Zygoma::PageFrameLinearPolicy Class Reference

#include <pageframelinearpolicy.h>

Inheritance diagram for Zygoma::PageFrameLinearPolicy:

[legend]Collaboration diagram for Zygoma::PageFrameLinearPolicy:

[legend]List of all members.

Public Member Functions
virtual PageFrameTable::FrameIndex	selectUnusedFrame () const
	Selects an unused page frame according to policy.
virtual PageFrameTable::FrameIndex	selectReplacementFrame ()
	Selects a page frame for replacement according to the current policy.
virtual PageFrameTable::FrameIndex	selectReplacementFrame () const =0
	Selects a page frame for replacement according to the current policy.
Protected Member Functions
const PageFrame &	getFrame (PageFrameTable *pageFrameTable, PageFrameTable::FrameIndex frameIndex)
	Pulls up page frame information for an indexed page frame in the page fram table.

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Member Function Documentation

const PageFrame& Zygoma::PageFrameSelectionPolicy::getFrame (  PageFrameTable *  pageFrameTable, PageFrameTable::FrameIndex  frameIndex )  [protected, inherited]

Pulls up page frame information for an indexed page frame in the page fram table. Parameters: pageFrameTable  The page frame table. frameIndex  Index of the page frame to pull. Returns: A const reference to the indexed page frame.

virtual PageFrameTable::FrameIndex Zygoma::PageFrameSelectionPolicy::selectReplacementFrame (   )  const [pure virtual, inherited]

Selects a page frame for replacement according to the current policy. A replacement frame may or may not currently be in use. The policy must always be ablw to make a page frame available for replacement, even if there is only one frame in the table. Well, I guess a zero-sized page frame table is the degenerate case, but I doubt things would have got as far as starting virtual memory if there was so little memory in the system. Returns: The index of a page frame to be used as a replacement.

virtual PageFrameTable::FrameIndex Zygoma::PageFrameLinearPolicy::selectReplacementFrame (   )  [virtual]

Selects a page frame for replacement according to the current policy. A replacement frame may or may not currently be in use. The policy must always be ablw to make a page frame available for replacement, even if there is only one frame in the table. Well, I guess a zero-sized Page frame table is the degenerate case, but I doubt things would have got as far as starting virtual memory if there was so little memory in the system. Returns: The index of a page frame to be used as a replacement.

virtual PageFrameTable::FrameIndex Zygoma::PageFrameLinearPolicy::selectUnusedFrame (   )  const [virtual]

Selects an unused page frame according to policy. Returns: The index of an unused page frame. Todo: Determine special value for "no frame available". Implements Zygoma::PageFrameSelectionPolicy.

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

• pageframelinearpolicy.h

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