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:

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Collaboration diagram for TAO_EC_Priority_Dispatching:

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List of all members.

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 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 Attributes

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

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  ACE_ENV_ARG_DECL
[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  ACE_ENV_ARG_DECL
[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.


The documentation for this class was generated from the following files:
Generated on Wed Nov 23 16:18:51 2005 for TAO_RTEvent by  doxygen 1.4.5