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/* slab.h - The GNU Hurd slab allocator interface.
Copyright (C) 2003 Free Software Foundation, Inc.
Written by Marcus Brinkmann <marcus@gnu.org>
This file is part of the GNU Hurd.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _HURD_SLAB_H
#define _HURD_SLAB_H 1
#include <errno.h>
/* A slab space is an opaque type. */
struct hurd_slab_space;
typedef struct hurd_slab_space *hurd_slab_space_t;
/* Initialize the slab object pointed to by BUFFER. HOOK is as
provided to hurd_slab_create. */
typedef error_t (*hurd_slab_constructor_t) (void *hook, void *buffer);
/* Destroy the slab object pointed to by BUFFER. HOOK is as provided
to hurd_slab_create. */
typedef void (*hurd_slab_destructor_t) (void *hook, void *buffer);
/* Create a new slab space with the given object size, alignment,
constructor and destructor. ALIGNMENT can be zero. HOOK is passed
as the first argument to the constructor and destructor. */
error_t hurd_slab_create (size_t size, size_t alignment,
hurd_slab_constructor_t constructor,
hurd_slab_destructor_t destructor,
void *hook,
hurd_slab_space_t *space);
/* Allocate a new object from the slab space SPACE. */
error_t hurd_slab_alloc (hurd_slab_space_t space, void **buffer);
/* Deallocate the object BUFFER from the slab space SPACE. */
void hurd_slab_dealloc (hurd_slab_space_t space, void *buffer);
/* Release unused memory. */
error_t hurd_slab_reap (void);
#endif /* _HURD_SLAB_H */
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