malloc_zone_malloc man page on Darwin

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     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

     #include <malloc/malloc.h>

     malloc_zone_t *
     malloc_create_zone(vm_size_t start_size, unsigned flags);

     malloc_destroy_zone(malloc_zone_t *zone);

     malloc_zone_t *

     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);

     malloc_zone_free(malloc_zone_t *zone, void *ptr);

     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.

     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.

     malloc(3), posix_memalign(3)

BSD				 Aug 13, 2008				   BSD

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