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diff --git a/ACE/ace/Priority_Reactor.h b/ACE/ace/Priority_Reactor.h
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    Priority_Reactor.h
+ *
+ *  $Id$
+ *
+ *  @author Carlos O'Ryan <coryan@uci.edu>
+ */
+//=============================================================================
+
+#ifndef ACE_PRIORITY_REACTOR_H
+#define ACE_PRIORITY_REACTOR_H
+#include /**/ "ace/pre.h"
+
+#include "ace/ACE_export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ace/Select_Reactor.h"
+#include "ace/Unbounded_Queue.h"
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class ACE_Priority_Reactor
+ *
+ * @brief Implements priority based dispatching.
+ *
+ * This class refines the dispatching mechanism for the
+ * Select_Reactor by taking advantage of the priority method on
+ * ACE_Event_Handler.
+ */
+class ACE_Export ACE_Priority_Reactor : public ACE_Select_Reactor
+{
+public:
+  // = Initialization and termination methods.
+
+  /// Initialize <ACE_Priority_Reactor> with the default size.
+  ACE_Priority_Reactor (ACE_Sig_Handler * = 0,
+                        ACE_Timer_Queue * = 0);
+
+  /// Initialize <ACE_Priority_Reactor> with size <size>.
+  ACE_Priority_Reactor (size_t size,
+                        int restart = 0,
+                        ACE_Sig_Handler * = 0,
+                        ACE_Timer_Queue * = 0);
+
+  /// Close down the select_reactor and release all of its resources.
+  virtual ~ACE_Priority_Reactor (void);
+
+  /// Dump the state of an object.
+  void dump (void) const;
+
+  /// Declare the dynamic allocation hooks.
+  ACE_ALLOC_HOOK_DECLARE;
+
+protected:
+  // = Dispatching methods.
+
+  /// We simply override this function to implement the priority
+  /// dispatching.
+  virtual int dispatch_io_set (int number_of_active_handles,
+                               int &number_dispatched,
+                               int mask,
+                               ACE_Handle_Set &dispatch_mask,
+                               ACE_Handle_Set &ready_mask,
+                               ACE_EH_PTMF callback);
+
+private:
+  /// A small helper to initialize the bucket.
+  void init_bucket (void);
+
+  /// Build the bucket from the given dispatch_mask
+  void build_bucket (ACE_Handle_Set& dispatch_mask,
+                     int &min_priority,
+                     int &max_priority);
+
+  /// There is a queue per-priority, which simply holds the
+  /// Event_Handlers until we know who goes first.
+  typedef ACE_Unbounded_Queue<ACE_Event_Tuple> QUEUE;
+  QUEUE** bucket_;
+
+  /// The queues themselves use this allocator to minimize dynamic
+  /// memory usage.
+  ACE_Allocator* tuple_allocator_;
+
+  /// Deny access since member-wise won't work...
+  ACE_Priority_Reactor (const ACE_Priority_Reactor &);
+  ACE_Priority_Reactor &operator = (const ACE_Priority_Reactor &);
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#include /**/ "ace/post.h"
+#endif /* ACE_PRIORITY_REACTOR_H */