Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 1 | /* |
Kiet Lam | aa8e15a | 2014-02-11 23:30:06 -0800 | [diff] [blame^] | 2 | * Copyright (c) 2012-2013 Qualcomm Atheros, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * Qualcomm Atheros Confidential and Proprietary. |
Gopichand Nakkala | 92f07d8 | 2013-01-08 21:16:34 -0800 | [diff] [blame] | 5 | */ |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 6 | /**============================================================================= |
| 7 | |
| 8 | vos_list.c |
| 9 | |
| 10 | \brief |
| 11 | |
| 12 | Description... |
| 13 | |
| 14 | |
| 15 | Copyright 2008 (c) Qualcomm, Incorporated. |
| 16 | All Rights Reserved. |
| 17 | Qualcomm Confidential and Proprietary. |
| 18 | |
| 19 | ==============================================================================**/ |
| 20 | /* $HEADER$ */ |
| 21 | |
| 22 | /**----------------------------------------------------------------------------- |
| 23 | Include files |
| 24 | ----------------------------------------------------------------------------*/ |
| 25 | #include <vos_list.h> |
| 26 | #include <vos_trace.h> |
| 27 | |
| 28 | /**----------------------------------------------------------------------------- |
| 29 | Preprocessor definitions and constants |
| 30 | ----------------------------------------------------------------------------*/ |
| 31 | #define VOS_LIST_COOKIE 0xabadfeed |
| 32 | |
| 33 | |
| 34 | /**----------------------------------------------------------------------------- |
| 35 | Type declarations |
| 36 | ----------------------------------------------------------------------------*/ |
| 37 | |
| 38 | /**----------------------------------------------------------------------------- |
| 39 | Function declarations and documenation |
| 40 | ----------------------------------------------------------------------------*/ |
| 41 | VOS_STATUS vos_list_init( vos_list_t *pList ) |
| 42 | { |
| 43 | if ( pList == NULL) |
| 44 | { |
| 45 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 46 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 47 | return VOS_STATUS_E_FAULT; |
| 48 | } |
| 49 | |
| 50 | if ( pList->cookie == VOS_LIST_COOKIE ) |
| 51 | { |
| 52 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 53 | "%s: already initialized list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 54 | return VOS_STATUS_E_BUSY; |
| 55 | } |
| 56 | |
| 57 | mutex_init(&pList->lock); |
| 58 | |
| 59 | INIT_LIST_HEAD( &pList->anchor ); |
| 60 | |
| 61 | pList->count = 0; |
| 62 | pList->cookie = VOS_LIST_COOKIE; |
| 63 | |
| 64 | return( VOS_STATUS_SUCCESS ); |
| 65 | } |
| 66 | |
| 67 | |
| 68 | VOS_STATUS vos_list_destroy( vos_list_t *pList ) |
| 69 | { |
| 70 | int rc; |
| 71 | if (pList == NULL) |
| 72 | { |
| 73 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 74 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 75 | return VOS_STATUS_E_FAULT; |
| 76 | } |
| 77 | |
| 78 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 79 | { |
| 80 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 81 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 82 | return VOS_STATUS_E_INVAL; |
| 83 | } |
| 84 | |
| 85 | rc = mutex_lock_interruptible(&pList->lock); |
| 86 | if (rc) |
| 87 | { |
| 88 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 89 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 90 | return VOS_STATUS_E_FAULT; |
| 91 | } |
| 92 | |
| 93 | if ( pList->count !=0 ) |
| 94 | { |
| 95 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 96 | "%s: list length not equal to zero", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 97 | mutex_unlock(&pList->lock); |
| 98 | return VOS_STATUS_E_BUSY; |
| 99 | } |
| 100 | |
| 101 | // clear the cookie. This indicates the list is destroyed. |
| 102 | pList->cookie = 0; |
| 103 | mutex_unlock(&pList->lock); |
| 104 | |
| 105 | return VOS_STATUS_SUCCESS; |
| 106 | } |
| 107 | |
| 108 | |
| 109 | VOS_STATUS vos_list_insert_front( vos_list_t *pList, vos_list_node_t *pNode ) |
| 110 | { |
| 111 | int rc; |
| 112 | |
