TAO_EC_Kokyu_Dispatching Class Reference

Dispatching strategy that minimizes priority inversion. More...

#include <EC_Kokyu_Dispatching.h>

Inheritance diagram for TAO_EC_Kokyu_Dispatching:

[legend]Collaboration diagram for TAO_EC_Kokyu_Dispatching:


Public Member Functions
	TAO_EC_Kokyu_Dispatching (TAO_EC_Event_Channel_Base *ec, int sched_policy, int sched_scope)
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 Member Functions
void	setup_lanes (void)
Private Attributes
ACE_Allocator *	allocator_
Kokyu::Dispatcher_Auto_Ptr	dispatcher_
	The dispatcher.
RtecScheduler::Scheduler_var	scheduler_
	The scheduler.
int	lanes_setup_
int	disp_sched_policy_
int	disp_sched_scope_

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_BEGIN_VERSIONED_NAMESPACE_DECL TAO_EC_Kokyu_Dispatching::TAO_EC_Kokyu_Dispatching	(	TAO_EC_Event_Channel_Base *	ec,
		int	sched_policy,
		int	sched_scope
	)

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

Member Function Documentation

void TAO_EC_Kokyu_Dispatching::activate ( void ) [virtual]

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

Implements TAO_EC_Dispatching.

void TAO_EC_Kokyu_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_Kokyu_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]`