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/*
Copyright (C) 1995,96,2000 Free Software Foundation, Inc.
Written by Michael I. Bushnell.
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 "ports.h"
#include <cthreads.h>
#include <mach/notify.h>
#include <assert.h>
mach_port_t
ports_get_right (void *port)
{
struct port_info *pi = port;
mach_port_t foo;
error_t err;
mutex_lock (&_ports_lock);
if (pi->port_right == MACH_PORT_NULL)
{
mutex_unlock (&_ports_lock);
return MACH_PORT_NULL;
}
pi->mscount++;
if ((pi->flags & PORT_HAS_SENDRIGHTS) == 0)
{
pi->flags |= PORT_HAS_SENDRIGHTS;
pi->refcnt++;
err = mach_port_request_notification (mach_task_self (),
pi->port_right,
MACH_NOTIFY_NO_SENDERS,
pi->mscount,
pi->port_right,
MACH_MSG_TYPE_MAKE_SEND_ONCE,
&foo);
assert_perror (err);
if (foo != MACH_PORT_NULL)
mach_port_deallocate (mach_task_self (), foo);
}
mutex_unlock (&_ports_lock);
return pi->port_right;
}
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