-pthread tells the compiler to link in the pthread library as well as configure the compilation for threads. For example, the following shows the macros that get defined when the -pthread option gets used on the GCC package installed on my Ubuntu machine: $ gcc -pthread -E -dM test.c > dm.pthread.txt $ gcc -E -dM … Read more
SimpleDateFormat stores intermediate results in instance fields. So if one instance is used by two threads they can mess each other’s results. Looking at the source code reveals that there is a Calendar instance field, which is used by operations on DateFormat / SimpleDateFormat. For example parse(..) calls calendar.clear() initially and then calendar.add(..). If another … Read more
Lee’s approach can be simplified further public static void InvokeIfRequired(this Control control, MethodInvoker action) { // See Update 2 for edits Mike de Klerk suggests to insert here. if (control.InvokeRequired) { control.Invoke(action); } else { action(); } } And can be called like this richEditControl1.InvokeIfRequired(() => { // Do anything you want with the control … Read more
What’s likely happening is that SignalData is indirectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing foreach(Subscriber s in subscribers.Values) To foreach(Subscriber s in subscribers.Values.ToList()) If I’m right, the problem will disappear. Calling subscribers.Values.ToList() copies the values of subscribers.Values to a separate … Read more
You can’t use global variables to hold this sort of data. Not only is it not thread safe, it’s not process safe, and WSGI servers in production spawn multiple processes. Not only would your counts be wrong if you were using threads to handle requests, they would also vary depending on which process handled the … Read more
it doesn’t need to be public but it is essentially a Map where you can only get for the current Thread as key and when the value hasn’t been set yet it is initialized automatically this implements thread local storage so you can have “public static” variables without needing to synchronize on them
Your question lacks the details but I think you are looking for a throttling mechanism. There are plenty of the existing libraries that can do the heavy lifting for you, e.g. https://nugetmusthaves.com/Tag/throttling You can also implement it yourself. The implementation details will be different for sync and async code. https://blog.briandrupieski.com/throttling-asynchronous-methods-in-csharp