1 /* Copyright (c) 2011, The Linux Foundation. All rights reserved. 2 * 3 * Redistribution and use in source and binary forms, with or without 4 * modification, are permitted provided that the following conditions are 5 * met: 6 * * Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * * Redistributions in binary form must reproduce the above 9 * copyright notice, this list of conditions and the following 10 * disclaimer in the documentation and/or other materials provided 11 * with the distribution. 12 * * Neither the name of The Linux Foundation nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef __LINKED_LIST_H__ 29 #define __LINKED_LIST_H__ 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif /* __cplusplus */ 34 35 #include <stdbool.h> 36 #include <stdlib.h> 37 38 /** Linked List Return Codes */ 39 typedef enum 40 { 41 eLINKED_LIST_SUCCESS = 0, 42 /**< Request was successful. */ 43 eLINKED_LIST_FAILURE_GENERAL = -1, 44 /**< Failed because of a general failure. */ 45 eLINKED_LIST_INVALID_PARAMETER = -2, 46 /**< Failed because the request contained invalid parameters. */ 47 eLINKED_LIST_INVALID_HANDLE = -3, 48 /**< Failed because an invalid handle was specified. */ 49 eLINKED_LIST_UNAVAILABLE_RESOURCE = -4, 50 /**< Failed because an there were not enough resources. */ 51 eLINKED_LIST_INSUFFICIENT_BUFFER = -5, 52 /**< Failed because an the supplied buffer was too small. */ 53 }linked_list_err_type; 54 55 /*=========================================================================== 56 FUNCTION linked_list_init 57 58 DESCRIPTION 59 Initializes internal structures for linked list. 60 61 list_data: State of list to be initialized. 62 63 DEPENDENCIES 64 N/A 65 66 RETURN VALUE 67 Look at error codes above. 68 69 SIDE EFFECTS 70 N/A 71 72 ===========================================================================*/ 73 linked_list_err_type linked_list_init(void** list_data); 74 75 /*=========================================================================== 76 FUNCTION linked_list_destroy 77 78 DESCRIPTION 79 Destroys internal structures for linked list. 80 81 p_list_data: State of list to be destroyed. 82 83 DEPENDENCIES 84 N/A 85 86 RETURN VALUE 87 Look at error codes above. 88 89 SIDE EFFECTS 90 N/A 91 92 ===========================================================================*/ 93 linked_list_err_type linked_list_destroy(void** list_data); 94 95 /*=========================================================================== 96 FUNCTION linked_list_add 97 98 DESCRIPTION 99 Adds an element to the head of the linked list. The passed in data pointer 100 is not modified or freed. Passed in data_obj is expected to live throughout 101 the use of the linked_list (i.e. data is not allocated internally) 102 103 p_list_data: List to add data to the head of. 104 data_obj: Pointer to data to add into list 105 dealloc: Function used to deallocate memory for this element. Pass NULL 106 if you do not want data deallocated during a flush operation 107 108 DEPENDENCIES 109 N/A 110 111 RETURN VALUE 112 Look at error codes above. 113 114 SIDE EFFECTS 115 N/A 116 117 ===========================================================================*/ 118 linked_list_err_type linked_list_add(void* list_data, void *data_obj, void (*dealloc)(void*)); 119 120 /*=========================================================================== 121 FUNCTION linked_list_remove 122 123 DESCRIPTION 124 Retrieves data from the list tail. data_obj is the tail element from the list 125 passed in by linked_list_add. 126 127 p_list_data: List to remove the tail from. 128 data_obj: Pointer to data removed from list 129 130 DEPENDENCIES 131 N/A 132 133 RETURN VALUE 134 Look at error codes above. 135 136 SIDE EFFECTS 137 N/A 138 139 ===========================================================================*/ 140 linked_list_err_type linked_list_remove(void* list_data, void **data_obj); 141 142 /*=========================================================================== 143 FUNCTION linked_list_empty 144 145 DESCRIPTION 146 Tells whether the list currently contains any elements 147 148 p_list_data: List to check if empty. 149 150 DEPENDENCIES 151 N/A 152 153 RETURN VALUE 154 0/FALSE : List contains elements 155 1/TRUE : List is Empty 156 Otherwise look at error codes above. 157 158 SIDE EFFECTS 159 N/A 160 161 ===========================================================================*/ 162 int linked_list_empty(void* list_data); 163 164 /*=========================================================================== 165 FUNCTION linked_list_flush 166 167 DESCRIPTION 168 Removes all elements from the list and deallocates them using the provided 169 dealloc function while adding elements. 170 171 p_list_data: List to remove all elements from. 172 173 DEPENDENCIES 174 N/A 175 176 RETURN VALUE 177 Look at error codes above. 178 179 SIDE EFFECTS 180 N/A 181 182 ===========================================================================*/ 183 linked_list_err_type linked_list_flush(void* list_data); 184 185 /*=========================================================================== 186 FUNCTION linked_list_search 187 188 DESCRIPTION 189 Searches for an element in the linked list. 190 191 p_list_data: List handle. 192 data_p: to be stored with the data found; NUll if no match. 193 if data_p passed in as NULL, then no write to it. 194 equal: Function ptr takes in a list element, and returns 195 indication if this the one looking for. 196 data_0: The data being compared against. 197 rm_if_found: Should data be removed if found? 198 199 DEPENDENCIES 200 N/A 201 202 RETURN VALUE 203 Look at error codes above. 204 205 SIDE EFFECTS 206 N/A 207 208 ===========================================================================*/ 209 linked_list_err_type linked_list_search(void* list_data, void **data_p, 210 bool (*equal)(void* data_0, void* data), 211 void* data_0, bool rm_if_found); 212 213 #ifdef __cplusplus 214 } 215 #endif /* __cplusplus */ 216 217 #endif /* __LINKED_LIST_H__ */ 218
