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 https://opensource.org/licenses/CDDL-1.0. 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 #ifndef _LIBUUTIL_IMPL_H 28 #define _LIBUUTIL_IMPL_H 29 30 31 32 #include <libuutil.h> 33 #include <pthread.h> 34 35 #include <sys/avl_impl.h> 36 #include <sys/byteorder.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 void uu_set_error(uint_t); 43 44 45 __attribute__((format(printf, 1, 2), __noreturn__)) 46 void uu_panic(const char *format, ...); 47 48 49 /* 50 * For debugging purposes, libuutil keeps around linked lists of all uu_lists 51 * and uu_avls, along with pointers to their parents. These can cause false 52 * negatives when looking for memory leaks, so we encode the pointers by 53 * storing them with swapped endianness; this is not perfect, but it's about 54 * the best we can do without wasting a lot of space. 55 */ 56 #ifdef _LP64 57 #define UU_PTR_ENCODE(ptr) BSWAP_64((uintptr_t)(void *)(ptr)) 58 #else 59 #define UU_PTR_ENCODE(ptr) BSWAP_32((uintptr_t)(void *)(ptr)) 60 #endif 61 62 #define UU_PTR_DECODE(ptr) ((void *)UU_PTR_ENCODE(ptr)) 63 64 /* 65 * uu_list structures 66 */ 67 typedef struct uu_list_node_impl { 68 struct uu_list_node_impl *uln_next; 69 struct uu_list_node_impl *uln_prev; 70 } uu_list_node_impl_t; 71 72 struct uu_list_walk { 73 uu_list_walk_t *ulw_next; 74 uu_list_walk_t *ulw_prev; 75 76 uu_list_t *ulw_list; 77 int8_t ulw_dir; 78 uint8_t ulw_robust; 79 uu_list_node_impl_t *ulw_next_result; 80 }; 81 82 struct uu_list { 83 uintptr_t ul_next_enc; 84 uintptr_t ul_prev_enc; 85 86 uu_list_pool_t *ul_pool; 87 uintptr_t ul_parent_enc; /* encoded parent pointer */ 88 size_t ul_offset; 89 size_t ul_numnodes; 90 uint8_t ul_debug; 91 uint8_t ul_sorted; 92 uint8_t ul_index; /* mark for uu_list_index_ts */ 93 94 uu_list_node_impl_t ul_null_node; 95 uu_list_walk_t ul_null_walk; /* for robust walkers */ 96 }; 97 98 #define UU_LIST_PTR(ptr) ((uu_list_t *)UU_PTR_DECODE(ptr)) 99 100 #define UU_LIST_POOL_MAXNAME 64 101 102 struct uu_list_pool { 103 uu_list_pool_t *ulp_next; 104 uu_list_pool_t *ulp_prev; 105 106 char ulp_name[UU_LIST_POOL_MAXNAME]; 107 size_t ulp_nodeoffset; 108 size_t ulp_objsize; 109 uu_compare_fn_t *ulp_cmp; 110 uint8_t ulp_debug; 111 uint8_t ulp_last_index; 112 pthread_mutex_t ulp_lock; /* protects null_list */ 113 uu_list_t ulp_null_list; 114 }; 115 116 /* 117 * uu_avl structures 118 */ 119 typedef struct avl_node uu_avl_node_impl_t; 120 121 struct uu_avl_walk { 122 uu_avl_walk_t *uaw_next; 123 uu_avl_walk_t *uaw_prev; 124 125 uu_avl_t *uaw_avl; 126 void *uaw_next_result; 127 int8_t uaw_dir; 128 uint8_t uaw_robust; 129 }; 130 131 struct uu_avl { 132 uintptr_t ua_next_enc; 133 uintptr_t ua_prev_enc; 134 135 uu_avl_pool_t *ua_pool; 136 uintptr_t ua_parent_enc; 137 uint8_t ua_debug; 138 uint8_t ua_index; /* mark for uu_avl_index_ts */ 139 140 struct avl_tree ua_tree; 141 uu_avl_walk_t ua_null_walk; 142 }; 143 144 #define UU_AVL_PTR(x) ((uu_avl_t *)UU_PTR_DECODE(x)) 145 146 #define UU_AVL_POOL_MAXNAME 64 147 148 struct uu_avl_pool { 149 uu_avl_pool_t *uap_next; 150 uu_avl_pool_t *uap_prev; 151 152 char uap_name[UU_AVL_POOL_MAXNAME]; 153 size_t uap_nodeoffset; 154 size_t uap_objsize; 155 uu_compare_fn_t *uap_cmp; 156 uint8_t uap_debug; 157 uint8_t uap_last_index; 158 pthread_mutex_t uap_lock; /* protects null_avl */ 159 uu_avl_t uap_null_avl; 160 }; 161 162 /* 163 * atfork() handlers 164 */ 165 void uu_avl_lockup(void); 166 void uu_avl_release(void); 167 168 void uu_list_lockup(void); 169 void uu_list_release(void); 170 171 #ifdef __cplusplus 172 } 173 #endif 174 175 #endif /* _LIBUUTIL_IMPL_H */ 176