Hypertable::FlyweightString Class Reference

The Flyweight string set stores duplicate strings efficiently. More...

#include <FlyweightString.h>

Collaboration diagram for Hypertable::FlyweightString:

Public Member Functions
	FlyweightString ()
	~FlyweightString ()
	The destructor deletes all internal pointers and clears the set; pointers retrieved with. More...
const char *	get (const char *str)
	Returns a copy of the string; this string is valid till the FlyweightString set is destructed. More...
const char *	get (const std::string &str)
	Returns a copy of the string; this string is valid till the FlyweightString set is destructed. More...
const char *	get (const char *str, size_t len)
	Returns a copy of the string; this string is valid till the FlyweightString set is destructed. More...
void	clear ()
	Clears and deallocates the set of strings. More...

Private Types
typedef PageArenaAllocator < const char * >	CstrSetAlloc
typedef std::set< const char *, LtCstr, CstrSetAlloc >	CstrSet

Private Attributes
CharArena	m_arena
	The page arena. More...
CstrSet	m_strings
	The std::set holding the strings. More...

Detailed Description

The Flyweight string set stores duplicate strings efficiently.

Definition at line 43 of file FlyweightString.h.

Member Typedef Documentation

typedef std::set<const char*, LtCstr, CstrSetAlloc> Hypertable::FlyweightString::CstrSet

private

Definition at line 113 of file FlyweightString.h.

typedef PageArenaAllocator<const char*> Hypertable::FlyweightString::CstrSetAlloc

private

Definition at line 112 of file FlyweightString.h.

Constructor & Destructor Documentation

Hypertable::FlyweightString::FlyweightString ( )

inline

Definition at line 46 of file FlyweightString.h.

Hypertable::FlyweightString::~FlyweightString ( )

inline

The destructor deletes all internal pointers and clears the set; pointers retrieved with.

See also

get() are invalidated.

Definition at line 53 of file FlyweightString.h.

Member Function Documentation

void Hypertable::FlyweightString::clear ( )

inline

Clears and deallocates the set of strings.

This function walks through m_strings, deallocating each string it finds, and then clears m_strings.

Definition at line 105 of file FlyweightString.h.

const char* Hypertable::FlyweightString::get ( const char *  str )

inline

Returns a copy of the string; this string is valid till the FlyweightString set is destructed.

Duplicate strings are not inserted twice.

Parameters

str	The string to insert

Returns

A copy of the inserted string

Definition at line 62 of file FlyweightString.h.

const char* Hypertable::FlyweightString::get ( const std::string &  str )

inline

Returns a copy of the string; this string is valid till the FlyweightString set is destructed.

Duplicate strings are not inserted twice.

Parameters

str	The string to insert

Returns

A copy of the inserted string

Definition at line 78 of file FlyweightString.h.

const char* Hypertable::FlyweightString::get ( const char *  str, size_t  len  )

inline

Returns a copy of the string; this string is valid till the FlyweightString set is destructed.

Duplicate strings are not inserted twice.

Parameters

str	The string to insert
len	The length of the string

Returns

A copy of the inserted string

Definition at line 93 of file FlyweightString.h.

Member Data Documentation

CharArena Hypertable::FlyweightString::m_arena

private

The page arena.

Definition at line 116 of file FlyweightString.h.

CstrSet Hypertable::FlyweightString::m_strings

private

The std::set holding the strings.

Definition at line 119 of file FlyweightString.h.

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

• /home/doug/src/hypertable/src/cc/Common/FlyweightString.h