multithreading

问题 Creating a background thread in C# in the normal way - Thread t = new Thread(....); t.IsBackground = true; t.Start(); etc etc Wanting to call CancelSynchronousIO from the main thread to cancel a blocking IO call on the background thread. Don't know how to get a thread handle in the form of an IntPtr to pass to the function: [DllImport("kernel32.dll", SetLastError=true)] static extern bool CancelSynchronousIo(IntPtr threadHandle); There seems to be various ways of getting a thread ID, but not

问题 After searching on Stack Overflow questions and some googling, I still not getting it. I'm aware that you can check if a single thread is running with "Thread.isAlive()" method, but I want to check if a particular "FooThread" is still running between all running threads from current process, and if not, call the method that starts it. //somewhere in the code, on another Project/DLL inside solution private void FooThreadCaller() { Action act = () => fooFunction(); Thread t = new Thread(new

问题 I'm trying to create two threads that each have their own asyncio event loop. I've tried the following code but it doesn't seem to work: import asyncio from threading import Thread def hello(thread_name): print('hello from thread {}!'.format(thread_name)) event_loop_a = asyncio.new_event_loop() event_loop_b = asyncio.new_event_loop() def callback_a(): asyncio.set_event_loop(event_loop_a) asyncio.get_event_loop().call_soon_threadsafe(lambda: hello('a')) def callback_b(): asyncio.set_event_loop

问题 I'm using Apple's concurrency core data debugger. -com.apple.CoreData.ConcurrencyDebug 1 From time to time I got __Multithreading_Violation_AllThatIsLeftToUsIsHonor__ , even I'm almost sure threading is not violated. This is part of code where exception occurs (code is part of protocol that extends NSManagedObject): public static func find(arrayBy predicate: NSPredicate, sort: [NSSortDescriptor] = [], limit: Int? = nil) -> [Self] { let fetchRequest = NSFetchRequest<Self>(entityName: "\(Self

问题 I have a question here regarding doing calculations on a python dictionary----in this case, the dictionary has millions of keys, and the lists are similarly long. There seems to be disagreement whether one could use parallelization here, so I'll ask the question here more explicitly. Here is the original question: Optimizing parsing of massive python dictionary, multi-threading This is a toy (small) python dictionary: example_dict1 = {'key1':[367, 30, 847, 482, 887, 654, 347, 504, 413, 821],

问题 I have a question here regarding doing calculations on a python dictionary----in this case, the dictionary has millions of keys, and the lists are similarly long. There seems to be disagreement whether one could use parallelization here, so I'll ask the question here more explicitly. Here is the original question: Optimizing parsing of massive python dictionary, multi-threading This is a toy (small) python dictionary: example_dict1 = {'key1':[367, 30, 847, 482, 887, 654, 347, 504, 413, 821],

问题 tl;dr: "I would like to read an SslStream continuously in C# but I can't figure out the best way." Some background: I'm getting stock data from a stream that I would like to present in a web interface. The stream sends a heartbeat every 5 seconds and you can also subscribe/unsubscribe to stock prices and news etc. https://api.test.nordnet.se/next/2/api-docs/docs/feeds Currently I'm using SslTcpClient from MSDN example to read and write to the stream and it works OK. https://msdn.microsoft.com

问题 Here is a snippet of code: def display(): threading.Timer(1,display).start() print("Number") display() For this code I want to ask the following things: Every second new thread spawns, is that right? Every second the last thread dies because the function executes completely so the older thread dies, is that right? If not then what is happening? 回答1: Timer derives from Thread , so yes: many threads are started. Threads die when their invoked functions return (or throw) whether or not you call

问题 Here is a snippet of code: def display(): threading.Timer(1,display).start() print("Number") display() For this code I want to ask the following things: Every second new thread spawns, is that right? Every second the last thread dies because the function executes completely so the older thread dies, is that right? If not then what is happening? 回答1: Timer derives from Thread , so yes: many threads are started. Threads die when their invoked functions return (or throw) whether or not you call

问题 When the following piece of code is getting executed I am getting exceptions in a random manner. byte[][] loremIpsumContentArray = new byte[64][]; for (int i = 0; i < loremIpsumContentArray.length; i++) { random.nextBytes(loremIpsumContentArray[i] = new byte[CONTENT_SIZE]); } AtomicBoolean aBoolean = new AtomicBoolean(true); List<Long> resultList = IntStream.range(0, 64* 2) .parallel() .mapToObj(i -> getResult(i, aBoolean, repositoryPath, loremIpsumContentArray )) .collect(Collectors.toList()