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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* OS/2 interval timers
*
*/
#include "primpl.h"
ULONG _os2_ticksPerSec = -1;
PRIntn _os2_bitShift = 0;
PRInt32 _os2_highMask = 0;
PR_IMPLEMENT(void)
_PR_MD_INTERVAL_INIT()
{
if (DosTmrQueryFreq(&_os2_ticksPerSec) == NO_ERROR)
{
while(_os2_ticksPerSec > PR_INTERVAL_MAX) {
_os2_ticksPerSec >>= 1;
_os2_bitShift++;
_os2_highMask = (_os2_highMask << 1)+1;
}
}
else
_os2_ticksPerSec = -1;
PR_ASSERT(_os2_ticksPerSec > PR_INTERVAL_MIN && _os2_ticksPerSec < PR_INTERVAL_MAX);
}
PR_IMPLEMENT(PRIntervalTime)
_PR_MD_GET_INTERVAL()
{
QWORD count;
/* Sadly; nspr requires the interval to range from 1000 ticks per second
* to only 100000 ticks per second; Counter is too high
* resolution...
*/
if (DosTmrQueryTime(&count) == NO_ERROR) {
PRInt32 top = count.ulHi & _os2_highMask;
top = top << (32 - _os2_bitShift);
count.ulLo = count.ulLo >> _os2_bitShift;
count.ulHi = count.ulLo + top;
return (PRUint32)count.ulLo;
}
else{
ULONG msCount = PR_FAILURE;
DosQuerySysInfo(QSV_MS_COUNT, QSV_MS_COUNT, &msCount, sizeof(msCount));
return msCount;
}
}
PR_IMPLEMENT(PRIntervalTime)
_PR_MD_INTERVAL_PER_SEC()
{
if(_os2_ticksPerSec != -1)
return _os2_ticksPerSec;
else
return 1000;
}
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