Assassin Class Reference

Handling for the "killer"-IPI, that is a message indicating that a thread should be terminated. More...

#include <assassin.h>

Inheritance diagram for Assassin:

Collaboration diagram for Assassin:

Public Member Functions
void	hire ()
	Configure the Assassin.
bool	prologue ()
	Interrupt Prologue.
virtual void	epilogue ()
	Interrupt Epilogue.
Public Member Functions inherited from Gate
	Gate ()
	Constructor.
virtual	~Gate ()
	Destructor.
virtual bool	prologue ()=0
	Device-specific interrupt handling routine that is executed immediately after the interrupt occurs (asynchronously).
virtual void	epilogue ()
	Possibly delayed, synchronously executed Device-specific interrupt handling routine.

Detailed Description

Handling for the "killer"-IPI, that is a message indicating that a thread should be terminated.

Only required for MPStuBS.

If one thread wants to terminate another thread by calling Scheduler::kill(), and the thread to be killed is currently being executed on another CPU, this CPU needs to be notified that the active process is to be killed. MPStuBS relies on an inter-processor interrupt (IPI) for this purpose. The class Assassin shall handle the IPI by removing the active thread from scheduling and issue a reschedule iff the active thread has a set kill flag.

Member Function Documentation

epilogue()

void Assassin::epilogue ( )

virtual

Interrupt Epilogue.

The epilogue now should check the dying flag of the currently running thread and, if set, issue a rescheduling.

Reimplemented from Gate.

hire()

void Assassin::hire

(

)

Configure the Assassin.

Setup the plugbox, such that the assassin will be executed once the corresponding IPI is issued.

prologue()

bool Assassin::prologue ( )

virtual

Interrupt Prologue.

There is nothing to do in the prologue expect requesting an epilogue.

Returns

true to request an epilogue

Implements Gate.

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

• thread/assassin.h
• thread/assassin.cc