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/* -*- C++ -*- */
/**
* @file Kokyu_dsrt.h
*
* $Id$
*
* @author Venkita Subramonian (venkita@cs.wustl.edu)
*
*/
#ifndef KOKYU_DSRT_H
#define KOKYU_DSRT_H
#include /**/ "ace/pre.h"
#include "ace/Copy_Disabled.h"
#include "kokyu_export.h"
#include "Kokyu_defs.h"
namespace Kokyu
{
template <class DSRT_Scheduler_Traits> class DSRT_Dispatcher_Impl;
/**
* @class DSRT_Dispatcher
*
* @brief Interface class for dynamic scheduling of threads
*
* The responsibility of this class is to forward all methods to
* its delegation/implementation class, e.g.,
* @c Default_DSRT_Dispatcher_Impl. This class follows the pImpl idiom
* or the bridge pattern to separate the implementation from the interface.
* DSRT_Dispatcher is the class that users will be using to achieve
* dynamic scheduling of threads.
*/
template <class DSRT_Scheduler_Traits>
class DSRT_Dispatcher : private ACE_Copy_Disabled
{
public:
typedef typename DSRT_Scheduler_Traits::Guid_t Guid_t;
typedef typename DSRT_Scheduler_Traits::QoSDescriptor_t DSRT_QoSDescriptor;
// = Scheduling methods.
/// Schedule a thread dynamically based on the qos info supplied.
int schedule (Guid_t guid, const DSRT_QoSDescriptor&);
/// Update the schedule for a thread. This could alter the current schedule.
int update_schedule (Guid_t guid, const DSRT_QoSDescriptor&);
/// Inform the scheduler that the caller thread is about to
/// block. This could alter the current schedule.
int update_schedule (Guid_t guid, Kokyu::Block_Flag_t flag);
/// Cancel the schedule for a thread. This could alter the current schedule.
int cancel_schedule (Guid_t guid);
/// Supply this interface with an appropriate implementation.
void implementation (DSRT_Dispatcher_Impl<DSRT_Scheduler_Traits>*);
// = Termination methods.
/// Shut down the dispatcher. The dispatcher will stop processing requests.
int shutdown ();
/// Non virtual destructor. Read as <b><i>this class not available
/// for inheritance<i></b>.
~DSRT_Dispatcher ();
private:
/// Auto ptr to the implementation. Implementation will be created on the
/// heap and deleted automatically when the dispatcher object is destructed.
auto_ptr<DSRT_Dispatcher_Impl<DSRT_Scheduler_Traits> > dispatcher_impl_;
};
/**
* @class DSRT_Dispatcher_Factory
*
* @brief Factory class to create one of the dispatcher interface
* objects - for events or DSRT threads.
*
* Factory class creates a dispatcher or DSRT dispatcher and configures
* the interface object with the appropriate implementation.
*/
template <class DSRT_Scheduler_Traits>
class DSRT_Dispatcher_Factory : private ACE_Copy_Disabled
{
public:
typedef auto_ptr<DSRT_Dispatcher<DSRT_Scheduler_Traits> > DSRT_Dispatcher_Auto_Ptr;
/**
* Create a dispatcher for dynamic dispatching of threads.
* This will be used to dynamic scheduling of distributable threads for
* DSRTCORBA. The caller is responsible for freeing the memory.
*
* @param config Configuration information for the DSRT dispatcher.
*
* @return pointer to the DSRT dispatcher.
*/
static DSRT_Dispatcher<DSRT_Scheduler_Traits>* create_DSRT_dispatcher (const DSRT_ConfigInfo&);
};
/**
* @class MIF_Sched_Strategy
*
* @brief Strategy class implementing Maximum Importance First
* reordering strategy.
*
*/
template <class QoSDesc>
class MIF_Comparator
{
public:
typedef typename QoSDesc::Importance_t Importance_t;
int operator ()(const QoSDesc& qos1,
const QoSDesc& qos2);
};
/**
* @class Fixed_Priority_Sched_Strategy
*
* @brief Strategy class implementing Fixed Priority reordering
* strategy.
*
*/
template <class QoSDesc>
class Fixed_Priority_Comparator
{
public:
typedef typename QoSDesc::Priority_t Priority_t;
int operator ()(const QoSDesc& qos1,
const QoSDesc& qos2);
};
/**
* @class MUF_Sched_Strategy
*
* @brief Strategy class implementing Maximum Urgency First
* reordering strategy.
*
*/
template <class QoSDesc>
class MUF_Comparator
{
public:
typedef typename QoSDesc::Criticality_t Criticality_t;
typedef typename QoSDesc::Time_t Time_t;
int operator ()(const QoSDesc& qos1,
const QoSDesc& qos2);
};
} //end of namespace
#if defined (__ACE_INLINE__)
#include "Kokyu_dsrt.inl"
#endif /* __ACE_INLINE__ */
#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
#include "Kokyu_dsrt.cpp"
#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
#pragma implementation ("Kokyu_dsrt.cpp")
#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
#include /**/ "ace/post.h"
#endif /* KOKYU_DSRT_H */
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