Re: AbsoluteTime & IOHIKeyboard's

Re: AbsoluteTime & IOHIKeyboard's _keyboardEventAction

Subject: Re: AbsoluteTime & IOHIKeyboard's _keyboardEventAction

From: Matt Burnett <email@hidden>

Date: Tue, 25 Mar 2008 05:25:00 -0500

Delivered-to: email@hidden

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Also this doesnt seem to work. This should show me the up time assuming the machine was started on 1970/1/1 00:00:00. It says it has been up for 10 hours when the uptime command says over 1 day. What exactly am i doing wrong?

Code:

AbsoluteTime keyTimeAbs = UpTime();

Nanoseconds keyTimeNano = AbsoluteToNanoseconds(keyTimeAbs);

double seconds = ((double) UnsignedWideToUInt64( keyTimeNano )) * 1e-9;

NSDate *keyTimeDate = [NSDate dateWithTimeIntervalSince1970:seconds];

NSLog(@"Key event date: %@",keyTimeDate);

Output:

2008-03-25 05:23:47.625 timeTest[5051:10b] Key event date: 1970-01-01 10:17:25 -0600

Uptime:

5:24 up 1 day, 4:57, 3 users, load averages: 0.56 0.55 0.53

On Mar 25, 2008, at 4:49 AM, Brian Bergstrand wrote:

AbsoluteTime is CPU specific. You have to use the mach clock_* functions to convert the interval to nano seconds. The epoch for the converted value will be the standard UNIX epoch (1970/1/1 00:00:00).

On Mar 25, 2008, at 11:35 AM, Matt Burnett wrote:

I have a KEXT which hooks in to IOHIKeyboard's _keyboardEventAction. One of the variables it provides me is time of the event in the form of AbsoluteTime. What date or event (power on?) is this value counting up from? Thanks.

Brian Bergstrand
<http://www.bergstrand.org/brian/> PGP Key ID: 0xB6C7B6A2

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References:
	>AbsoluteTime & IOHIKeyboard's _keyboardEventAction (From: Matt Burnett <email@hidden>)
	>Re: AbsoluteTime & IOHIKeyboard's _keyboardEventAction (From: Brian Bergstrand <email@hidden>)