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// -*- C++ -*-
/**
* @file ESF_RefCount_Guard.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*
* http://doc.ece.uci.edu/~coryan/EC/index.html
*/
#ifndef TAO_ESF_REFCOUNT_GUARD_H
#define TAO_ESF_REFCOUNT_GUARD_H
#include "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/Versioned_Namespace.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class TAO_ESF_RefCount_Guard
*
* @brief Reference count based guard.
*
* A common idiom used on event services is to increment a
* reference count before starting a long running operation.
* The system can then execute the operation without any risk of
* having the underlying object destroyed. The advantage of using
* a reference count is that no mutex or lock needs to be held
* while the operation is beign executed.
*/
template<class T>
class TAO_ESF_RefCount_Guard
{
public:
/// Constructor
TAO_ESF_RefCount_Guard (T &refcount);
/// Destructor
~TAO_ESF_RefCount_Guard (void);
protected:
/// The reference count
T &refcount_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ESF_RefCount_Guard.i"
#endif /* __ACE_INLINE__ */
#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
#include "ESF_RefCount_Guard.cpp"
#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
#pragma implementation ("ESF_RefCount_Guard.cpp")
#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
#endif /* TAO_ESF_REFCOUNT_GUARD_H */
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