibc approach to pthread cancellation so far has been to treat it as something that doesn't need kernel support, and that can be handled at the library level purely by enabling asynchronous cancellation before making a syscall, and restoring the previous cancellation state after the syscall returns. This has at least 2 problems, one of them extremely serious: Cancellation can act after the syscall has returned from