FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_kmsg.h
1 /*
2 * Mach Operating System
3 * Copyright (c) 1993 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: kern_kmsg.h,v $
29 * Revision 2.2 93/11/17 17:13:18 dbg
30 * Created.
31 * [93/03/29 dbg]
32 *
33 */
34
35 /*
36 * File: kern/kern_kmsg.h
37 * Author: David Golub, 1993
38 *
39 * Routines for allocating and freeing reply messages from
40 * the kernel IPC interface.
41 */
42
43 #ifndef _KERN_KERN_KMSG_H_
44 #define _KERN_KERN_KMSG_H_
45
46 #include <ipc/ipc_kmsg.h>
47 #include <kern/macro_help.h>
48 #include <kern/zalloc.h>
49
50 /*
51 * Kernel reply kmsg allocation.
52 */
53
54 extern zone_t kernel_reply_kmsg_zone;
55
56 extern void kernel_reply_kmsg_init(void);
57
58 #define kernel_reply_kmsg_get(kmsg) \
59 MACRO_BEGIN \
60 (kmsg) = ((ipc_kmsg_t) zalloc(kernel_reply_kmsg_zone)); \
61 if ((kmsg) != IKM_NULL) \
62 ikm_init_special((kmsg), IKM_SIZE_KERN_REPLY); \
63 MACRO_END
64
65 #define kernel_reply_kmsg_put(kmsg) \
66 MACRO_BEGIN \
67 ikm_check_initialized((kmsg), IKM_SIZE_KERN_REPLY); \
68 zfree(kernel_reply_kmsg_zone, (vm_offset_t)(kmsg)); \
69 MACRO_END
70
71 #endif /* _KERN_KERN_KMSG_H_ */
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