malloc_zone_malloc(3) BSD Library Functions Manual malloc_zone_malloc(3)
NAME
malloc_create_zone, malloc_destroy_zone, malloc_default_zone,
malloc_zone_from_ptr, malloc_zone_malloc, malloc_zone_calloc,
malloc_zone_valloc, malloc_zone_realloc, malloc_zone_memalign,
malloc_zone_free -- zone-based memory allocation
SYNOPSIS
#include <malloc/malloc.h>
malloc_zone_t *
malloc_create_zone(vm_size_t start_size, unsigned flags);
void
malloc_destroy_zone(malloc_zone_t *zone);
malloc_zone_t *
malloc_default_zone(void);
malloc_zone_t *
malloc_zone_from_ptr(const void *ptr);
void *
malloc_zone_malloc(malloc_zone_t *zone, size_t size);
void *
malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size);
void *
malloc_zone_valloc(malloc_zone_t *zone, size_t size);
void *
malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size);
void *
malloc_zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size);
void
malloc_zone_free(malloc_zone_t *zone, void *ptr);
DESCRIPTION
The malloc_create_zone() function creates a malloc zone, advising an ini-
tial allocation of start_size bytes, and specifying flags The returned
malloc zone can be used to provide custom allocation and deallocation
behavior, and to retrieve additional information about the allocations in
that zone. At present there are no client settable flag values recog-
nized by malloc_create_zone(), the flags argument should always be passed
as zero.
The malloc_destroy_zone() function deallocates all memory associated with
objects in zone as well as zone itself.
The malloc_default_zone() function returns the default system malloc
zone, used by malloc(3), and free(3).
The malloc_zone_from_ptr() function returns a pointer to the malloc zone
which contains ptr or NULL, if the pointer does not point to an allocated
object in any current malloc zone.
The malloc_zone_malloc(), malloc_zone_calloc(), malloc_zone_valloc(),
malloc_zone_realloc(), malloc_zone_memalign(), and malloc_zone_free()
perform the same task on zone as their non-prefixed variants, malloc(3),
calloc(3), valloc(3), realloc(3), posix_memalign(3), and free(3) perform
on the default system malloc zone.
RETURN VALUES
The malloc_create_zone(), malloc_default_zone(), and
malloc_zone_from_ptr() functions return a pointer to a malloc_zone_t
structure, or NULL if there was an error.
The malloc_zone_malloc(), malloc_zone_calloc(), malloc_zone_valloc(),
malloc_zone_realloc(), and malloc_zone_memalign() functions return a
pointer to allocated memory. If there is an error, they return a NULL
pointer. They are not required to set errno.
SEE ALSO
malloc(3), posix_memalign(3)
BSD Aug 13, 2008 BSD
Mac OS X 10.9.1 - Generated Wed Jan 8 19:38:50 CST 2014