summaryrefslogtreecommitdiffstats
path: root/board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c')
-rw-r--r--board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c b/board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c
new file mode 100644
index 0000000000..318929a2c0
--- /dev/null
+++ b/board/MAI/bios_emulator/scitech/src/pm/win32/ztimer.c
@@ -0,0 +1,136 @@
+/****************************************************************************
+*
+* Ultra Long Period Timer
+*
+* ========================================================================
+*
+* The contents of this file are subject to the SciTech MGL Public
+* License Version 1.0 (the "License"); you may not use this file
+* except in compliance with the License. You may obtain a copy of
+* the License at http://www.scitechsoft.com/mgl-license.txt
+*
+* Software distributed under the License is distributed on an
+* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+* implied. See the License for the specific language governing
+* rights and limitations under the License.
+*
+* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
+*
+* The Initial Developer of the Original Code is SciTech Software, Inc.
+* All Rights Reserved.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Win32
+*
+* Description: OS specific implementation for the Zen Timer functions.
+*
+****************************************************************************/
+
+/*---------------------------- Global variables ---------------------------*/
+
+static CPU_largeInteger countFreq;
+static ibool havePerformanceCounter;
+static ulong start,finish;
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+REMARKS:
+Initialise the Zen Timer module internals.
+****************************************************************************/
+void __ZTimerInit(void)
+{
+#ifdef NO_ASSEMBLER
+ havePerformanceCounter = false;
+#else
+ havePerformanceCounter = QueryPerformanceFrequency((LARGE_INTEGER*)&countFreq);
+#endif
+}
+
+/****************************************************************************
+REMARKS:
+Start the Zen Timer counting.
+****************************************************************************/
+static void __LZTimerOn(
+ LZTimerObject *tm)
+{
+ if (havePerformanceCounter)
+ QueryPerformanceCounter((LARGE_INTEGER*)&tm->start);
+ else
+ tm->start.low = timeGetTime();
+}
+
+/****************************************************************************
+REMARKS:
+Compute the lap time since the timer was started.
+****************************************************************************/
+static ulong __LZTimerLap(
+ LZTimerObject *tm)
+{
+ CPU_largeInteger tmLap,tmCount;
+
+ if (havePerformanceCounter) {
+ QueryPerformanceCounter((LARGE_INTEGER*)&tmLap);
+ _CPU_diffTime64(&tm->start,&tmLap,&tmCount);
+ return _CPU_calcMicroSec(&tmCount,countFreq.low);
+ }
+ else {
+ tmLap.low = timeGetTime();
+ return (tmLap.low - tm->start.low) * 1000L;
+ }
+}
+
+/****************************************************************************
+REMARKS:
+Stop the Zen Timer counting.
+****************************************************************************/
+static void __LZTimerOff(
+ LZTimerObject *tm)
+{
+ if (havePerformanceCounter)
+ QueryPerformanceCounter((LARGE_INTEGER*)&tm->end);
+ else
+ tm->end.low = timeGetTime();
+}
+
+/****************************************************************************
+REMARKS:
+Compute the elapsed time in microseconds between start and end timings.
+****************************************************************************/
+static ulong __LZTimerCount(
+ LZTimerObject *tm)
+{
+ CPU_largeInteger tmCount;
+
+ if (havePerformanceCounter) {
+ _CPU_diffTime64(&tm->start,&tm->end,&tmCount);
+ return _CPU_calcMicroSec(&tmCount,countFreq.low);
+ }
+ else
+ return (tm->end.low - tm->start.low) * 1000L;
+}
+
+/****************************************************************************
+REMARKS:
+Define the resolution of the long period timer as microseconds per timer tick.
+****************************************************************************/
+#define ULZTIMER_RESOLUTION 1000
+
+/****************************************************************************
+REMARKS:
+Read the Long Period timer from the OS
+****************************************************************************/
+static ulong __ULZReadTime(void)
+{ return timeGetTime(); }
+
+/****************************************************************************
+REMARKS:
+Compute the elapsed time from the BIOS timer tick. Note that we check to see
+whether a midnight boundary has passed, and if so adjust the finish time to
+account for this. We cannot detect if more that one midnight boundary has
+passed, so if this happens we will be generating erronous results.
+****************************************************************************/
+ulong __ULZElapsedTime(ulong start,ulong finish)
+{ return finish - start; }
OpenPOWER on IntegriCloud