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/* class-alloc.c - Allocate a capability object.
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 <hurd/slab.h>
#include <hurd/cap-server.h>
/* Allocate a new capability object in the class CAP_CLASS. The new
capability object is locked and has one reference. It will be
returned in R_OBJ. If the allocation fails, an error value will be
returned. */
error_t
hurd_cap_class_alloc (hurd_cap_class_t cap_class, hurd_cap_obj_t *r_obj)
{
error_t err;
void *new_obj;
hurd_cap_obj_t obj;
err = hurd_slab_alloc (&cap_class->obj_space, &new_obj);
if (err)
return err;
obj = new_obj;
/* Let the user do their extra initialization. */
if (cap_class->obj_alloc)
{
err = (*cap_class->obj_alloc) (cap_class, obj);
if (err)
{
hurd_slab_dealloc (&cap_class->obj_space, obj);
return err;
}
}
/* Now take the lock. */
hurd_cap_obj_lock (obj);
*r_obj = obj;
return 0;
}
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