Initial commit

engines/bagel/spacebar/boflib/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 "bagel/spacebar/boflib/timer.h"
+#include "bagel/bagel.h"
+#include "bagel/boflib/log.h"
+
+namespace Bagel {
+namespace SpaceBar {
+
+bool CBofTimer::_bModified = false;
+CBofTimer *CBofTimer::_pTimerList = nullptr;
+
+WindowTimer::WindowTimer(uint32 interval, uint32 id, BofCallback callback) :
+	_interval(interval), _id(id), _callback(callback) {
+	_lastExpiryTime = g_system->getMillis();
+}
+
+
+CBofTimer::CBofTimer() {
+	_lLastTime = 0;
+	_nID = 0;
+	_nInterval = 0;
+	_pCallBack = nullptr;
+	_lUserInfo = 0;
+	_bActive = false;
+
+	// Another item for the list
+	if (_pTimerList == nullptr) {
+		_pTimerList = this;
+
+	} else {
+		_pTimerList->addToTail(this);
+	}
+
+	// Creating a new timer object modifies the timer list
+	_bModified = true;
+}
+
+
+CBofTimer::CBofTimer(uint32 nID, uint32 nInterval, void *lUserInfo, BofCallback pCallBack) {
+	_lLastTime = 0;
+	_nID = nID;
+	_nInterval = nInterval;
+	_pCallBack = pCallBack;
+	_lUserInfo = lUserInfo;
+	_bActive = false;
+
+	// Another item for the list
+	if (_pTimerList == nullptr) {
+		_pTimerList = this;
+
+	} else {
+		_pTimerList->addToTail(this);
+	}
+
+	// Creating a new timer object modifies the timer list
+	_bModified = true;
+}
+
+
+CBofTimer::~CBofTimer() {
+	assert(isValidObject(this));
+
+	if (_pTimerList == this) {
+		_pTimerList = (CBofTimer *)_pTimerList->getNext();
+	}
+
+	// Removing a timer object modifies the timer list
+	_bModified = true;
+}
+
+
+void CBofTimer::handleTimers() {
+	CBofTimer *pTimer = _pTimerList;
+	while (pTimer != nullptr) {
+		if (pTimer->isActive()) {
+			uint32 lCurrentTime = g_system->getMillis();
+
+			if ((uint32)(lCurrentTime - pTimer->_lLastTime) >= pTimer->_nInterval) {
+				// Remember for next time
+				pTimer->_lLastTime = lCurrentTime;
+
+				if (pTimer->_pCallBack != nullptr) {
+					// Execute call back
+					(*pTimer->_pCallBack)(pTimer->_nID, pTimer->_lUserInfo);
+
+					// If callback modifies the timer list, then we must start over
+					if (_bModified) {
+						pTimer = _pTimerList;
+						continue;
+					}
+
+				} else {
+					// Otherwise, something is wrong
+					logWarning(buildString("Timer without a callback: %d", pTimer->_nID));
+				}
+			}
+		}
+
+		pTimer = (CBofTimer *)pTimer->getNext();
+	}
+}
+
+} // namespace SpaceBar
+} // namespace Bagel