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// -*- C++ -*-
/**
* @file EC_Timeout_Generator.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*
* Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and
* other members of the DOC group. More details can be found in:
*
* http://doc.ece.uci.edu/~coryan/EC/index.html
*/
#ifndef TAO_EC_TIMEOUT_GENERATOR_H
#define TAO_EC_TIMEOUT_GENERATOR_H
#include /**/ "ace/pre.h"
#include "ace/Event_Handler.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include /**/ "orbsvcs/Event/event_serv_export.h"
#include "orbsvcs/Event/EC_Timeout_Filter.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
class TAO_EC_QOS_Info;
/**
* @class TAO_EC_Timeout_Generator
*
* @brief Define the interface for the generators of timeout events.
*
* The Event Channel can use several strategies to dispatch
* timers, for instance, it can use the ORB reactor or a pool of
* reactors running at different priorities or a pool of
* Thread_Timer_Queue_Adapters running at different priorities
* also.
* This class is the abstract base class to abstract this
* strategies.
*/
class TAO_RTEvent_Serv_Export TAO_EC_Timeout_Generator
{
public:
/// destructor
virtual ~TAO_EC_Timeout_Generator (void);
/// Activate any internal threads.
virtual void activate (void) = 0;
/// Deactivate any internal threads, clients can destroy the object
/// after calling this method.
virtual void shutdown (void) = 0;
/// Add a timer at the given priority, returns the timer ID.
virtual int schedule_timer (TAO_EC_Timeout_Filter* filter,
const ACE_Time_Value& delta,
const ACE_Time_Value& interval) = 0;
/// Cancel a timer at the given priority.
virtual int cancel_timer (const TAO_EC_QOS_Info& info,
int id) = 0;
};
// ****************************************************************
/**
* @class TAO_EC_Timeout_Adapter
*
* @brief Adapt the EC_Filter interface as an Event_Handler.
*
* ACE timer queues (including the reactor) use Event_Handlers to
* dispatch events, but we want to receive them in EC_Filters,
* this class is and adaptor for that purpose.
*/
class TAO_RTEvent_Serv_Export TAO_EC_Timeout_Adapter : public ACE_Event_Handler
{
public:
/// Default construction.
TAO_EC_Timeout_Adapter (void);
private:
/// Casts <act> to EC_Filter and dispatches an event to it.
virtual int handle_timeout (const ACE_Time_Value &tv,
const void *act);
};
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "orbsvcs/Event/EC_Timeout_Generator.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_EC_TIMEOUT_GENERATOR_H */
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