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// -*- 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*/
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