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// -*- C++ -*-
/**
* @file EC_Dispatching_Task.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_TASK_H
#define TAO_EC_DISPATCHING_TASK_H
#include /**/ "ace/pre.h"
#include "orbsvcs/Event/EC_ProxySupplier.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/RtecEventCommC.h"
#include /**/ "orbsvcs/Event/event_serv_export.h"
#include "ace/Task.h"
#include "ace/Message_Block.h"
#include "ace/Lock_Adapter_T.h"
#include "ace/Service_Config.h"
#include "ace/Global_Macros.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
// Forward decl
class TAO_EC_Dispatching_Task;
class TAO_RTEvent_Serv_Export TAO_EC_Queue_Full_Service_Object : public ACE_Service_Object
{
public:
enum QueueFullActionReturnValue
{
WAIT_TO_EMPTY = 0,
SILENTLY_DISCARD = -1
};
// Called when
virtual int queue_full_action (TAO_EC_Dispatching_Task *task,
TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event
ACE_ENV_ARG_DECL) = 0;
};
class TAO_RTEvent_Serv_Export TAO_EC_Simple_Queue_Full_Action :
public TAO_EC_Queue_Full_Service_Object
{
public:
TAO_EC_Simple_Queue_Full_Action ();
/// Helper function to register the default action into the service
/// configurator.
static int init_svcs (void);
// = The Service_Object entry points
virtual int init (int argc, ACE_TCHAR* argv[]);
virtual int fini (void);
virtual int queue_full_action (TAO_EC_Dispatching_Task *task,
TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event
ACE_ENV_ARG_DECL);
protected:
int queue_full_action_return_value_;
};
class TAO_RTEvent_Serv_Export TAO_EC_Queue : public ACE_Message_Queue<ACE_SYNCH>
{
public:
TAO_EC_Queue (size_t high_water_mark = ACE_Message_Queue_Base::DEFAULT_HWM,
size_t low_water_mark = ACE_Message_Queue_Base::DEFAULT_LWM,
ACE_Notification_Strategy * = 0);
protected:
// = Override the default definition in the Message_Queue, to count
// the number of messages (and not their size).
virtual int is_full_i (void);
};
/**
* @class TAO_EC_Dispatching_Task
*
* @brief Implement the dispatching queues for FIFO and Priority
* dispatching.
*
*/
class TAO_RTEvent_Serv_Export TAO_EC_Dispatching_Task : public ACE_Task<ACE_SYNCH>
{
public:
/// Constructor
TAO_EC_Dispatching_Task (ACE_Thread_Manager* thr_manager = 0, TAO_EC_Queue_Full_Service_Object* queue_full_service_object = 0);
/// Process the events in the queue.
virtual int svc (void);
virtual void push (TAO_EC_ProxyPushSupplier *proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event
ACE_ENV_ARG_DECL);
private:
/// An per-task allocator
ACE_Allocator *allocator_;
/// Helper data structure to minimize memory allocations...
ACE_Locked_Data_Block<ACE_Lock_Adapter<TAO_SYNCH_MUTEX> > data_block_;
/// The queue
TAO_EC_Queue the_queue_;
TAO_EC_Queue_Full_Service_Object* queue_full_service_object_;
};
// ****************************************************************
class TAO_RTEvent_Serv_Export TAO_EC_Dispatch_Command : public ACE_Message_Block
{
public:
/// Constructor, it will allocate its own data block
TAO_EC_Dispatch_Command (ACE_Allocator *mb_allocator = 0);
/// Constructor, it assumes ownership of the data block
TAO_EC_Dispatch_Command (ACE_Data_Block*,
ACE_Allocator *mb_allocator = 0);
/// Destructor
virtual ~TAO_EC_Dispatch_Command (void);
/// Command callback
virtual int execute (ACE_ENV_SINGLE_ARG_DECL_NOT_USED) = 0;
};
// ****************************************************************
class TAO_RTEvent_Serv_Export TAO_EC_Shutdown_Task_Command : public TAO_EC_Dispatch_Command
{
public:
/// Constructor
TAO_EC_Shutdown_Task_Command (ACE_Allocator *mb_allocator = 0);
/// Command callback
virtual int execute (ACE_ENV_SINGLE_ARG_DECL_NOT_USED);
};
// ****************************************************************
class TAO_RTEvent_Serv_Export TAO_EC_Push_Command : public TAO_EC_Dispatch_Command
{
public:
/// Constructor
TAO_EC_Push_Command (TAO_EC_ProxyPushSupplier* proxy,
RtecEventComm::PushConsumer_ptr consumer,
RtecEventComm::EventSet& event,
ACE_Data_Block* data_block,
ACE_Allocator *mb_allocator);
/// Destructor
virtual ~TAO_EC_Push_Command (void);
/// Command callback
virtual int execute (ACE_ENV_SINGLE_ARG_DECL_NOT_USED);
private:
/// The proxy
TAO_EC_ProxyPushSupplier* proxy_;
/// The consumer connected to the proxy when the event was pushed.
RtecEventComm::PushConsumer_var consumer_;
/// The event
RtecEventComm::EventSet event_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "orbsvcs/Event/EC_Dispatching_Task.i"
#endif /* __ACE_INLINE__ */
ACE_STATIC_SVC_DECLARE (TAO_EC_Simple_Queue_Full_Action)
ACE_FACTORY_DECLARE (TAO_RTEvent_Serv, TAO_EC_Simple_Queue_Full_Action)
#include /**/ "ace/post.h"
#endif /* TAO_EC_DISPATCHING_TASK_H */
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