Class TDeltaQueBase

TDeltaQueBase

Support

Supported from 5.0

Description

A base class that provides implementation for the TDeltaQue template class.

The class is abstract and is not intended to be instantiated.

Derivation

Defined in TDeltaQueBase:
CountDown(), CountDown(), DoAddDelta(), DoRemove(), DoRemoveFirst(), FirstDelta(), Reset(), TDeltaQueBase(), TDeltaQueBase(), iFirstDelta

Inherited from TDblQueBase:
DoAddFirst(), DoAddLast(), DoAddPriority(), IsEmpty(), SetOffset(), __DbgTestEmpty(), iHead, iOffset, operator=()

protected : TDeltaQueBase();

Description

Default constructor.

It sets iFirstDelta to NULL.

protected : TDeltaQueBase(TInt anOffset);

Description

Constructor with specified offset.

It sets:

• iFirstDelta to NULL

• TDblQueBase::iOffset to the specified value, through a call to the base class constructor.

Parameters

TBool CountDown();

Description

Decrements the delta value of the first element by one, and returns true if the result is negative or zero.

Return value

TBool CountDown(TInt aValue);

Description

Decrements the delta value of the first element by the specified value, and returns true if the result is negative or zero.

Parameters

Return value

TBool FirstDelta(TInt& aValue);

Description

Gets the delta value of the first list element.

Parameters

Return value

void Reset();

Description

Empties the doubly linked list.

protected : void DoAddDelta(TAny* aPtr,TInt aDelta);

Description

Implements the addition of the specified list element into the list.

This function is called by TDeltaQue::Add().

Parameters

protected : void DoRemove(TAny* aPtr);

Description

Implements the removal of the specified list element from the list.

This function is called by TDeltaQue::Remove().

Parameters

protected : TAny* DoRemoveFirst();

Description

Implements the removal of the first list element from the linked list if its delta value is zero or negative.

This function is called by TDeltaQue::RemoveFirst().

Return value

protected : TInt* iFirstDelta;

Description

Pointer to the delta value in the first link element