serenity/Kernel/i8253.h

#pragma once

#include <AK/Types.h>

#define TICKS_PER_SECOND          1000

namespace PIT {

void initialize();
dword ticks_this_second();
dword seconds_since_boot();

}
Import the "gerbert" kernel I worked on earlier this year. It's a lot crappier than I remembered it. It's gonna need a lot of work. 2018-10-16 11:01:38 +02:00			`#pragma once`

Implement event loop timers. GObjects can now register a timer with the GEventLoop. This will eventually cause GTimerEvents to be dispatched to the GObject. This needed a few supporting changes in the kernel: - The PIT now ticks 1000 times/sec. - select() now supports an arbitrary timeout. - gettimeofday() now returns something in the tv_usec field. With these changes, the clock window in guitest2 finally ticks on its own. 2019-02-01 03:50:06 +01:00			`#include <AK/Types.h>`

			`#define TICKS_PER_SECOND 1000`
Import the "gerbert" kernel I worked on earlier this year. It's a lot crappier than I remembered it. It's gonna need a lot of work. 2018-10-16 11:01:38 +02:00
			`namespace PIT {`

			`void initialize();`
Kernel: Do timekeeping manually instead of asking the RTC all the time. This introduces a tiny amount of timer drift which I will have to fix somehow eventually, but it's a huge improvement in timing consistency as we no longer suddenly jump from e.g 10:45:49.123 to 10:45:50.000. 2019-03-25 02:06:57 +01:00			`dword ticks_this_second();`
			`dword seconds_since_boot();`
Import the "gerbert" kernel I worked on earlier this year. It's a lot crappier than I remembered it. It's gonna need a lot of work. 2018-10-16 11:01:38 +02:00
			`}`