source/glue/src/glue_memory.c File Reference

Implement the system dependend memory functions. More...

#include <stdlib.h>
#include <string.h>
#include "stb_os.h"
#include "glue_debug.h"
#include "glue_memory.h"

Data Structures
struct	s_strings_block
Defines
#define	MallocFunc   STB_MemAlloc
#define	FreeFunc   STB_MemFree
#define	MAX_BLK_STRS   0x80 /* 128 memory blocks */
#define	VTINY_BITS   2
#define	MIGIT_BITS   3
#define	SMALL_BITS   4
#define	MEDUM_BITS   5
#define	LARGE_BITS   6
#define	STR_DATA_SIZE(bz)   (MAX_BLK_STRS << bz)
#define	STR_BLCK_SIZE(bz)   STR_DATA_SIZE(bz) + sizeof(S_STRINGS_BLOCK)
#define	CONTROL_SIZE   (MAX_BLK_STRS >> 3)
#define	BlkStrFree(head, bz, data)
#define	theMemSize   size
#define	BlkStrAlloc(bk, bz, ln)   BlkStrAlloc(bk, bz)
Typedefs
typedef struct s_strings_block	S_STRINGS_BLOCK
Functions
void	MHEG5freeMemFunc (void *what)
	Free some memory allocated by a call to MHEG5getMemFunc.
void *	MHEG5getMemFunc (int size)
	Allocate a block of memory from the free pool. This function should be called using the macro MHEG5getMem. This ensures that the callingFunction parameter is only passed in when MHEG5LOG is defined.
void	STR_Shutdown (void)
void	STR_TidyUp (void)
unsigned char *	STR_DataAlloc (unsigned int len)
void	STR_DataFree (unsigned char *data, unsigned int len)
void	MHG_DebugMemStats (int line)
BOOLEAN	MH5GlueMemoryInitialise (void)
void	MH5GlueMemoryTerminate (void)
S_STRING	MH5GlueStringCopy (S_STRING source)
S_STRING	MH5GlueStringConcat (S_STRING src1, S_STRING src2)
S_STRING	MH5GlueStringAlloc (U32BIT size)
S_STRING	MH5GlueStringCreate (U32BIT size, U8BIT *data)
void	MH5GlueStringFree (S_STRING *pStr)
Variables
S_STRINGS_BLOCK *	vtiny_strmem_head = NULL
S_STRINGS_BLOCK *	migit_strmem_head = NULL
S_STRINGS_BLOCK *	small_strmem_head = NULL
S_STRINGS_BLOCK *	medum_strmem_head = NULL
S_STRINGS_BLOCK *	large_strmem_head = NULL

---

Detailed Description

Implement the system dependend memory functions.

Date:

05/02/2002

Author:

R.Freeman

---

Define Documentation

#define BlkStrFree	(		head,
			bz,
			data
	)

Value:

{  S_STRINGS_BLOCK *pBlk = head; \
      do { \
         unsigned char *blk_data = (unsigned char *)pBlk + sizeof(S_STRINGS_BLOCK); \
         if (data >= blk_data \
             && data < blk_data + STR_DATA_SIZE(bz)) \
         {  int tmp; \
            tmp = (data - blk_data) >> bz; \
            pBlk->control[tmp >> 3] &= (U8BIT) ~(1 << (tmp & 7)); \
            break; \
         } \
         pBlk = pBlk->next; \
      } while (pBlk != NULL); \
      if (pBlk == NULL) { TRACE(TERROR, ("Not freed %x", data)) } \
   }

---

Function Documentation

void MHEG5freeMemFunc

(

void *

what

)

Free some memory allocated by a call to MHEG5getMemFunc.

Parameters:

what	Pointer to allocated memory.

Returns:

void

void* MHEG5getMemFunc

(

int

size

)

Allocate a block of memory from the free pool. This function should be called using the macro MHEG5getMem. This ensures that the callingFunction parameter is only passed in when MHEG5LOG is defined.

Parameters:

callingFunction	Pointer to the calling function (only when MHEG5LOG is defined).
size	Size in bytes of the memory region to allocate.

Returns:

Pointer to allocated memory, or NULL if allocation fails.