interrupt

I have a method which, conceptually, looks something like: Object f(Object o1) { Object o2 = longProcess1(o1); Object o3 = longProcess2(o2); return longProcess3(o3); } Where the processes themselves might also be compound: Object longProcess1(Object o1) { Object o2 = longSubProcess1(o1); return longSubProcess2(o2); } And so forth, with the different processes potentially sitting in different modules. Most of the processes are long because they are computationally expensive, not IO-bound. So far so good, but now I want f as a whole to be interruptable. The recommended Java way to do that is to

I could not find a proper answer for the following questions even in some well written kernel books: They are saying that an ISR can't sleep because its not possible to reschedule an ISR as it is not connected with any process , so what happens when a higher priority interrupt preempt the executing one? the interrupted ISR will not rescheduled(execute) again ? if yes how & who will do that work? many time we will disable interrupt (eg: 1.In critical region 2. When a fast interrupt is executing it will disable all the interrupt in the current processor) , so what will happen for the interrupts

Let us suppose that I have a thread that consumes items produced by another thread. Its run method is as follows, with inQueue being a BlockingQueue boolean shutdown = false; while (!shutdown) { try { WorkItem w = inQueue.take(); w.consume(); } catch (InterruptedException e) { shutdown = true; } } Furthermore, a different thread will signal that there are no more work items by interrupting this running thread. Will take() throw an interrupted exception if it does not need to block to retrieve the next work item. i.e. if the producer signals that it is done filling the work queue, is it

I have a ruby script below which infinitely prints numbers from 1 onward. How can I make the script stop its infinite execution through an interrupt in the terminal like 'Ctrl+C' or key 'q'? a = 0 while( a ) puts a a += 1 # the code should quit if an interrupt of a character is given end Through every iteration, no user input should be asked. I think you will have to check the exit condition in a separate thread: # check for exit condition Thread.new do loop do exit if gets.chomp == 'q' end end a = 0 loop do a += 1 puts a sleep 1 end BTW, you will have to enter q<Enter> to exit, as that's how

I want to know which threads processes device interrupts. What happens when there is a interrupt when a user mode thread is running? Also do other user threads get a chance to run when the system is processing an interrupt? Kindly suggest me some reference material describing how interrupts are handled by windows. Device interrupts themselves are (usually) processed by whatever thread had the CPU that took the interrupt, but in a ring 0 and at a different protection level. This limits some of the actions an interrupt handler can take, because most of the time the current thread will not be

How do interrupts work on the Intel 8080? I have searched Google and in Intel's official documentation (197X), and I've found only a little description about this. I need a detailed explanation about it, to emulate this CPU. The 8080 has an Interrupt line (pin 14). All peripherals are wired to this pin, usually in a "wire-OR" configuration (meaning interrupt request outputs are open-collector and the interrupt pin is pulled high with a resistor). Internally, the processor has an Interrupt Enable bit. Two instructions, EI and DI, set and clear this bit. The entire interrupt system is thus

As known there are two approach to avoid some overheads of hardware interrupts in highload networks, when there are too many hardware interrupts, that switching to them takes too much time. It is very important for performance and choosing approach of programm style. NAPI (New API) - Does not use hardware interrupts , and polls the Ethernet-device every certain period of time. The Linux kernel uses the interrupt-driven mode by default and only switches to polling mode when the flow of incoming packets exceeds a certain threshold. http://en.wikipedia.org/wiki/New_API The kernel can periodically

On x86 (either 64-bit or 32-bit) Linux -- for example: void signal_handler(int) { // want to know where the program is interrupted ... } int main() { ... signal(SIGALRM, signal_handler); alarm(5); ... printf(...); <------- at this point, we trigger signal_handler ... } In signal_handler, how can we know we are interrupted at printf in main()? Use sigaction with SA_SIGINFO set in sa_flags. Prototype code: #define _GNU_SOURCE 1 /* To pick up REG_RIP */ #include <stdio.h> #include <signal.h> #include <assert.h> static void handler(int signo, siginfo_t *info, void *context) { const ucontext_t *con