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engines/illusions/updatefunctions.h

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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/>.
+ *
+ */
+
+#ifndef ILLUSIONS_UPDATEFUNCTIONS_H
+#define ILLUSIONS_UPDATEFUNCTIONS_H
+
+#include "common/func.h"
+#include "common/list.h"
+
+namespace Illusions {
+
+enum {
+	kUFNext      = 1,  // Run next update function
+	kUFTerminate = 2   // Terminate update function
+};
+
+typedef Common::Functor1<uint, int> UpdateFunctionCallback;
+
+class UpdateFunction {
+public:
+	int _priority;
+	uint32 _sceneId;
+	uint _flags;
+	UpdateFunctionCallback *_callback;
+	UpdateFunction() : _priority(0), _sceneId(0), _flags(0), _callback(0) {}
+	~UpdateFunction() { delete _callback; }
+	void terminate() { _flags |= 1; }
+	int run() { return (*_callback)(_flags); }
+};
+
+class UpdateFunctions {
+public:
+	UpdateFunctions();
+	~UpdateFunctions();
+	void add(int priority, uint32 sceneId, UpdateFunctionCallback *callback);
+	void update();
+	void terminateByScene(uint32 sceneId);
+protected:
+	typedef Common::List<UpdateFunction*> UpdateFunctionList;
+	typedef UpdateFunctionList::iterator UpdateFunctionListIterator;
+
+	struct FindInsertionPosition : public Common::UnaryFunction<const UpdateFunction*, bool> {
+		int _priority;
+		FindInsertionPosition(int priority) : _priority(priority) {}
+		bool operator()(const UpdateFunction *updateFunction) const {
+			return updateFunction->_priority > _priority;
+		}
+	};
+
+	Common::List<UpdateFunction*> _updateFunctions;
+	uint32 _lastTimerUpdateTime;
+};
+
+} // End of namespace Illusions
+
+#endif // ILLUSIONS_UPDATEFUNCTIONS_H