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3.2.3.10 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 Memory Allocation.

void free (void *addr)

Free a block previously allocated by malloc. See Freeing Memory Allocated with 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 the Size of a Block.

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 the Size of a Block.

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 Allocating 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 Allocating 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 Allocating 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 Allocating 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.

struct mallinfo2 mallinfo2 (void)

Return information about the current dynamic memory usage. See Statistics for Memory Allocation with malloc.