interrupt

I'm using the GCC compiler and C++ and I want to make a timer that triggers an interruption when the countdown is 0. Any Ideas? Thanks in advance. EDIT Thanks to Adam, I know how to do it. Now. What about multiple timers running in parallel? Actually, these timers are for something very basic. In NCURSES, I have a list of things. When I press a key, one of the things will change colors for 5 seconds. If I press another key, another thing in the list will do the same. It's like emphasize strings depending on the user input. Is there a simpler way to do that? One way to do it is to use the alarm

I'm refining some code which simulated a context-switching scheduler on x86 Windows systems. The program compiles on Windows XP (Edit: probably not Windows 7) with some ancient Borland C compiler, and is being ported to being MSVC compilable. At one point, the code installs ISRs through these unavailable functions in dos.h : void (*)() getvect(int) void setvect(int, void (*)()); Specifically, the code installs an ISR for a (cyclic) timer interrupt. The calls are: tick_isr_old = getvect(0x08); setvect(0xF2, tick_isr_old); setvect(0x08, (void interrupt (*)(void)) tick_isr); setvect(0xF1, (void

I need to call some DOS interrupts (Services) from a C/C++ program, I tried the following inline asm code: (Read a character) int main() { asm( "movb $0x01, %ah;" "int $0x21" ); system("PAUSE"); } But it did not work ! I would like to know what have i done wrong here ! Also if there is another way to call dos interrupts ! Thank You ! You can only use DOS interrupts from DOS programs, so to make this work, you'd need a really ancient C++ compiler like Visual C++ 1.0 or 1.5, or Turbo C++/Borland C++ up through something like 4.5 or possibly 5.0. Then you'd have to fix your assembly code -- what

Is there any other way to disable interrupts for the duration of only one instruction in x86 than using the CLI instruction? Yes, loading SS with a MOV will inhibit external interrupts for the next instruction. This is what the instruction set reference says: Loading the SS register with a MOV instruction inhibits all interrupts until after the execution of the next instruction. This operation allows a stack pointer to be loaded into the ESP register with the next instruction (MOV ESP, stack-pointer value) before an interrupt occurs. This code snippet does the trick: pushf pop ax and ax, FDFFh

In my Android application user can fill database with imported data, then perform predefined, complex SQL query. With some data pattern, query will take very long (minutes and more on HTC Hero), while common usage will not exceed 10-15 seconds. Is there any way to cancel pending SQLite query on Android? Timeout would be as good as well, partial results are not required. I'm performing query within AsyncTask.doInBackground() I know best way is optimize query or change app logic, but in this case results depends on user knowledge anyway, so I'd like to help those who enter troublesome pattern.

I'm using LuaJ to run user-created Lua scripts in Java. However, running a Lua script that never returns causes the Java thread to freeze. This also renders the thread uninterruptible. I run the Lua script with: JsePlatform.standardGlobals().loadFile("badscript.lua").call(); badscript.lua contains while true do end . I'd like to be able to automatically terminate scripts which are stuck in unyielding loops and also allow users to manually terminate their Lua scripts while they are running. I've read about debug.sethook and pcall , though I'm not sure how I'd properly use them for my purposes.