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/* Store cloning
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <string.h>
#include <stdlib.h>
#include "store.h"
/* Return in TO a copy of FROM. */
error_t
store_clone (struct store *from, struct store **to)
{
error_t err = 0;
struct store *c =
_make_store (from->class, from->meths, from->port, from->block_size,
from->runs, from->runs_len, from->end);
if (! c)
return ENOMEM;
c->flags = from->flags;
if (from->misc_len)
{
c->misc = malloc (from->misc_len);
if (! c->misc)
err = ENOMEM;
}
if (!err && c->port != MACH_PORT_NULL)
{
err = mach_port_mod_refs (mach_task_self (),
c->port, MACH_PORT_RIGHT_SEND, 1);
if (err)
c->port = MACH_PORT_NULL; /* Don't deallocate it. */
}
if (!err && from->source != MACH_PORT_NULL)
{
err = mach_port_mod_refs (mach_task_self (),
from->source, MACH_PORT_RIGHT_SEND, 1);
if (! err)
c->source = from->source;
}
if (!err && from->meths->clone)
err = (*from->meths->clone)(from, c);
if (err)
store_free (c);
else
*to = c;
return err;
}
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