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/* Copy a mom port reference
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "priv.h"
error_t
mom_copy_ref (struct mom_port_ref *new,
struct mom_port_ref *obj)
{
error_t err;
new->lock = SPIN_LOCK_INITIALIZER;
spin_lock (&obj->lock);
assert (obj->refcnt);
err = mach_port_mod_refs (mach_task_self (),
obj->port, MACH_PORT_RIGHT_SEND, 1);
new->port = obj->port;
spin_unlock (&obj->lock);
if (err)
return err;
new->refcnt = 1;
return 0;
}
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