interrupt

How to interrupt java.util.Scanner nextLine call

由 限于喜欢 提交于 2019-11-27 15:13:22
I am using a multi threaded environment were one Thread is constantly listening for user input by repeatedly calling scanner.nextLine() . To end the application, this runloop is stopped by another thread, but the listening thread won't stop until a last user input was made (due to the blocking nature of nextLine() ). Closing the stream seems not to be an option since I am reading from System.in , which returns an InputStream that is not closable. Is there a way to interrupt the blocking of scanner, so that it will return? thanks This article describes an approach to avoiding blocking when

How to add a peridic timer callback in a linux kernel module

由 让人想犯罪 __ 提交于 2019-11-27 15:10:23
问题 I am working on a Linux kernel module that registers a callback for interrupts that come from a custom-made board and puts the received data in a queue behind a char device interface to be processed by an application. This module needs to constantly monitor and measure the interrupts and data that comes from the board even if no interrupt comes from the board, so it has another callback that triggers according to time. Current implementation uses RTC interrupt as a constant timer source. I

I don't understand how to use Interrupt 21, AH=0ah

由 ▼魔方 西西 提交于 2019-11-27 09:29:19
My information is coming from here . The assignment asks for a program that reads in no more than 20 characters, converts those characters to upper case, and then prints the input as capitals. I have no idea how to access the input from int21/AH=0ah. I really can't ask a more precise question unless I understand what is linked above. Can someone explain? Also, I'm using TASM if that makes any difference. Also, I'm testing this on freedos. UPDATE1: Alright, thanks to your help, I believe I understand how the interrupt needs to be set up and behaves. Setup: I have to designate a ds:dx where I

Polling or Interrupt based method

由 荒凉一梦 提交于 2019-11-27 09:25:17
问题 When should one use polling method and when should one use interrupt based method ? Are there scenarios in which both can be used ? 回答1: If the event of interest is: Asynchronous Urgent Infrequent then an interrupt based handler would make sense. If the event of interest is: Synchronous (i.e. you know when to expect it within a small window) Not Urgent (i.e. a slow polling interval has no ill effects) Frequent (i.e. majority of your polling cycles create a 'hit') then polling might be a

prevent linux thread from being interrupted by scheduler

由 别说谁变了你拦得住时间么 提交于 2019-11-27 08:40:52
How do you tell the thread scheduler in linux to not interrupt your thread for any reason? I am programming in user mode. Does simply locking a mutex acomplish this? I want to prevent other threads in my process from being scheduled when a certain function is executing. They would block and I would be wasting cpu cycles with context switches. I want any thread executing the function to be able to finish executing without interruption even if the threads' timeslice is exceeded. How do you tell the thread scheduler in linux to not interrupt your thread for any reason? Can't really be done, you

Methods that Clear the Thread.interrupt() flag

由 房东的猫 提交于 2019-11-27 07:39:21
I have recently inherited a large Java Application that has almost no Thread safety in it. What I'm currently working on is getting all of the Threads to correctly handle being interrupted instead of using the very bad Thread.stop() . Part of the problem has been that I do not know every method call out there that clears the interrupt flag. Currently I know that the following will clear the interrupt flag: Thread.interrupted() Thread.sleep(long) Thread.join() Thread.join(long) Object.wait() Object.wait(long) What else am I missing? Thank you Part of the problem has been that I do not know

I want my thread to handle interruption, but I can't catch InterruptedException because it is a checked exception

由 心已入冬 提交于 2019-11-27 07:25:14
问题 I have a thread in Java which calls t.interrupt(); making t (a different thread) be interrupted. I want the "t" thread to then catch an InterruptedException but Eclipse won't let me put an InterruptedException in saying it's not thrown in the try body. How can I get the InterruptedException to be called? Am I using t.interrupt() wrong? 回答1: While the other answers are correct, a fuller explanation is appropriate. A thread can be safely interrupted (in the general sense of the word) only at

after catching “InterruptedException”, why “Thread.currentThread().isInterrupted()”'s value is false?

由 与世无争的帅哥 提交于 2019-11-27 07:12:44
问题 as the title. public static void main(String[] args) throws InterruptedException { Thread thread = new Thread(new Runnable() { @Override public void run() { try { TimeUnit.SECONDS.sleep(2); } catch (InterruptedException e) { e.printStackTrace(); System.out.println(Thread.currentThread().isInterrupted()); //print false, who reset the interrupt? } } }); thread.start(); TimeUnit.SECONDS.sleep(1); thread.interrupt(); } after catching "InterruptedException", why "Thread.currentThread()

Interrupts, Instruction Pointer, and Instruction Queue in 8086

由 青春壹個敷衍的年華 提交于 2019-11-27 07:12:24
问题 Suppose an external interrupt request is made to 8086. Processor will handle the interrupt after completing the current instruction being executed (if any). Before handling of the interrupt, the state of the program will also be saved (PSW flag, registers etc.) by pushing data onto the stack segment. Now, most tutorials/documents describe that instruction pointer is also pushed onto the stack segment, which is okay because it was pointing to the next byte of instruction in the code segment

Cannot transmit every characters through UART

由 白昼怎懂夜的黑 提交于 2019-11-27 07:07:06
问题 I am using stm32f0 MCU. I would like to transmit every single byte received from the uart out of the uart. I am enabling an interrupt on every byte received from uart. My code is quite simple. uint8_t Rx_data[5]; //Interrupt callback routine void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) { if (huart->Instance == USART1) //current UART { HAL_UART_Transmit(&huart1, &Rx_data[0], 1, 100); HAL_UART_Receive_IT(&huart1, Rx_data, 1); //activate UART receive interrupt every time on receiving
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