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diff --git a/dep/src/zthread/Scheduling.h b/dep/src/zthread/Scheduling.h
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+++ b/dep/src/zthread/Scheduling.h
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+/*
+ * Copyright (c) 2005, Eric Crahen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __ZTSCHEDULING_H__
+#define __ZTSCHEDULING_H__
+
+#include "ThreadImpl.h"
+
+#include <algorithm>
+#include <functional>
+#include <deque>
+#include <utility>
+
+namespace ZThread {
+
+  /**
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-16T20:01:18-0400>
+   * @version 2.2.0
+   * @class fifo_list
+   */
+  class fifo_list : public std::deque<ThreadImpl*> {
+  public:
+
+    void insert(const value_type& val) { push_back(val); }
+
+  };
+
+  /**
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-16T20:01:18-0400>
+   * @version 2.2.0
+   * @struct priority_order
+   */
+  struct priority_order : public std::binary_function<ThreadImpl*, ThreadImpl*, bool> {
+   
+    std::less<const ThreadImpl*> id;
+
+    bool operator()(const ThreadImpl* t0, const ThreadImpl* t1) const {
+
+      if(t0->getPriority() > t1->getPriority())
+        return true;
+
+      else if (t0->getPriority() < t1->getPriority())
+        return false;
+
+      return id(t0, t1);
+
+    }
+  
+  };
+
+
+  /**
+   * @author Eric Crahen <http://www.code-foo.com>
+   * @date <2003-07-16T20:01:18-0400>
+   * @version 2.2.0
+   * @class priority_list
+   */
+  class priority_list : public std::deque<ThreadImpl*> { 
+
+    priority_order comp;
+
+  public:
+
+    void insert(const value_type& val) { 
+
+      push_back(val); 
+      std::sort(begin(), end(), comp);
+
+    }
+
+  };
+
+} // namespace ZThread
+
+#endif // __ZTSCHEDULING_H__