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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 2015, Joyent, Inc. All rights reserved. 29 */ 30 31 #ifndef _LIBUUTIL_IMPL_H 32 #define _LIBUUTIL_IMPL_H 33 34 #include <libuutil.h> 35 #include <pthread.h> 36 37 #include <sys/avl_impl.h> 38 #include <sys/byteorder.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 void uu_set_error(uint_t); 45 #pragma rarely_called(uu_set_error) 46 47 struct uu_dprintf { 48 char *uud_name; 49 uu_dprintf_severity_t uud_severity; 50 uint_t uud_flags; 51 }; 52 53 /* 54 * For debugging purposes, libuutil keeps around linked lists of all uu_lists 55 * and uu_avls, along with pointers to their parents. These can cause false 56 * negatives when looking for memory leaks, so we encode the pointers by 57 * storing them with swapped endianness; this is not perfect, but it's about 58 * the best we can do without wasting a lot of space. 59 */ 60 #ifdef _LP64 61 #define UU_PTR_ENCODE(ptr) BSWAP_64((uintptr_t)(void *)(ptr)) 62 #else 63 #define UU_PTR_ENCODE(ptr) BSWAP_32((uintptr_t)(void *)(ptr)) 64 #endif 65 66 #define UU_PTR_DECODE(ptr) ((void *)UU_PTR_ENCODE(ptr)) 67 68 /* 69 * uu_list structures 70 */ 71 typedef struct uu_list_node_impl { 72 struct uu_list_node_impl *uln_next; 73 struct uu_list_node_impl *uln_prev; 74 } uu_list_node_impl_t; 75 76 struct uu_list_walk { 77 uu_list_walk_t *ulw_next; 78 uu_list_walk_t *ulw_prev; 79 80 uu_list_t *ulw_list; 81 int8_t ulw_dir; 82 uint8_t ulw_robust; 83 uu_list_node_impl_t *ulw_next_result; 84 }; 85 86 struct uu_list { 87 uintptr_t ul_next_enc; 88 uintptr_t ul_prev_enc; 89 90 uu_list_pool_t *ul_pool; 91 uintptr_t ul_parent_enc; /* encoded parent pointer */ 92 size_t ul_offset; 93 size_t ul_numnodes; 94 uint8_t ul_debug; 95 uint8_t ul_sorted; 96 uint8_t ul_index; /* mark for uu_list_index_ts */ 97 98 uu_list_node_impl_t ul_null_node; 99 uu_list_walk_t ul_null_walk; /* for robust walkers */ 100 }; 101 102 #define UU_LIST_PTR(ptr) ((uu_list_t *)UU_PTR_DECODE(ptr)) 103 104 #define UU_LIST_POOL_MAXNAME 64 105 106 struct uu_list_pool { 107 uu_list_pool_t *ulp_next; 108 uu_list_pool_t *ulp_prev; 109 110 char ulp_name[UU_LIST_POOL_MAXNAME]; 111 size_t ulp_nodeoffset; 112 size_t ulp_objsize; 113 uu_compare_fn_t *ulp_cmp; 114 uint8_t ulp_debug; 115 uint8_t ulp_last_index; 116 pthread_mutex_t ulp_lock; /* protects null_list */ 117 uu_list_t ulp_null_list; 118 }; 119 120 /* 121 * uu_avl structures 122 */ 123 typedef struct avl_node uu_avl_node_impl_t; 124 125 struct uu_avl_walk { 126 uu_avl_walk_t *uaw_next; 127 uu_avl_walk_t *uaw_prev; 128 129 uu_avl_t *uaw_avl; 130 void *uaw_next_result; 131 int8_t uaw_dir; 132 uint8_t uaw_robust; 133 }; 134 135 struct uu_avl { 136 uintptr_t ua_next_enc; 137 uintptr_t ua_prev_enc; 138 139 uu_avl_pool_t *ua_pool; 140 uintptr_t ua_parent_enc; 141 uint8_t ua_debug; 142 uint8_t ua_index; /* mark for uu_avl_index_ts */ 143 144 struct avl_tree ua_tree; 145 uu_avl_walk_t ua_null_walk; 146 }; 147 148 #define UU_AVL_PTR(x) ((uu_avl_t *)UU_PTR_DECODE(x)) 149 150 #define UU_AVL_POOL_MAXNAME 64 151 152 struct uu_avl_pool { 153 uu_avl_pool_t *uap_next; 154 uu_avl_pool_t *uap_prev; 155 156 char uap_name[UU_AVL_POOL_MAXNAME]; 157 size_t uap_nodeoffset; 158 size_t uap_objsize; 159 uu_compare_fn_t *uap_cmp; 160 uint8_t uap_debug; 161 uint8_t uap_last_index; 162 pthread_mutex_t uap_lock; /* protects null_avl */ 163 uu_avl_t uap_null_avl; 164 }; 165 166 /* 167 * atfork() handlers 168 */ 169 void uu_avl_lockup(void); 170 void uu_avl_release(void); 171 172 void uu_list_lockup(void); 173 void uu_list_release(void); 174 175 #ifdef __cplusplus 176 } 177 #endif 178 179 #endif /* _LIBUUTIL_IMPL_H */ 180