New Queue class, from RTL branch

svn-id: r34237

common/list.h

@@ -209,6 +209,11 @@ public:
 				++i;
 	}
 
+	void pop_front() {
+		iterator i = begin();
+		i = erase(i);
+	}
+
 
 	List<t_T> &operator=(const List<t_T> &list) {
 		if (this != &list) {

common/queue.h

@@ -0,0 +1,71 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/branches/gsoc2008-rtl/common/stack.h $
+ * $Id$
+ */
+
+#ifndef COMMON_QUEUE_H
+#define COMMON_QUEUE_H
+
+#include "common/scummsys.h"
+#include "common/list.h"
+
+namespace Common {
+
+/**
+ * Variable size Queue class, implemented using our List class.
+ */
+template<class T>
+class Queue {
+protected:
+	List<T>		_queue;
+public:
+	Queue<T>() {}
+	Queue<T>(const List<T> &queueContent) : _queue(queueContent) {}
+
+	bool empty() const {
+		return _queue.empty();
+	}
+	void clear() {
+		_queue.clear();
+	}
+	void push(const T &x) {
+		_queue.push_back(x);
+	}
+	T back() const {
+		return _queue.reverse_begin().operator*();
+	}
+	T front() const {
+		return _queue.begin().operator*();
+	}
+	T pop() {
+		T tmp = front();
+		_queue.pop_front();
+		return tmp;
+	}
+	int size() const {
+		return _queue.size();
+	}
+};
+
+} // End of namespace Common
+
+#endif