| 113 | if ( ( pList == NULL) || ( pNode == NULL) ) |
| 114 | { |
| 115 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 116 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 117 | return VOS_STATUS_E_FAULT; |
| 118 | } |
| 119 | |
| 120 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 121 | { |
| 122 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 123 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 124 | return VOS_STATUS_E_INVAL; |
| 125 | } |
| 126 | |
| 127 | rc = mutex_lock_interruptible(&pList->lock); |
| 128 | if (rc) |
| 129 | { |
| 130 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 131 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 132 | return VOS_STATUS_E_FAULT; |
| 133 | } |
| 134 | |
| 135 | list_add( pNode, &pList->anchor ); |
| 136 | |
| 137 | pList->count++; |
| 138 | mutex_unlock(&pList->lock); |
| 139 | |
| 140 | return VOS_STATUS_SUCCESS; |
| 141 | } |
| 142 | |
| 143 | VOS_STATUS vos_list_insert_back( vos_list_t *pList, vos_list_node_t *pNode ) |
| 144 | { |
| 145 | int rc; |
| 146 | |
| 147 | if ( ( pList == NULL) || ( pNode == NULL) ) |
| 148 | { |
| 149 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 150 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 151 | return VOS_STATUS_E_FAULT; |
| 152 | } |
| 153 | |
| 154 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 155 | { |
| 156 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 157 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 158 | return VOS_STATUS_E_INVAL; |
| 159 | } |
| 160 | |
| 161 | rc = mutex_lock_interruptible(&pList->lock); |
| 162 | if (rc) |
| 163 | { |
| 164 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 165 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 166 | return VOS_STATUS_E_FAULT; |
| 167 | } |
| 168 | |
| 169 | list_add_tail( pNode, &pList->anchor ); |
| 170 | |
| 171 | pList->count++; |
| 172 | mutex_unlock(&pList->lock); |
| 173 | |
| 174 | return VOS_STATUS_SUCCESS; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | VOS_STATUS vos_list_insert_back_size( vos_list_t *pList, vos_list_node_t *pNode, v_SIZE_t *pSize ) |
| 179 | { |
| 180 | int rc; |
| 181 | if ( ( pList == NULL) || ( pNode == NULL) || (pSize == NULL) ) |
| 182 | { |
| 183 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 184 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 185 | return VOS_STATUS_E_FAULT; |
| 186 | } |
| 187 | |
| 188 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 189 | { |
| 190 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 191 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 192 | return VOS_STATUS_E_INVAL; |
| 193 | } |
| 194 | |
| 195 | rc = mutex_lock_interruptible(&pList->lock); |
| 196 | if (rc) |
| 197 | { |
| 198 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 199 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 200 | return VOS_STATUS_E_FAULT; |
| 201 | } |
| 202 | |
| 203 | list_add_tail( pNode, &pList->anchor ); |
| 204 | |
| 205 | pList->count++; |
| 206 | *pSize = pList->count; |
| 207 | mutex_unlock(&pList->lock); |
| 208 | |
| 209 | return VOS_STATUS_SUCCESS; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | VOS_STATUS vos_list_remove_front( vos_list_t *pList, vos_list_node_t **ppNode ) |
| 214 | { |
| 215 | struct list_head * listptr; |
| 216 | int rc; |
| 217 | |
| 218 | // the assumption here is that pList is the head of the list (dummy |
| 219 | // node) and points to first and last element in circular linked list |
| 220 | if ( ( pList == NULL ) || ( ppNode == NULL) ) |
| 221 | { |
| 222 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 223 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 224 | return VOS_STATUS_E_FAULT; |
| 225 | } |
| 226 | |
| 227 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 228 | { |
| 229 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 230 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 231 | return VOS_STATUS_E_INVAL; |
| 232 | } |
| 233 | |
| 234 | rc = mutex_lock_interruptible(&pList->lock); |
| 235 | if (rc) |
| 236 | { |
