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3.2.2.12 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 *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.