The GNU C Library - Summary of Malloc

Summary of malloc -Related Functions

Here is a summary of the functions that work with malloc :

void *malloc (size_t size)

Allocate a block of size bytes. See Basic Allocation.

void free (void *addr)

Free a block previously allocated by malloc . See Freeing after Malloc.

void *realloc (void *addr, size_t size)

Make a block previously allocated by malloc larger or smaller, possibly by copying it to a new location. See Changing Block Size.

void *calloc (size_t count, size_t eltsize)

Allocate a block of count * eltsize bytes using malloc , and set its contents to zero. See Allocating Cleared Space.

void *valloc (size_t size)

Allocate a block of size bytes, starting on a page boundary. See Aligned Memory Blocks.

void *memalign (size_t size, size_t boundary)

Allocate a block of size bytes, starting on an address that is a multiple of boundary. See Aligned Memory Blocks.

int mcheck (void (*abortfn) (void))

Tell malloc to perform occasional consistency checks on dynamically allocated memory, and to call abortfn when an inconsistency is found. See Heap Consistency Checking.

void *(*__malloc_hook) (size_t size)

A pointer to a function that malloc uses whenever it is called.

void *(*__realloc_hook) (void *ptr, size_t size)

A pointer to a function that realloc uses whenever it is called.

void (*__free_hook) (void *ptr)

A pointer to a function that free uses whenever it is called.

struct mstats mstats (void)

Return information about the current dynamic memory usage. See Statistics of Malloc.