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diff --git a/ksokoban/Queue.h b/ksokoban/Queue.h
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+/*
+ *  ksokoban - a Sokoban game for KDE
+ *  Copyright (C) 1998  Anders Widell  <d95-awi@nada.kth.se>
+ *
+ *  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
+ */
+
+#ifndef QUEUE_H
+#define QUEUE_H
+
+#include <assert.h>
+
+template <class Type, int SizePow2>
+class Queue {
+private:
+  Type *queue_;
+  long   head_, tail_;
+
+public:
+  void clear() { head_ = tail_ = 0; }
+  bool empty() { return head_ == tail_; }
+  bool full() { return ((tail_ + 1) & ((1l<<SizePow2)-1)) == head_; }
+
+  Queue() {
+    queue_ = new Type[1l << SizePow2];
+    clear();
+  }
+  ~Queue() { delete [] queue_; }
+
+  void enqueue(Type _x) {
+    assert(!full());
+    queue_[tail_] = _x;
+    tail_ = (tail_ + 1) & ((1l<<SizePow2)-1);
+  }
+
+  Type dequeue() {
+    assert(!empty());
+    Type x = queue_[head_];
+    head_ = (head_ + 1) & ((1l<<SizePow2)-1);
+    return x;
+  }
+};
+
+#endif  /* QUEUE_H */