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Detecting interruptions in C


 
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Top Forums Programming Detecting interruptions in C
# 8  
Old 12-06-2007
Quote:
Originally Posted by Ashrentum
I think should be a basic routine of an OS.
What is supposed to be a basic routine of an OS?

Kernels handle interrupt controllers and manage the handling of interrupt services.

Disk device drivers handle disk interrupts, mouse drivers handle mouse interrupts, keyboard drivers handle keyboard interrupts.

But these are at device driver level.

The idea of a kernel is that it isolates you from machine specifics and provides a logical interface with security and separation from other processes.

If you want to write a user level program you have to work within those limitations.

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poll_mouse(3alleg4)						  Allegro manual					       poll_mouse(3alleg4)

NAME
poll_mouse - Polls the mouse. Allegro game programming library. SYNOPSIS
#include <allegro.h> int poll_mouse(); DESCRIPTION
Wherever possible, Allegro will read the mouse input asynchronously (ie. from inside an interrupt handler), but on some platforms that may not be possible, in which case you must call this routine at regular intervals to update the mouse state variables. To help you test your mouse polling code even if you are programming on a platform that doesn't require it, after the first time that you call this function Allegro will switch into polling mode, so from that point onwards you will have to call this routine in order to get any mouse input at all, regardless of whether the current driver actually needs to be polled or not. RETURN VALUE
Returns zero on success, or a negative number on failure (ie. no mouse driver installed). SEE ALSO
mouse_needs_poll(3alleg4), install_mouse(3alleg4), mouse_x(3alleg4), exlights(3alleg4), exmouse(3alleg4), exshade(3alleg4), exs- pline(3alleg4), extrans(3alleg4) Allegro version 4.4.2 poll_mouse(3alleg4)

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