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/* class-create.c - Create a capability class.
Copyright (C) 2004 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. */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <hurd/cap-server.h>
/* Create a new capability class for objects with the size SIZE,
including the struct hurd_cap_obj, which has to be placed at the
beginning of each capability object.
The callback OBJ_INIT is used whenever a capability object in this
class is created. The callback OBJ_REINIT is used whenever a
capability object in this class is deallocated and returned to the
slab. OBJ_REINIT should return a capability object that is not
used anymore into the same state as OBJ_INIT does for a freshly
allocated object. OBJ_DESTROY should deallocate all resources for
this capablity object. Note that if OBJ_INIT or OBJ_REINIT fails,
the object is considered to be fully destroyed. No extra call to
OBJ_DESTROY will be made for such objects.
The new capability class is returned in R_CLASS. If the creation
fails, an error value will be returned. */
error_t
hurd_cap_class_create (size_t size, size_t alignment,
hurd_cap_obj_init_t obj_init,
hurd_cap_obj_alloc_t obj_alloc,
hurd_cap_obj_reinit_t obj_reinit,
hurd_cap_obj_destroy_t obj_destroy,
hurd_cap_class_demuxer_t demuxer,
hurd_cap_class_t *r_class)
{
error_t err;
hurd_cap_class_t cap_class = malloc (sizeof (struct hurd_cap_class));
if (!cap_class)
return errno;
err = hurd_cap_class_init (cap_class, size, alignment, obj_init, obj_alloc,
obj_reinit, obj_destroy, demuxer);
if (err)
{
free (cap_class);
return err;
}
*r_class = cap_class;
return 0;
}
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