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// $Id$
// ==========================================================================
//
// = LIBRARY
// orbsvcs
//
// = FILENAME
// Notify_ID_Pool_T.h
//
// = DESCRIPTION
// A class to generate ID's and recycle them.
//
// = AUTHOR
// Pradeep Gore <pradeep@cs.wustl.edu>
//
// ==========================================================================
#ifndef TAO_NOTIFY_ID_POOL_T_H
#include "ace/pre.h"
#define TAO_NOTIFY_ID_POOL_T_H
#include "ace/OS.h"
#include "ace/Containers_T.h"
#include "orbsvcs/CosNotifyChannelAdminS.h"
template <class ID_TYPE>
class TAO_Notify_ID_Pool
{
// = TITLE
// ID_Pool
//
// = DESCRIPTION
// This class is used by factories that need to associate id's with the
// objects that they create.When the objects are destroyed, these id's
// can be reused, hence the need to recycle.
// Using <get> several times in succession gives back the same id.
// Only when <next> is called, the current id is moved to the active_list_
// The very first id generated is always 0.The condition is necessary to
// support ids for default objects that require an id of 0.
//
public:
TAO_Notify_ID_Pool (void);
// Constructor.
~TAO_Notify_ID_Pool ();
// Destructor.
ID_TYPE get (void);
// Returns the current id.
void put (ID_TYPE id);
// Put an ID back so that it might be recycled.
void next (void);
// Generates the next id.
// The current id is moved to the active_list_.
protected:
ID_TYPE id_;
// The next available id.
ID_TYPE max_id_;
// This is the last id circulating in the list.When there are no more id's
// in the resuse list, we increment this value to get a new id.
ACE_Unbounded_Set <ID_TYPE> active_list_;
// List of ids currently in use by clients of this class.
ACE_Unbounded_Set <ID_TYPE> reuse_list_;
// List of ids returned to this list and eligible to be used again.
};
template <class ID_TYPE, class ID_TYPE_SEQ>
class TAO_Notify_ID_Pool_Ex : public TAO_Notify_ID_Pool <ID_TYPE>
{
// = TITLE
// TAO_Notify_ID_Pool_Ex
//
// = DESCRIPTION
// Extends the TAO_Notify_ID_Pool with a method to convert the active_list
// into a sequence type.
//
public:
TAO_Notify_ID_Pool_Ex (void);
~TAO_Notify_ID_Pool_Ex ();
ID_TYPE_SEQ* get_sequence (CORBA::Environment &ACE_TRY_ENV);
// Get a list of all ids in use.
// Essentially converts the <active_list_> to a Sequence.
};
#if defined (__ACE_INLINE__)
#include "Notify_ID_Pool_T.i"
#endif /* __ACE_INLINE__ */
#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
#include "Notify_ID_Pool_T.cpp"
#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
#pragma implementation ("Notify_ID_Pool_T.cpp")
#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
#include "ace/post.h"
#endif /* TAO_NOTIFY_ID_POOL_T_H */
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