| 237 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 238 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 239 | return VOS_STATUS_E_FAULT; |
| 240 | } |
| 241 | |
| 242 | if ( list_empty( &pList->anchor ) ) |
| 243 | { |
Mohit Khanna | 2386376 | 2012-09-11 17:40:09 -0700 | [diff] [blame] | 244 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_INFO_HIGH, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 245 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 246 | mutex_unlock(&pList->lock); |
| 247 | return VOS_STATUS_E_EMPTY; |
| 248 | } |
| 249 | |
| 250 | listptr = pList->anchor.next; |
| 251 | |
| 252 | *ppNode = listptr; |
| 253 | |
| 254 | list_del(pList->anchor.next); |
| 255 | |
| 256 | pList->count--; |
| 257 | mutex_unlock(&pList->lock); |
| 258 | return VOS_STATUS_SUCCESS; |
| 259 | } |
| 260 | |
| 261 | |
| 262 | |
| 263 | VOS_STATUS vos_list_remove_back( vos_list_t *pList, vos_list_node_t **ppNode ) |
| 264 | { |
| 265 | struct list_head * listptr; |
| 266 | int rc; |
| 267 | |
| 268 | // the assumption here is that pList is the head of the list (dummy node) and points to first and |
| 269 | // last element in circular linked list |
| 270 | if ( ( pList == NULL ) || ( ppNode == NULL) ) |
| 271 | { |
| 272 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 273 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 274 | return VOS_STATUS_E_FAULT; |
| 275 | } |
| 276 | |
| 277 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 278 | { |
| 279 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 280 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 281 | return VOS_STATUS_E_INVAL; |
| 282 | } |
| 283 | |
| 284 | rc = mutex_lock_interruptible(&pList->lock); |
| 285 | if (rc) |
| 286 | { |
| 287 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 288 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 289 | return VOS_STATUS_E_FAULT; |
| 290 | } |
| 291 | |
| 292 | if ( list_empty( &pList->anchor ) ) |
| 293 | { |
| 294 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_WARN, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 295 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 296 | mutex_unlock(&pList->lock); |
| 297 | return VOS_STATUS_E_EMPTY; |
| 298 | } |
| 299 | |
| 300 | listptr = pList->anchor.prev; |
| 301 | |
| 302 | *ppNode = listptr; |
| 303 | |
| 304 | list_del(pList->anchor.prev); |
| 305 | |
| 306 | pList->count--; |
| 307 | mutex_unlock(&pList->lock); |
| 308 | |
| 309 | return VOS_STATUS_SUCCESS; |
| 310 | } |
| 311 | |
| 312 | VOS_STATUS vos_list_size( vos_list_t *pList, v_SIZE_t *pSize ) |
| 313 | { |
| 314 | int rc; |
| 315 | if ( ( pList ==NULL) || ( pSize == NULL) ) |
| 316 | { |
| 317 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 318 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 319 | return VOS_STATUS_E_FAULT; |
| 320 | } |
| 321 | |
| 322 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 323 | { |
| 324 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 325 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 326 | return VOS_STATUS_E_INVAL; |
| 327 | } |
| 328 | |
| 329 | rc = mutex_lock_interruptible(&pList->lock); |
| 330 | if (rc) |
| 331 | { |
| 332 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 333 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 334 | return VOS_STATUS_E_FAULT; |
| 335 | } |
| 336 | |
| 337 | *pSize = pList->count; |
| 338 | mutex_unlock(&pList->lock); |
| 339 | |
| 340 | return VOS_STATUS_SUCCESS; |
| 341 | } |
| 342 | |
| 343 | |
| 344 | /*---------------------------------------------------------------------------- |
| 345 | |
| 346 | \brief vos_list_peek_front() - peek at the node at front of a linked list |
| 347 | |
| 348 | The vos_list_peek_front() API will return a pointer to the node at the |
| 349 | front of a properly initialized vOS List object. The node will *not* be |
| 350 | removed from the list. |
| 351 | |
| 352 | \param pList - Pointer to list object of the list to be 'peeked' |
| 353 | |
| 354 | \param ppNode - Pointer to a pointer to the list node that exists at |
