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 38 extern "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 67 typedef 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 82 char * __tnf_probe_alloc(size_t size); 83 84 #ifdef __cplusplus 85 } 86 #endif 87 88 #endif /* _PRB_INTERNALS_H */ 89