MockSegPageEntryIterSource Class Reference

A mock SegPageEntryIterSource that pre-fetches every other page, returning each page twice. More...

#include <MockSegPageEntryIterSource.h>

Inheritance diagram for MockSegPageEntryIterSource:

List of all members.

Public Member Functions
	MockSegPageEntryIterSource (SegmentAccessor const &segmentAccessorInit, PageId beginPageId)
virtual	~MockSegPageEntryIterSource ()
virtual PageId	getNextPageForPrefetch (int &entry, bool &found)
	Retrieves the next pageId to be pre-fetched, also filling in context- specific information associated with the page.
virtual void	initPrefetchEntry (int &entry)
	Initializes a specific entry in the pre-fetch queue.
Private Attributes
int	counter
PageId	nextPageId
SegmentAccessor	segmentAccessor

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Detailed Description

A mock SegPageEntryIterSource that pre-fetches every other page, returning each page twice.

The context associated with each page returned is a sequencing counter, starting at 0.

Definition at line 39 of file MockSegPageEntryIterSource.h.

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Constructor & Destructor Documentation

MockSegPageEntryIterSource::MockSegPageEntryIterSource	(	SegmentAccessor const &	segmentAccessorInit,
		PageId	beginPageId
	)			[explicit]

Definition at line 30 of file MockSegPageEntryIterSource.cpp.

References counter, nextPageId, and segmentAccessor.

    : SegPageEntryIterSource<int>()
{
    counter = 0;
    segmentAccessor = segmentAccessorInit;
    nextPageId = beginPageId;
}

MockSegPageEntryIterSource::~MockSegPageEntryIterSource

(

)

[virtual]

Definition at line 40 of file MockSegPageEntryIterSource.cpp.

{
}

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Member Function Documentation

PageId MockSegPageEntryIterSource::getNextPageForPrefetch	(	int &	entry,
		bool &	found
	)			[virtual]

Retrieves the next pageId to be pre-fetched, also filling in context- specific information associated with the page.

Parameters:

[in,out]	entry	the context-specific information to be filled in
[out]	found	true if a pageId has been found and should be added to the pre-fetch queue

Returns:

the prefetch pageId

Implements SegPageEntryIterSource< int >.

Definition at line 44 of file MockSegPageEntryIterSource.cpp.

References counter, nextPageId, NULL_PAGE_ID, SegmentAccessor::pSegment, and segmentAccessor.

{
    found = true;
    entry = counter++;
    // Only need to figure out the next page on every other iteration
    if (counter % 2) {
        return nextPageId;
    }
    PageId currPageId = nextPageId;
    nextPageId = segmentAccessor.pSegment->getPageSuccessor(nextPageId);
    if (nextPageId != NULL_PAGE_ID) {
        nextPageId = segmentAccessor.pSegment->getPageSuccessor(nextPageId);
    }
    return currPageId;
}

virtual void SegPageEntryIterSource< int >::initPrefetchEntry

(

int &

entry

)

[inline, virtual, inherited]

Initializes a specific entry in the pre-fetch queue.

Parameters:

entry

the entry that will be initialized

Definition at line 46 of file SegPageEntryIterSource.h.

    {
    }

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Member Data Documentation

int MockSegPageEntryIterSource::counter [private]

Definition at line 42 of file MockSegPageEntryIterSource.h.

Referenced by getNextPageForPrefetch(), and MockSegPageEntryIterSource().

PageId MockSegPageEntryIterSource::nextPageId [private]

Definition at line 43 of file MockSegPageEntryIterSource.h.

Referenced by getNextPageForPrefetch(), and MockSegPageEntryIterSource().

SegmentAccessor MockSegPageEntryIterSource::segmentAccessor [private]

Definition at line 44 of file MockSegPageEntryIterSource.h.

Referenced by getNextPageForPrefetch(), and MockSegPageEntryIterSource().

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

• /home/pub/open/dev/fennel/segment/MockSegPageEntryIterSource.h
• /home/pub/open/dev/fennel/segment/MockSegPageEntryIterSource.cpp

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