![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ipc_subsystem.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / osfmk / kern|
Return to ipc_subsystem.c CVS log | Up to [Apple XNU] / XNU / osfmk / kern |
1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.1.1.1 1998/09/22 21:05:34 wsanchez
29: * Import of Mac OS X kernel (~semeria)
30: *
31: * Revision 1.2 1998/04/29 17:35:56 mburg
32: * MK7.3 merger
33: *
34: * Revision 1.1.10.1 1998/02/03 09:28:28 gdt
35: * Merge up to MK7.3
36: * [1998/02/03 09:13:40 gdt]
37: *
38: * Revision 1.1.8.1 1997/06/17 02:57:46 devrcs
39: * Added `ipc_subsystem_terminate().'
40: * [1997/03/18 18:25:52 rkc]
41: *
42: * Revision 1.1.5.1 1994/09/23 02:19:57 ezf
43: * change marker to not FREE
44: * [1994/09/22 21:33:39 ezf]
45: *
46: * Revision 1.1.3.1 1994/01/20 11:05:46 emcmanus
47: * Copied for submission.
48: * [1994/01/20 11:04:25 emcmanus]
49: *
50: * Revision 1.1.1.2 1994/01/13 02:40:32 condict
51: * IPC support for the RPC subsytem object (server co-location).
52: *
53: * $EndLog$
54: */
55:
56: /*
57: * File: kern/ipc_subsystem.c
58: * Purpose: Routines to support ipc semantics of new kernel
59: * RPC subsystem descriptions
60: */
61:
62: #include <mach/message.h>
63: #include <kern/ipc_kobject.h>
64: #include <kern/task.h>
65: #include <kern/ipc_subsystem.h>
66: #include <kern/subsystem.h>
67: #include <kern/misc_protos.h>
68: #include <ipc/ipc_port.h>
69: #include <ipc/ipc_space.h>
70:
71: /*
72: * Routine: ipc_subsystem_init
73: * Purpose:
74: * Initialize ipc control of a subsystem.
75: */
76: void
77: ipc_subsystem_init(
78: subsystem_t subsystem)
79: {
80: ipc_port_t port;
81:
82: port = ipc_port_alloc_kernel();
83: if (port == IP_NULL)
84: panic("ipc_subsystem_init");
85: subsystem->ipc_self = port;
86: }
87:
88: /*
89: * Routine: ipc_subsystem_enable
90: * Purpose:
91: * Enable ipc access to a subsystem.
92: */
93: void
94: ipc_subsystem_enable(
95: subsystem_t subsystem)
96: {
97: ipc_kobject_set(subsystem->ipc_self,
98: (ipc_kobject_t) subsystem, IKOT_SUBSYSTEM);
99: }
100:
101:
102: /*
103: * Routine: ipc_subsystem_disable
104: * Purpose:
105: * Disable IPC access to a subsystem.
106: * Conditions:
107: * Nothing locked.
108: */
109:
110: void
111: ipc_subsystem_disable(
112: subsystem_t subsystem)
113: {
114: ipc_port_t kport;
115:
116: kport = subsystem->ipc_self;
117: if (kport != IP_NULL)
118: ipc_kobject_set(kport, IKO_NULL, IKOT_NONE);
119: }
120:
121: /*
122: * Routine: ipc_subsystem_terminate
123: * Purpose:
124: * Clean up and destroy a subsystem's IPC state.
125: */
126: void
127: ipc_subsystem_terminate(
128: subsystem_t subsystem)
129: {
130: ipc_port_dealloc_kernel(subsystem->ipc_self);
131: }
132:
133:
134: /*
135: * Routine: convert_port_to_subsystem
136: * Purpose:
137: * Convert from a port to a subsystem.
138: * Doesn't consume the port ref; produces a subsystem ref,
139: * which may be null.
140: * Conditions:
141: * Nothing locked.
142: */
143: subsystem_t
144: convert_port_to_subsystem(
145: ipc_port_t port)
146: {
147: subsystem_t subsystem = SUBSYSTEM_NULL;
148:
149: if (IP_VALID(port)) {
150: ip_lock(port);
151: if (ip_active(port) &&
152: (ip_kotype(port) == IKOT_SUBSYSTEM)) {
153: subsystem = (subsystem_t) port->ip_kobject;
154: }
155: ip_unlock(port);
156: }
157: return (subsystem);
158: }
159:
160:
161: /*
162: * Routine: convert_subsystem_to_port
163: * Purpose:
164: * Convert from a subsystem to a port.
165: * Produces a naked send right which may be invalid.
166: * Conditions:
167: * Nothing locked.
168: */
169: ipc_port_t
170: convert_subsystem_to_port(
171: subsystem_t subsystem)
172: {
173: ipc_port_t port;
174:
175: port = ipc_port_make_send(subsystem->ipc_self);
176: return (port);
177: }
178:
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.