mempool Class Reference

Memory pool. More...

#include <mempool.h>

Collaboration diagram for mempool:

List of all members.

Public Member Functions

mempool (int is, int bs)

Creates a memory pool.

~mempool ()

Destroys memory pool.

void map (std::ostream &co)

Prints a map of memory occupancy.

char * allocate ()

Allocates a single memory entry.

int free (char *addr)

Frees a single memory entry.

void stat ()

Prints statistics about this mempool.

int used ()

Returns effectively used memory (bytes).

int wasted ()

Returns amount of wasted memory (bytes).

Detailed Description

Memory pool.

A memory pool is composed of:

a linked list of block_num memory blocks
each block might contain up to block_size items
each item is made of exactly item_size bytes

Definition at line 59 of file mempool.h.

Constructor & Destructor Documentation

mempool::mempool	(	int	is,
		int	bs
	)

Creates a memory pool.

The pool contains:

entries of size is
tables for bs entries

Definition at line 51 of file mempool.cpp.

References NULL.

mempool::~mempool ( )

Destroys memory pool.

Definition at line 162 of file mempool.cpp.

References NULL.

Member Function Documentation

char * mempool::allocate ( )

Allocates a single memory entry.

Definition at line 91 of file mempool.cpp.

References NULL.

Referenced by ngramcache::add(), storage::allocate(), storage::reallocate(), and htable::search().

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int mempool::free ( char * addr )

Frees a single memory entry.

Definition at line 136 of file mempool.cpp.

Referenced by storage::free(), and storage::reallocate().

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void mempool::map ( std::ostream & co )

Prints a map of memory occupancy.

void mempool::stat ( )

Prints statistics about this mempool.

Definition at line 208 of file mempool.cpp.

References TRACE_ERR.

int mempool::used ( ) [inline]

Returns effectively used memory (bytes).

includes 8 bytes required by each call of new

Definition at line 90 of file mempool.h.

Referenced by storage::stat(), htable::used(), and wasted().

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int mempool::wasted ( ) [inline]

Returns amount of wasted memory (bytes).

Definition at line 93 of file mempool.h.

References used().

Referenced by storage::stat().

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

irstlm/src/mempool.h
irstlm/src/mempool.cpp


Public Member Functions
	mempool (int is, int bs)
	Creates a memory pool.
	~mempool ()
	Destroys memory pool.
void	map (std::ostream &co)
	Prints a map of memory occupancy.
char *	allocate ()
	Allocates a single memory entry.
int	free (char *addr)
	Frees a single memory entry.
void	stat ()
	Prints statistics about this mempool.
int	used ()
	Returns effectively used memory (bytes).
int	wasted ()
	Returns amount of wasted memory (bytes).