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 | * File: kern/ipc_clock.c |
33 | * Purpose: Routines to support ipc semantics of new kernel |
34 | * alarm clock facility. |
35 | */ |
36 | |
37 | #include <mach/message.h> |
38 | #include <kern/host.h> |
39 | #include <kern/processor.h> |
40 | #include <kern/task.h> |
41 | #include <kern/thread.h> |
42 | #include <kern/ipc_host.h> |
43 | #include <kern/ipc_kobject.h> |
44 | #include <kern/clock.h> |
45 | #include <kern/misc_protos.h> |
46 | #include <ipc/ipc_port.h> |
47 | #include <ipc/ipc_space.h> |
48 | |
49 | IPC_KOBJECT_DEFINE(IKOT_CLOCK, |
50 | .iko_op_stable = true, |
51 | .iko_op_permanent = true); |
52 | |
53 | /* |
54 | * Routine: ipc_clock_init |
55 | * Purpose: |
56 | * Initialize ipc control of a clock. |
57 | */ |
58 | void |
59 | ipc_clock_init(clock_t clock) |
60 | { |
61 | clock->cl_service = ipc_kobject_alloc_port(kobject: clock, type: IKOT_CLOCK, |
62 | options: IPC_KOBJECT_ALLOC_NONE); |
63 | } |
64 | |
65 | /* |
66 | * Routine: convert_port_to_clock |
67 | * Purpose: |
68 | * Convert from a port to a clock. |
69 | * Doesn't consume the port ref |
70 | * which may be null. |
71 | * Conditions: |
72 | * Nothing locked. |
73 | */ |
74 | clock_t |
75 | convert_port_to_clock(ipc_port_t port) |
76 | { |
77 | clock_t clock = CLOCK_NULL; |
78 | |
79 | if (IP_VALID(port)) { |
80 | clock = ipc_kobject_get_stable(port, type: IKOT_CLOCK); |
81 | } |
82 | |
83 | return clock; |
84 | } |
85 | |
86 | /* |
87 | * Routine: convert_clock_to_port |
88 | * Purpose: |
89 | * Convert from a clock to a port. |
90 | * Produces a naked send right which may be invalid. |
91 | * Conditions: |
92 | * Nothing locked. |
93 | */ |
94 | ipc_port_t |
95 | convert_clock_to_port(clock_t clock) |
96 | { |
97 | return ipc_kobject_make_send(port: clock->cl_service, kobject: clock, kotype: IKOT_CLOCK); |
98 | } |
99 | |
100 | /* |
101 | * Routine: port_name_to_clock |
102 | * Purpose: |
103 | * Convert from a clock name to a clock pointer. |
104 | */ |
105 | clock_t |
106 | port_name_to_clock(mach_port_name_t clock_name) |
107 | { |
108 | clock_t clock = CLOCK_NULL; |
109 | ipc_space_t space; |
110 | ipc_port_t port; |
111 | |
112 | if (clock_name == 0) { |
113 | return clock; |
114 | } |
115 | space = current_space(); |
116 | if (ipc_port_translate_send(space, name: clock_name, portp: &port) != KERN_SUCCESS) { |
117 | return clock; |
118 | } |
119 | clock = (clock_t)ipc_kobject_get_stable(port, type: IKOT_CLOCK); |
120 | ip_mq_unlock(port); |
121 | return clock; |
122 | } |
123 | |