1 files changed, 65 insertions, 0 deletions
diff --git a/ACE/ace/Hashable.h b/ACE/ace/Hashable.h
new file mode 100644
index 00000000000..1a4a7011c28
--- /dev/null
+++ b/ACE/ace/Hashable.h
@@ -0,0 +1,65 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file   Hashable.h
+ *
+ *  $Id$
+ *
+ *  @author Doug Schmidt
+ */
+//=============================================================================
+
+#ifndef ACE_HASHABLE_H
+#define ACE_HASHABLE_H
+
+#include /**/ "ace/pre.h"
+
+#include "ace/ACE_export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class ACE_Hashable
+ *
+ * @brief ACE_Hashable
+ */
+class ACE_Export ACE_Hashable
+{
+public:
+
+  /// Destructor.
+  virtual ~ACE_Hashable (void);
+
+  /// Computes and returns hash value.  This "caches" the hash value to
+  /// improve performance.
+  virtual unsigned long hash (void) const;
+
+protected:
+  /// Protected constructor.
+  ACE_Hashable (void);
+
+  /// This is the method that actually performs the non-cached hash
+  /// computation.
+  virtual unsigned long hash_i (void) const = 0;
+
+protected:
+
+  /// Pre-computed hash-value.
+  mutable unsigned long hash_value_;
+
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (__ACE_INLINE__)
+#include "ace/Hashable.inl"
+#endif /* __ACE_INLINE __ */
+
+#include /**/ "ace/post.h"
+
+#endif /*ACE_HASHABLE_H*/