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/* -*- C++ -*- */
/**
* @file EC_MT_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_MT_DISPATCHING_H
#define TAO_EC_MT_DISPATCHING_H
#include /**/ "ace/pre.h"
#include "EC_Dispatching.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "EC_Dispatching_Task.h"
/**
* @class TAO_EC_MT_Dispatching
*
* @brief Dispatching strategy that minimizes mt inversion.
*
* This strategy uses a single queue, serviced by one or more
* threads. It's main purpose is to decouple the suppliers from
* the client execution time, specially in the collocated case.
*/
class TAO_RTEvent_Export TAO_EC_MT_Dispatching : public TAO_EC_Dispatching
{
public:
/// Constructor
/// It will create @a nthreads servicing threads...
TAO_EC_MT_Dispatching (int nthreads,
int thread_creation_flags,
int thread_priority,
int force_activate);
// = 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
ACE_ENV_ARG_DECL);
virtual void push_nocopy (TAO_EC_ProxyPushSupplier* proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
private:
/// Use our own thread manager.
ACE_Thread_Manager thread_manager_;
/// The number of active tasks
int nthreads_;
/// The flags (THR_BOUND, THR_NEW_LWP, etc.) used to create the
/// dispatching threads.
int thread_creation_flags_;
/// The priority of the dispatching threads.
int thread_priority_;
/// If activation at the requested priority fails then we fallback on
/// the defaults for thread activation.
int force_activate_;
/// The dispatching task
TAO_EC_Dispatching_Task task_;
/// Synchronize access to internal data
TAO_SYNCH_MUTEX lock_;
/// Are the threads running?
int active_;
};
#include /**/ "ace/post.h"
#endif /* TAO_EC_MT_DISPATCHING_H */
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