When your thread gets pulled from execution, its state is saved by the OS and that is not a cancellation of the thread. The cancellation means thread termination, on request, with the specific intent of letting everything in a final state when completed (aka. all resources are freed, all handlers are updated, etc.). What you … Read more
The problem with your implementation is that it calls sleepers.cancel() after sleepers has already raised. Technically the future returned by gather() is in a completed state, so its cancellation must be no-op. To correct the code, you just need to cancel the children yourself instead of trusting gather‘s future to do it. Of course, coroutines … Read more
Edit 2021 all platforms have converged on AbortController as the cancellation primitive and there is some built in support for this. In Node.js // import { setTimeout } from ‘timers/promises’ // in ESM const { setTimeout } = require(‘timers/promises’); const ac = new AbortController(); // cancellable timeout (async () => { await setTimeout(1000, null, { … Read more
GCD does not perform preemptive cancelations. So, to stop a work item that has already started, you have to test for cancelations yourself. In Swift, cancel the DispatchWorkItem. In Objective-C, call dispatch_block_cancel on the block you created with dispatch_block_create. You can then test to see if was canceled or not with isCancelled in Swift (known … Read more
I just blogged about it here: CancellationToken and Thread.Sleep in Short: var cancelled = token.WaitHandle.WaitOne(TimeSpan.FromSeconds(5)); In your context: void MyFunc (CancellationToken ct) { //… // simulate some long lasting operation that should be cancelable var cancelled = ct.WaitHandle.WaitOne(TimeSpan.FromSeconds(10)); }
Looking in the jQuery doc and code, I don’t see any way to cancel a jQuery deferred. Instead, you probably need a way in your resolveWith handler to know that a subsequent ajax call has already been fired and this ajax call should ignore its result. You could do that with a globally incrementing counter. … Read more
You can implement your work method as follows: private static void Work(CancellationToken cancelToken) { while (true) { if(cancelToken.IsCancellationRequested) { return; } Console.Write(“345”); } } That’s it. You always need to handle cancellation by yourself – exit from method when it is appropriate time to exit (so that your work and data is in consistent state) … Read more
To be consistent I would suggest 400 Bad Request now if your backend apps are capable of identifying when the client gets disconnected or if you reject or close the connection, probably you could return Nginx’ non-standard code 499 or 444. 499 Client Closed Request Used when the client has closed the request before the … Read more
I just blogged about it here: CancellationToken and Thread.Sleep in Short: var cancelled = token.WaitHandle.WaitOne(TimeSpan.FromSeconds(5)); In your context: void MyFunc (CancellationToken ct) { //… // simulate some long lasting operation that should be cancelable var cancelled = ct.WaitHandle.WaitOne(TimeSpan.FromSeconds(10)); }
The standard way to do this now is through AbortSignals async function update({ signal } = {}) { // pass these to methods to cancel them internally in turn // this is implemented throughout Node.js and most of the web platform try { var urls = await getCdnUrls({ signal }); var metadata = await fetchMetaData(urls); … Read more