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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1994, by Sun Microsytems, Inc.
*/
#ifndef _PRB_INTERNALS_H
#define _PRB_INTERNALS_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Includes
*/
#include <synch.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Notes:
*
* There is a memseg statically allocated in libtnfprobe. This memory is
* consumed by the internal and external probe control fucntions for
* initial_final blocks, and compositions.
*
* There is no mechanism for freeing this memory; it is leaked. This is
* because the overhead involved to protect uses of old memory is too
* high for probes.
*
* The target program internally allocates memory from the bottom edge of
* the segment, and the external program allocates from the high edge of
* the segment.
*
* The i_reqsz field is set by the internal memory allocation routine
* while it is allocating. If the external process happens to freeze the
* target process while it is in the middle of an internal allocation the
* i_reqsz field allows the external process to be extra conservative in
* avoiding a memory collision.
*/
/*
* Typedefs
*/
typedef struct tnf_memseg
{
char * min_p; /* points to min free byte */
char * max_p; /* points past max free byte */
mutex_t i_lock; /* internal sync lock */
size_t i_reqsz; /* internal request size */
} tnf_memseg_t;
/*
* Declarations
*/
char * __tnf_probe_alloc(size_t size);
#ifdef __cplusplus
}
#endif
#endif /* _PRB_INTERNALS_H */
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