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/* -*- C++ -*- */
/**
* @file EC_Dispatching.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_DISPATCHING_H
#define TAO_EC_DISPATCHING_H
#include "ace/pre.h"
#include "orbsvcs/RtecEventCommC.h"
#include "event_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
class TAO_EC_QOS_Info;
class TAO_EC_ProxyPushSupplier;
/**
* @class TAO_EC_Dispatching
*
* @brief Abstract base class for the dispatching strategies.
*
* The dispatching strategies.
* The EC may be configured with different dispatching strategies,
* for instance, it can use a pool of threads to dispatch the
* events, or a set of queues with threads at different priorities
* for each queue or can simply push the event to the consumer in
* FIFO order.
*/
class TAO_RTEvent_Export TAO_EC_Dispatching
{
public:
/// destructor...
virtual ~TAO_EC_Dispatching (void);
/// Initialize all the data structures, activate any internal threads,
/// etc.
virtual void activate (void) = 0;
/**
* Deactivate any internal threads and cleanup internal data
* structures, it should only return once the threads have finished
* their jobs.
*/
virtual void shutdown (void) = 0;
/**
* The consumer represented by <proxy> should receive <event>.
* It can use the information in <qos_info> to determine the event
* priority (among other things).
*/
virtual void push (TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
const RtecEventComm::EventSet &event,
TAO_EC_QOS_Info &qos_info
TAO_ENV_ARG_DECL_WITH_DEFAULTS) = 0;
virtual void push_nocopy (TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet &event,
TAO_EC_QOS_Info &qos_info
TAO_ENV_ARG_DECL_WITH_DEFAULTS) = 0;
};
// ****************************************************************
/**
* @class TAO_EC_Reactive_Dispatching
*
* @brief Dispatch using the caller thread.
*
* The events are dispatched in FIFO ordering, using the invoking
* thread to push the event to the consumer.
*/
class TAO_RTEvent_Export TAO_EC_Reactive_Dispatching : public TAO_EC_Dispatching
{
public:
/// The scheduler is used to find the range of priorities and similar
/// info.
TAO_EC_Reactive_Dispatching (void);
// = The EC_Dispatching methods.
virtual void activate (void);
virtual void shutdown (void);
virtual void push (TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
const RtecEventComm::EventSet &event,
TAO_EC_QOS_Info &qos_info
TAO_ENV_ARG_DECL_WITH_DEFAULTS);
virtual void push_nocopy (TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet &event,
TAO_EC_QOS_Info &qos_info
TAO_ENV_ARG_DECL_WITH_DEFAULTS);
};
#if defined (__ACE_INLINE__)
#include "EC_Dispatching.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* TAO_EC_DISPATCHING_H */
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