3.2.3.11 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 *reallocarray (void *ptr, size_t nmemb, size_t size)

Change the size of a block previously allocated by malloc to nmemb * size bytes as with realloc. 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 *aligned_alloc (size_t size, size_t alignment)

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

int posix_memalign (void **memptr, size_t alignment, size_t size)

Allocate a block of size bytes, starting on an address that is a multiple of alignment. 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 mallopt (int param, int value)

Adjust a tunable parameter. See Malloc Tunable Parameters.

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, const void *caller)

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

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

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

void (*__free_hook) (void *ptr, const void *caller)

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

void (*__memalign_hook) (size_t size, size_t alignment, const void *caller)

A pointer to a function that aligned_alloc, memalign, posix_memalign and valloc use whenever they are called.

struct mallinfo mallinfo (void)

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