JCL Help:ReadTimeStampCounter

 JCL Help: ReadTimeStampCounter Function

JCL Functions

► JclSysInfo.pas Functions

[+] JclSysInfo.pas Functions

SystemInformationRoutines.Hardware

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Summary

Reads the time stamp counter.

Pascal

 function ReadTimeStampCounter: Int64;

Return Value

The current value of the time stamp counter.

Description

The ReadTimeStampCounter function reads and returns the current value of the time stamp counter. The time-stamp counter counts CPU clocks from the time the processor is reset, where it is initialized to an unknown count. This is a 64 bit count and therefore it can accumulate counts for almost 2500 years (based on a 200MHz processor) before a rollover occurs. You may want to consider inlining this instruction as opposed to calling this function. If you do, the resulting 64 bit integer containing the count is returned in the combination EDX:EAX.

About

Unit

JclSysInfo

Donator

Azret Botash

Notes

This instruction is only available on Pentium (and higher) processors.

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