Pool Class Reference

#include <bufpool.h>

Collaboration diagram for Pool:

Public Member Functions
	Pool (int, int, const char *)
	~Pool (void)
void *	new_buffer (void)
void	free_buffer (void *)
void	clear (void)

Protected Types
enum	Magic { is_allocated = 0xf3a1 , is_free = 0xf1a2 }

Protected Attributes
Buffer *	freelist
char *	blocklist [NBLOCKS]
int	nextblock
char *	curblock
int	buffersize
int	nextsize
int	nextfree
int	initsize
const char *	name
Magic	magic

Private Member Functions
void	grow (void)

Detailed Description

Definition at line 50 of file bufpool.h.

Member Enumeration Documentation

Magic

enum Pool::Magic

protected

Enumerator
is_allocated
is_free

Definition at line 70 of file bufpool.h.

{ is_allocated = 0xf3a1, is_free = 0xf1a2 };

Constructor & Destructor Documentation

Pool()

Pool::Pool	(	int	_buffersize,
		int	initpoolsize,
		const char *	n
	)

Definition at line 49 of file bufpool.cc.

{
    if((unsigned)_buffersize < sizeof(Buffer))
        buffersize = sizeof(Buffer);
    else
        buffersize = _buffersize;
    initsize    = initpoolsize * buffersize;
    nextsize    = initsize;
    name    = n;
    magic   = is_allocated;
    nextblock   = 0;
    curblock    = 0;
    freelist    = 0;
    nextfree    = 0;
    for (int i = 0; i < NBLOCKS; i++) {
        blocklist[i] = 0;
    }
}

~Pool()

Pool::~Pool

(

void

)

Definition at line 73 of file bufpool.cc.

{
    assert( (this != 0) && (magic == is_allocated) );
 
    while( nextblock ) {
    delete [] blocklist[--nextblock];
        blocklist[nextblock] = 0;
    }
    magic = is_free;
}

Member Function Documentation

clear()

void Pool::clear

(

void

)

Definition at line 100 of file bufpool.cc.

{
    assert( (this != 0) && (magic == is_allocated) );
 
    while( nextblock ) {
    delete [] blocklist[--nextblock];
    blocklist[nextblock] = 0;
    }
    curblock    = 0;
    freelist    = 0;
    nextfree    = 0;
    if( nextsize > initsize )
        nextsize /= 2;
}

Referenced by Subdivider::clear(), and Maplist::freeMaps().

free_buffer()

void Pool::free_buffer ( void *  b )

inline

Definition at line 81 of file bufpool.h.

{
    assert( (this != 0) && (magic == is_allocated) );
 
    /* add buffer to singly connected free list */
 
    ((Buffer *) b)->next = freelist;
    freelist = (Buffer *) b;
}

grow()

void Pool::grow ( void  )

private

Definition at line 85 of file bufpool.cc.

{
    assert( (this != 0) && (magic == is_allocated) );
    curblock = new char[nextsize];
    blocklist[nextblock++] = curblock;
    nextfree = nextsize;
    nextsize *= 2;
}

Referenced by new_buffer().

new_buffer()

void * Pool::new_buffer ( void  )

inline

Definition at line 98 of file bufpool.h.

{
    void *buffer;
 
    assert( (this != 0) && (magic == is_allocated) );
 
    /* find free buffer */
 
    if( freelist ) {
        buffer = (void *) freelist; 
        freelist = freelist->next;
    } else {
        if( ! nextfree )
            grow( );
        nextfree -= buffersize;;
        buffer = (void *) (curblock + nextfree);
    }
    return buffer;
}

Member Data Documentation

blocklist

char* Pool::blocklist[NBLOCKS]

protected

Definition at line 63 of file bufpool.h.

Referenced by clear(), grow(), Pool(), and ~Pool().

buffersize

int Pool::buffersize

protected

Definition at line 66 of file bufpool.h.

Referenced by new_buffer(), and Pool().

curblock

char* Pool::curblock

protected

Definition at line 65 of file bufpool.h.

Referenced by clear(), grow(), new_buffer(), and Pool().

freelist

Buffer* Pool::freelist

protected

Definition at line 62 of file bufpool.h.

Referenced by clear(), free_buffer(), new_buffer(), and Pool().

initsize

int Pool::initsize

protected

Definition at line 69 of file bufpool.h.

Referenced by clear(), and Pool().

magic

Magic Pool::magic

protected

Definition at line 72 of file bufpool.h.

Referenced by clear(), free_buffer(), grow(), new_buffer(), Pool(), and ~Pool().

name

const char* Pool::name

protected

Definition at line 71 of file bufpool.h.

nextblock

int Pool::nextblock

protected

Definition at line 64 of file bufpool.h.

Referenced by clear(), grow(), Pool(), and ~Pool().

nextfree

int Pool::nextfree

protected

Definition at line 68 of file bufpool.h.

Referenced by clear(), grow(), new_buffer(), and Pool().

nextsize

int Pool::nextsize

protected

Definition at line 67 of file bufpool.h.

Referenced by clear(), grow(), and Pool().

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

• dll/opengl/glu32/src/libnurbs/internals/bufpool.h
• dll/opengl/glu32/src/libnurbs/internals/bufpool.cc