Initial commit

engines/tetraedge/te/te_real_timer.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include "common/system.h"
+#include "tetraedge/te/te_real_timer.h"
+
+namespace Tetraedge {
+
+TeRealTimer::TeRealTimer() : _startTime(0), _paused(false), _maxTimeSeen(0), _startTime2(0) {
+	pause();
+	_pausedTime = 0;
+}
+
+static uint64 getUsecs() {
+	return (uint64)g_system->getMillis() * 1000;
+}
+
+uint64 TeRealTimer::getTimeFromStart() {
+	uint64 timeNow;
+	if (_paused) {
+		timeNow = _pausedTime;
+	} else {
+		timeNow = getUsecs();
+		if (timeNow < _maxTimeSeen)
+			timeNow = _maxTimeSeen;
+		_maxTimeSeen = timeNow;
+	}
+
+	return timeNow - _startTime;
+}
+
+void TeRealTimer::pause() {
+	if (!_paused) {
+		uint64 timeNow = getUsecs();
+		if (timeNow < _maxTimeSeen)
+			timeNow = _maxTimeSeen;
+		_maxTimeSeen = timeNow;
+		_pausedTime = timeNow;
+		_paused = true;
+	}
+}
+
+void TeRealTimer::start() {
+	if (_paused) {
+		uint64 timeNow = getUsecs();
+		if (timeNow < _maxTimeSeen)
+			timeNow = _maxTimeSeen;
+		timeNow += (_startTime - _pausedTime);
+		_startTime = timeNow;
+		_startTime2 = timeNow;
+		_maxTimeSeen = timeNow;
+		_paused = false;
+	}
+}
+
+void TeRealTimer::stop() {
+	pause();
+	_startTime = 0;
+	_startTime2 = 0;
+	_pausedTime = 0;
+}
+
+uint64 TeRealTimer::systemTime() {
+	return getUsecs();
+}
+
+uint64 TeRealTimer::monotonicSystemTime() {
+	uint64 timeNow = getUsecs();
+	if (_maxTimeSeen < timeNow)
+		_maxTimeSeen = timeNow;
+	return _maxTimeSeen;
+}
+
+uint64 TeRealTimer::time_() {
+	return systemTime();
+}
+
+/* Time elapsed from the start */
+uint64 TeRealTimer::timeElapsed() {
+	uint64 timeNow = getUsecs();
+	if (_maxTimeSeen < timeNow)
+		_maxTimeSeen = timeNow;
+	_startTime2 = _maxTimeSeen;
+	uint64 elapsed = _maxTimeSeen - _startTime;
+	return elapsed;
+}
+
+uint64 TeRealTimer::timeFromLastTimeElapsed() {
+	uint64 timeNow = getUsecs();
+	if (_maxTimeSeen < timeNow)
+		_maxTimeSeen = timeNow;
+	uint64 elapsed = _maxTimeSeen - _startTime2;
+	return elapsed;
+}
+
+} // end namespace Tetraedge