TAO_EC_Priority_Dispatching Class Reference

Dispatching strategy that minimizes priority inversion. More...

#include <EC_Priority_Dispatching.h>

Inheritance diagram for TAO_EC_Priority_Dispatching:

Collaboration diagram for TAO_EC_Priority_Dispatching:

Public Member Functions
	TAO_EC_Priority_Dispatching (TAO_EC_Event_Channel_Base *ec)
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)
virtual void	push_nocopy (TAO_EC_ProxyPushSupplier *proxy, RtecEventComm::PushConsumer_ptr consumer, RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
Public Member Functions inherited from TAO_EC_Dispatching
virtual	~TAO_EC_Dispatching (void)
	Destructor... More...

Private Attributes
ACE_Thread_Manager	thread_manager_
	Use our own thread manager. More...
int	ntasks_
	The number of active tasks. More...
TAO_EC_Dispatching_Task **	tasks_
	The tasks.. More...
RtecScheduler::Scheduler_var	scheduler_
	The scheduler. More...

Detailed Description

Dispatching strategy that minimizes priority inversion.

This strategy uses multiple queues, each serviced by a thread at different priority. This minimizes priority inversion because the consumers at higher priority are serviced before consumers at lower priority. It is more flexible than using the supplier thread to dispatch because it allows high-priority suppliers to push events to low-priority consumers (and vice-versa). It also isolates the supplier threads from the time spent on upcalls to the consumer objects, making the system easier to analyze and schedule.

Constructor & Destructor Documentation

TAO_EC_Priority_Dispatching::TAO_EC_Priority_Dispatching

(

TAO_EC_Event_Channel_Base *

ec

)

The scheduler is used to find the range of priorities and similar info.

Member Function Documentation

void TAO_EC_Priority_Dispatching::activate ( void  )

virtual

Initialize all the data structures, activate any internal threads, etc.

Implements TAO_EC_Dispatching.

void TAO_EC_Priority_Dispatching::push ( TAO_EC_ProxyPushSupplier *  proxy, RtecEventComm::PushConsumer_ptr  consumer, const RtecEventComm::EventSet &  event, TAO_EC_QOS_Info &  qos_info  )

virtual

The consumer represented by proxy should receive event. It can use the information in qos_info to determine the event priority (among other things).

Implements TAO_EC_Dispatching.

void TAO_EC_Priority_Dispatching::push_nocopy ( TAO_EC_ProxyPushSupplier *  proxy, RtecEventComm::PushConsumer_ptr  consumer, RtecEventComm::EventSet &  event, TAO_EC_QOS_Info &  qos_info  )

virtual

Implements TAO_EC_Dispatching.

void TAO_EC_Priority_Dispatching::shutdown ( void  )

virtual

Deactivate any internal threads and cleanup internal data structures, it should only return once the threads have finished their jobs.

Implements TAO_EC_Dispatching.

Member Data Documentation

int TAO_EC_Priority_Dispatching::ntasks_

private

The number of active tasks.

RtecScheduler::Scheduler_var TAO_EC_Priority_Dispatching::scheduler_

private

The scheduler.

TAO_EC_Dispatching_Task** TAO_EC_Priority_Dispatching::tasks_

private

The tasks..

ACE_Thread_Manager TAO_EC_Priority_Dispatching::thread_manager_

private

Use our own thread manager.

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The documentation for this class was generated from the following files:

• EC_Priority_Dispatching.h
• EC_Priority_Dispatching.cpp