interrupt

问题 I have a project. That is a simple game , "Falling Blocks" . The game area is considered as a grid, which has 20x20 size. There will be falling blocks from top of the screen and a hero at the bottom, who will shoot the blocks. The aim of game is shooting blocks before they reach the bottom line. He always stays at the bottom line . Whenever the user press space button of the keyboard I will generate a bullet, and the hero moves on the bottom line with the right and left arrow keys. I do not

问题 This question already has answers here : How to stop uninterruptible threads in Java (6 answers) Closed 6 years ago . It is a widely known fact that one shall not stop running processes using Thread.stop(). Usually the manuals and tutorials suggest using Thread.interrupt() or some boolean variable instead, and checking from inside the code for that interrupt or variable. But if I have a library method which takes a very long time to execute sometimes, and I want to give user an ability to

问题 I've written a web crawler that I'd like to be able to stop via the keyboard. I don't want the program to die when I interrupt it; it needs to flush its data to disk first. I also don't want to catch KeyboardInterruptedException , because the persistent data could be in an inconsistent state. My current solution is to define a signal handler that catches SIGINT and sets a flag; each iteration of the main loop checks this flag before processing the next url. However, I've found that if the

问题 What are irq domains, i read kernel documentation (https://www.kernel.org/doc/Documentation/IRQ-domain.txt) they say: The number of interrupt controllers registered as unique irqchips show a rising tendency: for example subdrivers of different kinds such as GPIO controllers avoid reimplementing identical callback mechanisms as the IRQ core system by modeling their interrupt handlers as irqchips, i.e. in effect cascading interrupt controllers. How GPIO controller can be called as interrupt

问题 I am studying Intel Protected Mode. I found that Call Gate, Interrupt Gate, Trap Gate are almost the same. In fact, besides that Call Gate has the fields for parameter counter, and that these 3 gates have different type fields, they are identical in all other fields. As to their functions, they are all used to transfer code control into some procedure within some code segment. I am wondering, since these 3 gates all contain the information needed for the call across privilege boundaries. Why

问题 Is there any way to disable all irq from Cortex M3 MCU except one ? My issue is that I have a system running several kinds of irq with various priority levels and I want to disable all irq except one in a particular state. I know I can disable all irq by using "__disable_irq()" instruction but I can't enable one irq after calling this instruction if I didn't call "__enable_irq()" before. Thanks for your help, Regards 回答1: Use the BASEPRI register to disable all interrupts below the specified

问题 I'm considering to use C++0x threads in my application instead of Boost threads. However, I'm not sure how to reimplement what I have with standard C++0x threads since they don't seem to have an interrupt() method. My current setup is: a master thread that manages work; several worker threads that carry out master's commands. Workers call wait() on at least two different condition variables. Master has a "timed out" state: in this case it tells all workers to stop and give whatever result

问题 I want to know when my AVAudioRecorder is inaccessible (e.g when music starts playing). As audioRecorderEndInterruption will be deprecated with iOS 9 I am focusing on AVAudioSession 's interruption notification (but neither is working as expected). The issue is that the interruption notification is never called if the app was and remains in the foreground when the interruption occurs. E.g: The user starts and stops playing music without moving the application into the background. To detect

问题 A teammate made the following claim: " Thread.interrupt() is inherently broken, and should (almost) never be used". I am trying to understand why this is the case. Is it a known best practice never to use Thread.interrupt() ? Can you provide evidence why it is broken / buggy, and should not be used for writing robust multithreaded code? Note - I am not interested in this question if it's "pretty" from a design preservative. My question is - is it buggy? 回答1: Short version: Is it a known best

问题 I have used a static global variable and a static volatile variable in file scope, both are updated by an ISR and a main loop and main loop checks the value of the variable. here during optimization neither the global variable nor the volatile variable are optimized. So instead of using a volatile variable a global variable solves the problem. So is it good to use global variable instead of volatile? Any specific reason to use static volatile?? Any example program would be appreciable. Thanks