TAO_RTEvent
2.1.6
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Dispatching strategy that minimizes priority inversion. More...
#include <EC_Priority_Dispatching.h>
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) |
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virtual | ~TAO_EC_Dispatching (void) |
Destructor... |
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. |
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.
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.
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Initialize all the data structures, activate any internal threads, etc.
Implements TAO_EC_Dispatching.
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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.
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Implements TAO_EC_Dispatching.
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Deactivate any internal threads and cleanup internal data structures, it should only return once the threads have finished their jobs.
Implements TAO_EC_Dispatching.
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The number of active tasks.
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The scheduler.
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The tasks..
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Use our own thread manager.