Gate Class Reference

Class of objects that are capable of handling interrupts. More...

#include <gate.h>

Inheritance diagram for Gate:

Collaboration diagram for Gate:

Public Member Functions
	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.

Private Attributes
Gate *	queue_link
	Pointer to next element for Queue.

Friends
class	Queue< Gate >

Detailed Description

Class of objects that are capable of handling interrupts.

All objects to be assigned in Plugbox must be derived from this class.

Each inheriting class must now define the virtual method Gate::epilogue(). For the virtual method Gate::epilogue() an empty implementation can be specified in this parent class, so derived device classes do not necessarily have to define an Gate::epilogue() on their own.

Note

To be able to enqueue each class inheriting from Gate into the linked list implemented by Queue this class has to contain a member acting as next pointer

Constructor & Destructor Documentation

~Gate()

virtual Gate::~Gate ( )

inlinevirtual

Destructor.

Classes with virtual methods should always have a virtual destructor (which can be empty as well). In StuBS this will calm the compiler, on other systems this will guarantee that delete will free the memory for objects of the derived classes correctly.

Member Function Documentation

prologue()

virtual bool Gate::prologue ( )

pure virtual

Device-specific interrupt handling routine that is executed immediately after the interrupt occurs (asynchronously).

Returns

true if the epilogue has to be executed.

Implemented in Keyboard, Panic, and Watch.

Member Data Documentation

queue_link

Gate* Gate::queue_link

private

Pointer to next element for Queue.

This has to be a single pointer (not an array) for OOStuBS.

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

• interrupt/gate.h