#include <malloc.h>
int malloc_memcheck(struct malloc_status_st *st)

Arguments

• st is the pointer to the malloc_status_st structure that returns information on the memory allocation area

Return Value
0 is returned if the function execution was normal. In case of any value other than 0, the contents of the malloc_status_st structure are suspect and probably incorrect. For example, if 0 is returned, the size of the entire memory allocation area is recorded in the specified malloc_status_st structure. However, if the size of the entire memory allocation area is reported as 0 in the malloc_status_st structure, then the malloc_status_st contents are incorrect, so the function returns -1 instead of 0.

Explanation
It checks the memory allocation area to see if its condition is normal or abnormal, and acquires information on the used and unused portions of the memory allocation area.

Following are the elements of the malloc_status_st structure:

struct   malloc_status_st   {
int   alMemsize;      /* size of entire memory area */

int   useMemsize;     /* memory size used */
int   useMaxMemSize   /* maximum memory size used */
int   useMinMemSize   /* minimum memory size used */

int   freeMemSize;    /* free memory size */
int   freeMaxMemSize; /* minimum free memory size */
int   freeMinMemSize  /* maximum free memory size */
};

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