- Can create reader and writer locks (with key).
- A reader lock allows concurrent access for read-only operations.
- A writer lock allows exclusive access for operations.
- It based internally on TaskCompletionSources which will be queued.
//async lock AsyncLock asyncLock = new AsyncLock(); //async lock with key AsyncLock<string> asyncLock = new AsyncLock<string>(); //acquire reader lock var d1 = await asyncLock.ReaderLockAsync("123"); //release reader lock d1.Dispose(); //set timeout using CancellationTokenSource cts = new CancellationTokenSource(TimeSpan.FromSeconds(10)); //acquire writer lock using var d2 = await asyncLock.WriterLockAsync("123", cts.Token); //use writer lock scope to interrupt long running reader lock using (ReaderReleaser r1 = await asyncLock.ReaderLockAsync()) { //use reader lock if (..) { r1.UseWriterLockAsync(async () => { /*use writer lock here*/ }); } //continue with reader lock }