1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 *      Copyright (c) 1994, by Sun Microsytems, Inc.
24 */
25
26#ifndef _PRB_INTERNALS_H
27#define	_PRB_INTERNALS_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31/*
32 * Includes
33 */
34
35#include <synch.h>
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41/*
42 * Notes:
43 *
44 * There is a memseg statically allocated in libtnfprobe.  This memory is
45 * consumed by the internal and external probe control fucntions for
46 * initial_final blocks, and compositions.
47 *
48 * There is no mechanism for freeing this memory; it is leaked.  This is
49 * because the overhead involved to protect uses of old memory is too
50 * high for probes.
51 *
52 * The target program internally allocates memory from the bottom edge of
53 * the segment, and the external program allocates from the high edge of
54 * the segment.
55 *
56 * The i_reqsz field is set by the internal memory allocation routine
57 * while it is allocating.  If the external process happens to freeze the
58 * target process while it is in the middle of an internal allocation the
59 * i_reqsz field allows the external process to be extra conservative in
60 * avoiding a memory collision.
61 */
62
63/*
64 * Typedefs
65 */
66
67typedef struct tnf_memseg
68{
69    char *	min_p;		/* points to min free byte */
70    char *	max_p;		/* points past max free byte */
71
72    mutex_t	i_lock;		/* internal sync lock */
73    size_t	i_reqsz;	/* internal request size */
74
75} tnf_memseg_t;
76
77
78/*
79 * Declarations
80 */
81
82char *		__tnf_probe_alloc(size_t size);
83
84#ifdef __cplusplus
85}
86#endif
87
88#endif /* _PRB_INTERNALS_H */
89