Dragon Class Reference

The Dragon coherence protocol. More...

#include <dragon.h>

Inheritance diagram for Dragon:

Collaboration diagram for Dragon:

Public Member Functions
	Dragon (CacheABC &cache)
	Construct a new Dragon coherence protocol. More...
void	PrRd (cache_line *line)
	Receive a PrRd message. More...
void	PrWr (cache_line *line)
	Receive a PrWr message. More...
bool	BusRd (cache_line *line)
	Receive a BusRd message. More...
bool	BusUpdt (cache_line *line)
	Receive a BusUpdt message. More...
bool	doesDirtySharing ()
	Determine whether the coherence protocol does dirty sharing. More...
bool	isWriteBackNeeded (state_e state)
	Determine whether a line needs to be written back to main memory. More...
Public Member Functions inherited from CoherenceProtocol
	CoherenceProtocol (CacheABC &cache)
	Construct a new coherence protocol. More...
virtual bool	BusRdX (cache_line *line)
	Receive a BusRdX message. More...
virtual bool	BusUpgr (cache_line *line)
	Receive a BusUpgr message. More...
virtual bool	BusWr (cache_line *line)
	Receive a BusWr message. More...
virtual bool	doesWriteNoAllocate ()
	Determine whether the coherence protocol uses write no-allocate. More...

Additional Inherited Members
Protected Attributes inherited from CoherenceProtocol
CacheABC &	cache
	The parent cache.

Detailed Description

The Dragon coherence protocol.

Constructor & Destructor Documentation

Dragon()

Dragon::Dragon ( CacheABC &  cache )

inline

Construct a new Dragon coherence protocol.

Parameters

cache

The parent cache

Member Function Documentation

BusRd()

bool Dragon::BusRd ( cache_line *  line )

virtual

Receive a BusRd message.

Parameters

line	The cache line accessed

Returns

True if the line data can be or could have been shared

Implements CoherenceProtocol.

BusUpdt()

bool Dragon::BusUpdt ( cache_line *  line )

virtual

Receive a BusUpdt message.

Parameters

line	The cache line accessed

Returns

True if the line data can be or could have been shared

Reimplemented from CoherenceProtocol.

doesDirtySharing()

bool Dragon::doesDirtySharing ( )

virtual

Determine whether the coherence protocol does dirty sharing.

Returns

True if the coherence protocol does dirty sharing

Reimplemented from CoherenceProtocol.

isWriteBackNeeded()

bool Dragon::isWriteBackNeeded ( state_e  state )

virtual

Determine whether a line needs to be written back to main memory.

Parameters

state

The state of the line

Returns

Whether the line needs to be written back to main memory

Implements CoherenceProtocol.

PrRd()

void Dragon::PrRd ( cache_line *  line )

virtual

Receive a PrRd message.

Parameters

line	The cache line accessed (non-null)

Implements CoherenceProtocol.

PrWr()

void Dragon::PrWr ( cache_line *  line )

virtual

Receive a PrWr message.

Parameters

line	The cache line accessed (non-null)

Implements CoherenceProtocol.

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

• src/coherence/dragon.h
• src/coherence/dragon.cc