BasicDelegate Class Reference

Inheritance diagram for BasicDelegate:

[legend]Collaboration diagram for BasicDelegate:

[legend]List of all members.

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Detailed Description

A simple delegate that computes the number of deadlines missed and passes the value to Broker::RealTimeAdvocate::ReportCPU.

Public Member Functions
	BasicDelegate (const char *name, unsigned long period, unsigned long deadline)
	Construct a BasicDelegate with the given values.
virtual	~BasicDelegate ()
	Deconstruct a BasicDelegate.
virtual rk_stub_precall_retval_t	precall (void)
	Premethod callback that just records the current time.
virtual void	postcall (void)
	Postmethod callback that computes how many deadlines have been missed and reports the results to bd_Advocate.
Public Attributes
Broker::TaskParameters	bd_TaskDescription
	TaskParameters constructed by the object that can be passed on to Broker::TaskFactory::CreateTask.
Broker::ScheduleParameters	bd_CPUSchedule
	ScheduleParameters constructed by the object that can be passed on to Broker::Task::BeginScheduling.
Broker::RealTimeAdvocate_var	bd_Advocate
	The process' advocate, this must be set by the code using the object.
Protected Attributes
unsigned long	bd_Period
	The period of the process in microseconds.
unsigned long	bd_Deadline
	The deadline of the process in microseconds and relative to the start of the period.
int	bd_AdviseDrop
	The number of data segments to drop in order to get back on schedule.
pid_t	bd_PID
	The simulated process ID.
timespec	bd_Start
	The "method" starting time as recorded by precall().
rusage	bd_RUStart
	The resource usage at the "method" starting time.

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Constructor & Destructor Documentation

BasicDelegate::BasicDelegate (  const char *  name, unsigned long  period, unsigned long  deadline )

Construct a BasicDelegate with the given values. This includes: Creating the process with rk_stub_mk_pid. Initializing the bd_TaskDescription and bd_CPUSchedule parameter lists. and initializing internal state. Parameters: name  The name of the process. This will be passed on to rk_stub_mk_pid. period  The period of the process in microseconds. deadline  The deadline of the process in microseconds and relative to the start of the period.

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Member Function Documentation

rk_stub_precall_retval_t BasicDelegate::precall (  void   )  [virtual]

Premethod callback that just records the current time. Returns: RKSP_OK if the process is on schedule or RKSP_DROP if it is running late and needs to drop data in order to catch up. Implements Delegate. Reimplemented in ContractDelegate.

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Member Data Documentation

int BasicDelegate::bd_AdviseDrop [protected]

The number of data segments to drop in order to get back on schedule. This will be set by postcall() when it detects how many deadlines have been missed.

Broker::RealTimeAdvocate_var BasicDelegate::bd_Advocate

The process' advocate, this must be set by the code using the object. The user must also call Broker::Task::BeginCPUScheduling and Broker::Task::EndCPUScheduling.

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

• BasicDelegate.hh
• BasicDelegate.cc

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