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-.\" Copyright (c) 2008 Apple, Inc.  All rights reserved.
-.\"
-.\" @APPLE_LICENSE_HEADER_START@
-.\"
-.\" The contents of this file constitute Original Code as defined in and
-.\" are subject to the Apple Public Source License Version 1.1 (the
-.\" "License").  You may not use this file except in compliance with the
-.\" License.  Please obtain a copy of the License at
-.\" http://www.apple.com/publicsource and read it before using this file.
-.\"
-.\" This Original Code and all software distributed under the License are
-.\" distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
-.\" EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
-.\" INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
-.\" FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
-.\" License for the specific language governing rights and limitations
-.\" under the License.
-.\"
-.\" @APPLE_LICENSE_HEADER_END@
-.\"
-.Dd Aug 13, 2008
-.Dt MALLOC_ZONE_MALLOC 3
-.Os
-.Sh NAME
-.Nm malloc_create_zone ,
-.Nm malloc_destroy_zone ,
-.Nm malloc_default_zone ,
-.Nm malloc_zone_from_ptr ,
-.Nm malloc_zone_malloc ,
-.Nm malloc_zone_calloc ,
-.Nm malloc_zone_valloc ,
-.Nm malloc_zone_realloc ,
-.Nm malloc_zone_memalign ,
-.Nm malloc_zone_free
-.Nd zone-based memory allocation
-.Sh SYNOPSIS
-.In malloc/malloc.h
-.Ft malloc_zone_t *
-.Fo malloc_create_zone
-.Fa "vm_size_t start_size"
-.Fa "unsigned flags"
-.Fc
-.Ft void
-.Fo malloc_destroy_zone
-.Fa "malloc_zone_t *zone"
-.Fc
-.Ft malloc_zone_t *
-.Fo malloc_default_zone
-.Fa void
-.Fc
-.Ft malloc_zone_t *
-.Fo malloc_zone_from_ptr
-.Fa "const void *ptr"
-.Fc
-.Ft void *
-.Fo malloc_zone_malloc
-.Fa "malloc_zone_t *zone"
-.Fa "size_t size"
-.Fc
-.Ft void *
-.Fo malloc_zone_calloc
-.Fa "malloc_zone_t *zone"
-.Fa "size_t num_items"
-.Fa "size_t size"
-.Fc
-.Ft void *
-.Fo malloc_zone_valloc
-.Fa "malloc_zone_t *zone"
-.Fa "size_t size"
-.Fc
-.Ft void *
-.Fo malloc_zone_realloc
-.Fa "malloc_zone_t *zone"
-.Fa "void *ptr"
-.Fa "size_t size"
-.Fc
-.Ft void *
-.Fo malloc_zone_memalign
-.Fa "malloc_zone_t *zone"
-.Fa "size_t alignment"
-.Fa "size_t size"
-.Fc
-.Ft void
-.Fo malloc_zone_free
-.Fa "malloc_zone_t *zone"
-.Fa "void *ptr"
-.Fc
-.Sh DESCRIPTION
-The
-.Fn malloc_create_zone
-function creates a malloc zone, advising an initial allocation of
-.Fa start_size
-bytes, and specifying 
-.Fa 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 recognized by malloc_create_zone(),
-the flags argument should always be passed as zero.
-.Pp
-The
-.Fn malloc_destroy_zone
-function deallocates all memory associated with objects in 
-.Fa zone
-as well as 
-.Fa zone
-itself.
-.Pp
-The
-.Fn malloc_default_zone
-function returns the default system malloc zone, used by
-.Xr malloc 3 ,
-and
-.Xr free 3 .
-.Pp
-The
-.Fn malloc_zone_from_ptr
-function returns a pointer to the malloc zone which contains
-.Fa ptr
-or NULL, if the pointer does not point to an allocated object in any current
-malloc zone.
-.Pp
-The
-.Fn malloc_zone_malloc ,
-.Fn malloc_zone_calloc ,
-.Fn malloc_zone_valloc ,
-.Fn malloc_zone_realloc ,
-.Fn malloc_zone_memalign ,
-and
-.Fn malloc_zone_free
-perform the same task on
-.Fa zone
-as their non-prefixed variants, 
-.Xr malloc 3 ,
-.Xr calloc 3 ,
-.Xr valloc 3 ,
-.Xr realloc 3 ,
-.Xr posix_memalign 3 ,
-and 
-.Xr free 3 perform on the default system malloc zone.
-.Sh RETURN VALUES
-The 
-.Fn malloc_create_zone ,
-.Fn malloc_default_zone ,
-and
-.Fn malloc_zone_from_ptr
-functions return a pointer to a malloc_zone_t structure, or NULL if there was
-an error.
-.Pp
-The 
-.Fn malloc_zone_malloc ,
-.Fn malloc_zone_calloc ,
-.Fn malloc_zone_valloc ,
-.Fn malloc_zone_realloc ,
-and
-.Fn 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 
-.Va errno .
-.El
-.Sh SEE ALSO
-.Xr malloc 3 ,
-.Xr posix_memalign 3