1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * @OSF_COPYRIGHT@
30 *
31 */
32
33#include <kern/sync_sema.h>
34#include <kern/sync_lock.h>
35#include <kern/ipc_kobject.h>
36#include <kern/ipc_sync.h>
37#include <ipc/port.h>
38#include <ipc/ipc_space.h>
39#include <ipc/ipc_port.h>
40#include <mach/semaphore.h>
41#include <mach/lock_set_server.h>
42#include <mach/mach_port_server.h>
43#include <mach/port.h>
44
45
46kern_return_t
47port_name_to_semaphore(
48	mach_port_name_t 	name,
49	semaphore_t 		*semaphorep)
50{
51	semaphore_t semaphore;
52	ipc_port_t kern_port;
53	kern_return_t kr;
54
55	if (!MACH_PORT_VALID(name)) {
56		*semaphorep = SEMAPHORE_NULL;
57		return KERN_INVALID_NAME;
58	}
59
60	kr = ipc_object_translate(current_space(), name, MACH_PORT_RIGHT_SEND,
61				  (ipc_object_t *) &kern_port);
62	if (kr != KERN_SUCCESS) {
63		*semaphorep = SEMAPHORE_NULL;
64		return kr;
65	}
66	/* have the port locked */
67	assert(IP_VALID(kern_port));
68
69	if (!ip_active(kern_port) || (ip_kotype(kern_port) != IKOT_SEMAPHORE)) {
70		ip_unlock(kern_port);
71		*semaphorep = SEMAPHORE_NULL;
72		return KERN_INVALID_ARGUMENT;
73	}
74
75	semaphore = (semaphore_t) kern_port->ip_kobject;
76	assert(semaphore != SEMAPHORE_NULL);
77	semaphore_reference(semaphore);
78	ip_unlock(kern_port);
79
80	*semaphorep = semaphore;
81	return KERN_SUCCESS;
82}
83
84semaphore_t
85convert_port_to_semaphore (ipc_port_t port)
86{
87	semaphore_t semaphore = SEMAPHORE_NULL;
88
89	if (IP_VALID (port)) {
90		ip_lock(port);
91		if (ip_active(port) && (ip_kotype(port) == IKOT_SEMAPHORE)) {
92			semaphore = (semaphore_t) port->ip_kobject;
93			semaphore_reference(semaphore);
94		}
95		ip_unlock(port);
96	}
97
98	return (semaphore);
99}
100
101
102ipc_port_t
103convert_semaphore_to_port (semaphore_t semaphore)
104{
105	ipc_port_t port;
106
107	if (semaphore == SEMAPHORE_NULL)
108		return (IP_NULL);
109
110	/* caller is donating a reference */
111	port = ipc_port_make_send(semaphore->port);
112	semaphore_dereference(semaphore);
113	return (port);
114}
115
116lock_set_t
117convert_port_to_lock_set (__unused ipc_port_t port)
118{
119	return (LOCK_SET_NULL);
120}
121
122ipc_port_t
123convert_lock_set_to_port (__unused lock_set_t lock_set)
124{
125	return (IP_NULL);
126}
127
128