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/* -*- C++ -*- */
// $Id$
//
// ============================================================================
//
// = LIBRARY
// ORBSVCS Real-time Event Channel
//
// = FILENAME
// EC_MT_Dispatching
//
// = AUTHOR
// Carlos O'Ryan (coryan@cs.wustl.edu)
//
// = CREDITS
// 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://www.cs.wustl.edu/~schmidt/oopsla.ps.gz
// http://www.cs.wustl.edu/~schmidt/JSAC-98.ps.gz
//
//
// ============================================================================
#ifndef TAO_EC_MT_DISPATCHING_H
#define TAO_EC_MT_DISPATCHING_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_Event_Channel;
class TAO_ORBSVCS_Export TAO_EC_MT_Dispatching : public TAO_EC_Dispatching
{
// = TITLE
// Dispatching strategy that minimizes mt inversion.
//
// = DESCRIPTION
// 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.
//
public:
TAO_EC_MT_Dispatching (int nthreads,
int thread_creation_flags,
int thread_priority,
int force_activate);
// Constructor
// It will create <nthreads> servicing threads...
// = The EC_Dispatching methods.
virtual void activate (void);
virtual void shutdown (void);
virtual void push (TAO_EC_ProxyPushSupplier* proxy,
const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info,
CORBA::Environment& env);
virtual void push_nocopy (TAO_EC_ProxyPushSupplier* proxy,
RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info,
CORBA::Environment& env);
private:
ACE_Thread_Manager thread_manager_;
// Use our own thread manager.
int nthreads_;
// The number of active tasks
int thread_creation_flags_;
// The flags (THR_BOUND, THR_NEW_LWP, etc.) used to create the
// dispatching threads.
int thread_priority_;
// The priority of the dispatching threads.
int force_activate_;
// If activation at the requested priority fails then we fallback on
// the defaults for thread activation.
TAO_EC_Dispatching_Task task_;
// The dispatching task
ACE_SYNCH_MUTEX lock_;
// Synchronize access to internal data
int active_;
// Are the threads running?
};
#if defined (__ACE_INLINE__)
#include "EC_MT_Dispatching.i"
#endif /* __ACE_INLINE__ */
#endif /* TAO_EC_MT_DISPATCHING_H */
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