Argox PA-20 Programming Guide Manuale Utente Scaricare il pdf (Pagina 102)

PT-20 Programming Guide

100

Memory

Tfree

Purpose：

Use the Tfree to release an allocated storage block to the pool of free

memory.

Syntax：

void Tfree(void *mem_address);

Example call：

Tfree(buffer);

Includes：

#include “SDK.h”

Description：

The Tfree function returns to the pool of free memory a blockof memory

that was allocated earlier by Tmalloc. The address of the block is specified

by the argument mem_address, which is a pointer to the starting byte of the

block. A NULL pointer argument is ignored by Tfree.

Returns：

None

Tmalloc

Purpose：

Use Tmalloc to allocate memory for an array of a given number of bytes,

not exceeding 256KB.

Syntax：

void* Tmalloc(U32 num_bytes);

Example call：

buffer = (char *)Tmalloc(100*sizeof(char));

Includes：

#include “SDK.h”

Description：

The Tmalloc function allocates the number of bytes requested in the

argument num_bytes by calling internal Turbo C heap management

routines. The Tmalloc function will work properly for all memory models.

Returns：

The Tmalloc function returns a pointer that is the starting address of the

memory allocated. The allocated memory is properly aligned (the address

of the first byte meets the requirements for storing any type of C variable). If

the memory allocation is unsuccessful because of insufficient space or bad

values of the arguments, a NULL is returned.

Comments：

Note that when using Tmolloc to allocate storage for a specific data type,

you should cast the returned void pointer to that type.

TotalHeapSize

Purpose：

Checking the total heap size.

Syntax：

int TotalHeapSize(void);

Example call：

totalsize = TotalHeapSize();

Includes：

#include “SDK.h ”

Description：

The TotalHeapSize function can get the total heap size.

Returns：

The total heap size in units of Kbytes.

UsedHeapSize

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