Event loop refers to an infinite cycle of actions which is used for processing data based on callbacks and messages.
An event loop watches for I/O and timer state changes. It queues functions while waiting for unavailable resources, then dispatches them when resources are available.
What's the basic structure of a event loop system in C++11? How are the key elements (such as message queue, message dispatcher, signal) implemented? For example, do I still need a std::queue, a std::mutex and a std::condition_variable as…
On the Apple II BASIC in the 1980s, you would use "HGR", to get to a screen, "HCOLOR" would set a color, and "HPLOT" would plot points. You could also manipulate the screen byte data, and you wouldn't have to hand off program control to any event…
It is well known that Nodejs is handling all events in the background loop. But how can I monitor all the active events and is it potential risk of out of memory or dead lock?
I'd like to know how to update and render game objects when using Qt. E.g. with a typical game you'd have an event loop, but Qt just has exec(). What is the correct way to update and render game objects using Qt? How do I do things like get the time…
I have the following class in a FastAPI application:
import asyncio
import logging
from multiprocessing import Lock, Process
from .production_status import Job as ProductionStatusJob
class JobScheduler:
loop = None
logger =…
Im using QtSDK 4.7.3
I am doing this in (void test()):
mgr = new QNetworkAccessManager();
reply = mgr->get(QNetworkRequest(QUrl("http://developer.qt.nokia.com/fileNotExisting.txt")));
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)),
…
Firs of all, I apologize for my English.
I am learning python asyncio module and I get confused at some point. I learn from the doc that the main purpose of the event loop is to schedule coroutines for running, open newtwork I/O... A running…
I am confused by the following paragraph of the Node.js documentation.
setImmediate() vs setTimeout()
... The order in which the timers are executed will vary depending on the context in which they are called. If both are called from within the…
I'm trying to use match case when checking the value in event loop. However break not only break the match case, but break the event loop too.
This is the code
while True:
# Some code stuff here
if event == "#PassSign":
# Some code…
I know that the callback function of setTimeout, setInterval, setImmediate api is queued in macro task queue.
But, I'm not sure about addEventListener.
Is the callback function of addEventListener is queued in macro task queue?
Check please :D
I've seen that I can repeat a function with python every x seconds by using a event loop library in this post:
import sched, time
s = sched.scheduler(time.time, time.sleep)
def do_something(sc):
print("Doing stuff...")
# do your stuff
…
I have a class with various methods. I have a method in that class something like :
class MyClass:
async def master_method(self):
tasks = [self.sub_method() for _ in range(10)]
results = await asyncio.gather(*tasks)
async def…
I use this method to launch a few dozen (less than thousand) of calls of do_it at different timings in the future:
import threading
timers = []
while True:
for i in range(20):
t = threading.Timer(i * 0.010, do_it, [i]) # I pass the…
What exactly are SelectorEventLoop and ProactorEventLoop? How are they different?
I was testing the use of asyncio and aiohttp in python on Windows, then got an error RuntimeError: Event loop is closed.
Looked up and found a workaround, but I did…
Last week I started learning Javascript back-end with nodejs. While working with async functions, I wanted to understand this in all aspect and started doing research on this subject.
I found Jake Archibald's presentation in jsconf and I tried to…
