coroutine

问题 If I correctly understand how goroutines work on top of system threads - they run from queue one by one. But does it mean that every goroutine loads\unloads it's context to CPU? If yes what's difference between system threads and goroutines? The most significant problem is time-cost of context-switching. Is it correct? What mechanism lays under detecting which data was requested by which goroutine? For example: I am sending request to DB from goroutine A and doesn't wait for response and at

问题 I'm getting an error message and I'm not exactly sure how to solve. I'm trying to start a countdown after a short period of idleness that then kicks off a second countdown that is paired with a visual warning. As soon as the coroutine kicks on I'm getting this error: Coroutine couldn't be started because the the game object '_CountdownTimer' is inactive! UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator) CountdownTimer:StartPreCountTimer() (at Assets/_Components/_Scripts/CountdownTimer.cs

问题 My python daemon process stops working when its asyncio run_forever loop listens to websocket calls that originate from a separate run_until_complete asyncio coroutine (or thread) but runs within the same process (PID). More specifically, I code a localhost server in Python 3.4.3 that updates via the webbrowser function an HTML web page in my firefox webbrowser. I then try to capture button presses elicited in a temporary popup window overlay and relay the associated action strings via

问题 I'm trying to make an API that will collect responses from several other API's and combine the results into one response. I want to sent the get requests asynchronously so that it runs faster, but even though I'm using coroutines and yielding, my code still seems to be making each request one at a time. Wondering if maybe it's because I'm using the requests library instead of tornado's AsyncHTTPClient, or because I'm calling self.path_get inside of a loop, or because I'm storing results in an

问题 Consider the following code in kotlin. val scope = CoroutineScope(Dispatchers.Main + Job()) scope.launch { println("inside coroutine") } println("outside coroutine") We create a coroutine in the Main(UI) thread and there is some code after the coroutine. I know it doesn´t make much sense to do that in real code, but it´s just a theoretical question. Considering that the coroutine runs in the Main thread, why println("outside coroutine") is ALWAYS executed first? I would have expected that

问题 In the example below, how can I get FinishFirst() to complete first before running DoLast(), while still retaining the 'public void StartPage()' signature? I'm trying to avoid making "StartPage()" return an IEnumerator as that would force me to change it in the interface. It would be great if my Interface for StartPage() supported both IEnumerator and Void without needing to implement both. public void StartPage() { print("in StartPage()"); StartCoroutine(FinishFirst(5.0f)); DoLast(); print(

问题 I was looking at http://www.dabeaz.com/coroutines/, which I am finding very interesting, but in an example there is a behavior I do not understand. In the bogus.py example, reported here # bogus.py # # Bogus example of a generator that produces and receives values def countdown(n): print "Counting down from", n while n >= 0: newvalue = (yield n) # If a new value got sent in, reset n with it if newvalue is not None: n = newvalue else: n -= 1 # The holy grail countdown c = countdown(5) for x in

问题 From a comment by Jim Fasarakis Hilliard: Generators: def functions that contain one or more yield expressions. Generators are used as data producers (they yield values). I can understand that. Generator-based coroutine: A generator ( def + yield ) that is wrapped by types.coroutine. You need to wrap it in types.coroutine if you need it to be considered a coroutine object. Generator-based coroutines are used as consumers (you .send values to them or to a sub-generator they yield from ). What

问题 I am using lua 5.3 from my C/C++ game to allow certain parts of its behavior to be scripted. From the C++ program, every frame I call the lua function main in the following manner: lua_getfield(VMState, LUA_GLOBALSINDEX, "main"); int result = lua_pcall(VMState, 0, 0, 0); I expect the script to define a function called main , which does a bunch of stuff. For example, I can have a script that does something like this: local f = function() draw_something({visible = true, x = 0, y = 0}) end main

问题 I am trying to write a request handler to help me send request in async mode. It prompt when I close the python terminal with Ctrl+D or exit() It shows sys:1: RuntimeWarning: coroutine was never awaited import asyncio import urllib.request import json class RequestHandler: def SendPostRequest(method="post",url=None, JsonFormatData={}): # Encode JSON data =json.dumps(JsonFormatData).encode('utf8') # Config Request Header req = urllib.request.Request(url) req.add_header('Content-Type',