Source code of Windows XP (NT5)
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
title "NtGetTickCount";++;; Copyright (c) 1989 Microsoft Corporation;; Module Name:;; tickcnt.asm;; Abstract:;;; This module contains the implementation for the fast NtGetTickCount service;;; Author:;; Mark Lucovsky (markl) 19-Oct-1996;; Environment:;; Kernel mode.;; Revision History:;;;--.386p; .xlistinclude ks386.incinclude callconv.inc ; calling convention macros; .list
extrn _KeTickCount:DWORDextrn _ExpTickCountMultiplier:DWORD
_TEXT SEGMENT DWORD PUBLIC 'CODE' ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
page ,132
;++;; Routine Description:;; This function returns number of milliseconds since the system; booted. This function is designed to support the Win32 GetTicKCount; API.;; Arguments:;; NONE;; Return Value:;; Returns the number of milliseconds that have transpired since boot;;--
cPublicProc _NtGetTickCount, 0cPublicFpo 0, 0
mov eax,dword ptr [_KeTickCount] mul dword ptr [_ExpTickCountMultiplier] shrd eax,edx,24 ; compute resultant tick count
stdRET _NtGetTickCountstdENDP _NtGetTickCount
_TEXT ends end
|
