Initial commit

engines/ultima/ultima4/events/timed_event_mgr.cpp

@@ -0,0 +1,133 @@
+/* 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 "ultima/ultima4/events/timed_event_mgr.h"
+#include "ultima/ultima4/gfx/screen.h"
+#include "common/system.h"
+
+namespace Ultima {
+namespace Ultima4 {
+
+TimedEventMgr::TimedEventMgr(int baseInterval) :
+		_baseInterval(baseInterval), _lastTickTime(0), _locked(false) {
+}
+
+void TimedEventMgr::poll() {
+	uint32 time = g_system->getMillis();
+	if (time >= (_lastTickTime + _baseInterval)) {
+		_lastTickTime = time;
+		tick();
+
+		g_screen->update();
+	}
+}
+
+void TimedEventMgr::reset(uint interval) {
+	_baseInterval = interval;
+}
+
+/*-------------------------------------------------------------------*/
+
+TimedEvent::TimedEvent(TimedEvent::Callback cb, int i, void *d) :
+	_callback(cb),
+	_data(d),
+	_interval(i),
+	_current(0) {
+}
+
+TimedEvent::Callback TimedEvent::getCallback() const {
+	return _callback;
+}
+
+void *TimedEvent::getData() {
+	return _data;
+}
+
+void TimedEvent::tick() {
+	if (++_current >= _interval) {
+		(*_callback)(_data);
+		_current = 0;
+	}
+}
+
+bool TimedEventMgr::isLocked() const {
+	return _locked;
+}
+
+void TimedEventMgr::add(TimedEvent::Callback theCallback, int interval, void *data) {
+	_events.push_back(new TimedEvent(theCallback, interval, data));
+}
+
+TimedEventMgr::List::iterator TimedEventMgr::remove(List::iterator i) {
+	if (isLocked()) {
+		_deferredRemovals.push_back(*i);
+		return i;
+	} else {
+		delete *i;
+		return _events.erase(i);
+	}
+}
+
+void TimedEventMgr::remove(TimedEvent *event) {
+	List::iterator i;
+	for (i = _events.begin(); i != _events.end(); i++) {
+		if ((*i) == event) {
+			remove(i);
+			break;
+		}
+	}
+}
+
+void TimedEventMgr::remove(TimedEvent::Callback theCallback, void *data) {
+	List::iterator i;
+	for (i = _events.begin(); i != _events.end(); i++) {
+		if ((*i)->getCallback() == theCallback && (*i)->getData() == data) {
+			remove(i);
+			break;
+		}
+	}
+}
+
+void TimedEventMgr::tick() {
+	List::iterator i;
+	lock();
+
+	for (i = _events.begin(); i != _events.end(); i++)
+		(*i)->tick();
+
+	unlock();
+
+	// Remove events that have been deferred for removal
+	for (i = _deferredRemovals.begin(); i != _deferredRemovals.end(); i++)
+		_events.remove(*i);
+}
+
+void TimedEventMgr::lock() {
+	_locked = true;
+}
+
+void TimedEventMgr::unlock() {
+	_locked = false;
+}
+
+
+} // End of namespace Ultima4
+} // End of namespace Ultima