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// -*- C++ -*-
//=============================================================================
/**
* @file CSD_TP_Queue_Visitor.h
*
* $Id$
*
* @author Tim Bradley <bradley_t@ociweb.com>
*/
//=============================================================================
#ifndef TAO_CSD_TP_QUEUE_VISITOR_H
#define TAO_CSD_TP_QUEUE_VISITOR_H
#include /**/ "ace/pre.h"
#include "tao/CSD_ThreadPool/CSD_TP_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/Versioned_Namespace.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
namespace CSD
{
class TP_Request;
/**
* @class TP_Queue_Visitor
*
* @brief Base class for vistors of the elements in the TP_Queue.
*
* Provides a way to perform thread-safe iteration over the
* TP_Request objects contained within a TP_Queue object.
*
* This also provides a means to encapsulate each distinct algorithm
* within a distinct subclass of TP_Queue_Visitor.
*
*/
class TAO_CSD_TP_Export TP_Queue_Visitor
{
public:
/// Virtual Destructor.
virtual ~TP_Queue_Visitor();
/// Returns true to continue visitation. Return false to stop
/// visitation. Sets the remove_flag to true if the request should
/// be removed from the queue as a result of the visit. Leaves the
/// remove_flag alone otherwise.
virtual bool visit_request(TP_Request* request, bool& remove_flag) = 0;
protected:
/// Default Constructor.
TP_Queue_Visitor();
};
}
}
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/CSD_ThreadPool/CSD_TP_Queue_Visitor.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_CSD_TP_QUEUE_VISITOR_H */
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