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MemMan.hpp File Reference

#include <string.h>
#include "Error.hpp"

Go to the source code of this file.

Defines

#define BLOCKSIZE_NUM   4
#define LARGEBLOCK_SIZE   65536
#define MEDIUMBLOCK_SIZE   8192
#define SMALLBLOCK_SIZE   1024
#define TINYBLOCK_SIZE   256

Functions

char * AllocateBlockRecurs (unsigned char blocksizeidx)
char * AllocateBlock (unsigned char blocksizeidx)
void FreeBlock (char *ptr, unsigned char blocksizeidx)
unsigned long GetBlockSize (unsigned char blocksizeidx)

Variables

unsigned long blocksizes []
char * freeblocklists []
unsigned long allocatedmemory

Define Documentation

#define BLOCKSIZE_NUM   4
 

Definition at line 37 of file MemMan.hpp.

#define LARGEBLOCK_SIZE   65536
 

Definition at line 39 of file MemMan.hpp.

#define MEDIUMBLOCK_SIZE   8192
 

Definition at line 40 of file MemMan.hpp.

#define SMALLBLOCK_SIZE   1024
 

Definition at line 41 of file MemMan.hpp.

#define TINYBLOCK_SIZE   256
 

Definition at line 42 of file MemMan.hpp.

Function Documentation

char* AllocateBlock (  unsigned char    blocksizeidx )  [inline]
 

Definition at line 63 of file MemMan.hpp.

00066 {
00067    allocatedmemory+=blocksizes[blocksizeidx];
00068    return AllocateBlockRecurs(blocksizeidx);
00069 }

char* AllocateBlockRecurs (  unsigned char    blocksizeidx ) 
 

Definition at line 51 of file MemMan.cpp.

00055 {
00056    char *ptr;
00057 
00058    // Do we have any free block?
00059    if(freeblocklists[blocksizeidx]!=NULL)
00060    {
00061       ptr=freeblocklists[blocksizeidx];
00062       freeblocklists[blocksizeidx]=*(char **)freeblocklists[blocksizeidx];
00063       return ptr;
00064    }
00065    else
00066    {
00067       if(blocksizeidx==BLOCKSIZE_NUM-1)
00068          // Is this the largest possible block size??
00069          // We must allocate new space!
00070       {
00071          ptr=(char *)malloc(blocksizes[blocksizeidx]);
00072          if(ptr==NULL)
00073             ExitNoMem();
00074 
00075          return ptr;
00076       }
00077       else  // If we haven't reached the largest possible block size,
00078             // We allocate a block of the next larger block size
00079             // and use it as a container for our blocks
00080       {
00081          ptr=AllocateBlockRecurs(blocksizeidx+1);
00082 
00083          // We add the new blocks to the free list
00084          char  *ptr1=ptr+blocksizes[blocksizeidx],
00085                *endptr=ptr+blocksizes[blocksizeidx+1];
00086 
00087          do
00088          {
00089             *(char **)ptr1=freeblocklists[blocksizeidx];
00090             freeblocklists[blocksizeidx]=ptr1;
00091 
00092             ptr1+=blocksizes[blocksizeidx];
00093          }
00094          while(ptr1<endptr);
00095 
00096          return ptr;
00097       }
00098    }
00099 }

void FreeBlock (  char *    ptr,
unsigned char    blocksizeidx
)  [inline]
 

Definition at line 71 of file MemMan.hpp.

00073 {
00074    *(char **)ptr=freeblocklists[blocksizeidx];
00075    freeblocklists[blocksizeidx]=ptr;
00076 
00077 #ifdef RELEASEMEM_SAFE
00078    memset(ptr+4,0xcd,blocksizes[blocksizeidx]-4);
00079 #endif
00080 
00081    allocatedmemory-=blocksizes[blocksizeidx];
00082 }

unsigned long GetBlockSize (  unsigned char    blocksizeidx )  [inline]
 

Definition at line 84 of file MemMan.hpp.

00086 {
00087    return blocksizes[blocksizeidx];
00088 }

Variable Documentation

unsigned long allocatedmemory
 

Definition at line 56 of file MemMan.hpp.

unsigned long blocksizes[]
 

Definition at line 44 of file MemMan.hpp.

char* freeblocklists[]
 

Definition at line 47 of file MemMan.hpp.

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