1 /****************************************************************************
3 * Ultra Long Period Timer
5 * ========================================================================
7 * The contents of this file are subject to the SciTech MGL Public
8 * License Version 1.0 (the "License"); you may not use this file
9 * except in compliance with the License. You may obtain a copy of
10 * the License at http://www.scitechsoft.com/mgl-license.txt
12 * Software distributed under the License is distributed on an
13 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14 * implied. See the License for the specific language governing
15 * rights and limitations under the License.
17 * The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
19 * The Initial Developer of the Original Code is SciTech Software, Inc.
20 * All Rights Reserved.
22 * ========================================================================
27 * Description: MSDOS specific code for the CPU detection module.
29 ****************************************************************************/
31 /*----------------------------- Implementation ----------------------------*/
33 /* External timing function */
35 void __ZTimerInit(void);
37 /****************************************************************************
39 Do nothing for DOS because we don't have thread priorities.
40 ****************************************************************************/
41 #define SetMaxThreadPriority() 0
43 /****************************************************************************
45 Do nothing for DOS because we don't have thread priorities.
46 ****************************************************************************/
47 #define RestoreThreadPriority(i) (void)(i)
49 /****************************************************************************
51 Initialise the counter and return the frequency of the counter.
52 ****************************************************************************/
53 static void GetCounterFrequency(
54 CPU_largeInteger *freq)
59 ULZTimerResolution(&resolution);
60 freq->low = (ulong)(10000000000.0 / resolution);
64 /****************************************************************************
66 Read the counter and return the counter value.
67 ****************************************************************************/
68 #define GetCounter(t) \
70 (t)->low = ULZReadTime() * 10000L; \