1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
Copyright (C) 1995 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>
mach_port_t
ports_get_right (void *port)
{
struct port_info *pi = port;
mach_port_t foo;
mutex_lock (&_ports_lock);
pi->mscount++;
if (pi->flags & PORT_HAS_SENDRIGHTS == 0)
{
pi->flags |= PORT_HAS_SENDRIGHTS;
pi->refcnt++;
mach_port_request_notification (mach_task_self (), pi->port_right,
MACH_NOTIFY_NO_SENDERS, 1,
pi->port_right,
MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
if (foo != MACH_PORT_NULL)
mach_port_deallocate (mach_task_self (), foo);
}
mutex_unlock (&_ports_lock);
return pi->port_right;
}
|
