interrupt

I'm working on a simple kernel and I've been trying to implement a keyboard interrupt handler to get rid of port polling. I've been using QEMU in -kernel mode (to reduce compile time, because generating the iso using grub-mkrescue takes quite some time) and it worked just fine, but when I wanted to switch to -cdrom mode it suddenly started crashing. I had no idea why. Eventually I've realized that when it boots from an iso it also runs a GRUB bootloader before booting the kernel itself. I've figured out GRUB probably switches the processor into protected mode and that causes the problem . the

Off late i am working on multithreading in java. Want to understand if a Thread is in BLOCKED state why it cant be interrupted? And why the thread can be interrupted only if it is in WAIT state? Basically, why do we need two Thread states one which can be interrupted and the other which cant be interrupted? This question might be very basic but, I am trying to understand things rather than just remembering them. One assumes that you mean cause the thread to stop its current operation and throw an InterruptedException ? A thread interrupt in Java is just a flag. You can call interrupt() just

There are many threads on SO about interrupting reading the system.in but what I am looking for here is some kind of advice as to how to best code what I am trying to achieve. I have a getlogin() method that needs to do the following: ask a user to input the desired login environnement details, if after 6 seconds user have not input a valid value ("live" or "test") then set userlogin variable to "test" and return it to the caller. I have taken the following approach for the getlogin() implementation: launch two threads which do the following: thread1 creates a scanner object then calls scanner

I am asking this because I am trying to implement interrupts in my toy kernel. So, I know that when an interrupt occurs, the CPU pushes various bits of information onto the stack. However, everywhere I search online shows different information in different order being pushed. I also know that if the interrupt occurred in user mode (Ring 3), the CPU must switch to kernel mode (Ring 0) before it can execute the ISR. I think it has something to do with the TSS and ss and esp , however I am not sure. I have read various different explanations all over the internet and have not found any uniformity

I want to sort an array, using Web Workers. But this array might receive new values over time, while the worker is still performing the sort function. So my question is, how can I "stop" the sorting computation on the worker after receiving the new item, so it can perform the sort on the array with that item, while still keeping the sorting that was already made? Example: let worker = new Worker('worker.js'); let list = [10,1,5,2,14,3]; worker.postMessage({ list }); setInterval(() => worker.postMessage({ num: SOME_RANDOM_NUM, list }), 100); worker.onmessage = event => { list = event.data.list;

Hi I am fairly new to python and I am trying to create a program that starts a thread that after five seconds will interrupt the input () function and print the message “Done!”. Currently it only prints “Done!” after input is given. Even after five seconds has passed, the user must enter input before the message "Done!" is displayed. How can I get the thread to interrupt the input() function? import time import threading def fiveSec(): time.sleep(5) print('Done!') def main(): t = threading.Thread(target = fiveSec) t.daemond = True t.start() input('::>') if __name__ == '__main__': main() (Using

Say we have a web worker referring to a file called "worker.js". We use the worker to execute a function in "worker.js" that does some lengthy operation. We call post the respective message to the worker and proceed in the main thread. However, before the worker has finished doing its initial work, the main thread posts another message to it. My question: Will the worker continue with our time-taking function and only process the newly posted message once finished or will it interrupt its current operation until the new one has been completed? I've tried out the following code in Google Chrome

In the book Thinking in Java it is written that Thread.interrupt() cannot interrupt a thread which is trying to acquire a synchronized lock, I want to know why? A blocking operation can be interrupted only if it is declared to throw InterruptedException . Clearly, a synchronized block does not declare it, therefore it is impossible to interrupt a thread while it is waiting to acquire a lock. Alternatively you can use an explicit lock and call Lock.lockInterruptibly() . The book is wrong, unless it is only referring to the synchronized keyword. Object.wait() throws InterruptedException . 来源：