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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 1.0 (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()
- {
- ULONG count;
-
- 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;
- }
-