| 355 | the front of the list. |
| 356 | |
| 357 | \return VOS_STATUS_SUCCESS - list node at the front of the list was |
| 358 | successfully returned. |
| 359 | |
| 360 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 361 | initialized list object. |
| 362 | |
| 363 | VOS_STATUS_E_EMPTY - The specified is empty so nodes cannot be |
| 364 | removed. |
| 365 | |
| 366 | VOS_STATUS_E_FAULT - pList or or ppNode is an invalid pointer. |
| 367 | |
| 368 | \sa vos_list_remove_back() |
| 369 | |
| 370 | --------------------------------------------------------------------------*/ |
| 371 | |
| 372 | VOS_STATUS vos_list_peek_front( vos_list_t *pList, vos_list_node_t **ppNode ) |
| 373 | { |
| 374 | struct list_head * listptr; |
| 375 | int rc; |
| 376 | |
| 377 | if ( ( pList == NULL) || ( ppNode == NULL) ) |
| 378 | { |
| 379 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 380 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 381 | return VOS_STATUS_E_FAULT; |
| 382 | } |
| 383 | |
| 384 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 385 | { |
| 386 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 387 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 388 | return VOS_STATUS_E_INVAL; |
| 389 | } |
| 390 | |
| 391 | rc = mutex_lock_interruptible(&pList->lock); |
| 392 | if (rc) |
| 393 | { |
| 394 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 395 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 396 | return VOS_STATUS_E_FAULT; |
| 397 | } |
| 398 | |
| 399 | if ( list_empty(&pList->anchor) ) |
| 400 | { |
| 401 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_WARN, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 402 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 403 | mutex_unlock(&pList->lock); |
| 404 | return VOS_STATUS_E_EMPTY; |
| 405 | } |
| 406 | listptr = pList->anchor.next; |
| 407 | *ppNode = listptr; |
| 408 | mutex_unlock(&pList->lock); |
| 409 | |
| 410 | return VOS_STATUS_SUCCESS; |
| 411 | } |
| 412 | |
| 413 | /*---------------------------------------------------------------------------- |
| 414 | |
| 415 | \brief vos_list_peek_back() - peek at the node at back of a linked list |
| 416 | |
| 417 | The vos_list_peek_back() API will return a pointer to the node at the |
| 418 | back of a properly initialized vOS List object. The node will *not* be |
| 419 | removed from the list. |
| 420 | |
| 421 | \param pList - Pointer to list object of the list to be 'peeked' |
| 422 | |
| 423 | \param ppNode - Pointer to a pointer to the list node that exists at |
| 424 | the back of the list. |
| 425 | |
| 426 | \return VOS_STATUS_SUCCESS - list node at the back of the list was |
| 427 | successfully returned. |
| 428 | |
| 429 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 430 | initialized list object. |
| 431 | |
| 432 | VOS_STATUS_E_EMPTY - The specified is empty so nodes cannot be |
| 433 | removed. |
| 434 | |
| 435 | VOS_STATUS_E_FAULT - pList or or ppNode is an invalid pointer. |
| 436 | |
| 437 | \sa vos_list_peek_back(), vos_list_remove_back(), vos_list_peek_front(), |
| 438 | vos_list_remove_front() |
| 439 | |
| 440 | --------------------------------------------------------------------------*/ |
| 441 | |
| 442 | VOS_STATUS vos_list_peek_back( vos_list_t *pList, vos_list_node_t **ppNode ) |
| 443 | { |
| 444 | struct list_head * listptr; |
| 445 | int rc; |
| 446 | |
| 447 | if ( ( pList == NULL) || ( ppNode == NULL) ) |
| 448 | { |
| 449 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 450 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 451 | return VOS_STATUS_E_FAULT; |
| 452 | } |
| 453 | |
| 454 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 455 | { |
| 456 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 457 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 458 | return VOS_STATUS_E_INVAL; |
| 459 | } |
| 460 | |
| 461 | rc = mutex_lock_interruptible(&pList->lock); |
| 462 | if (rc) |
| 463 | { |
| 464 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 465 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 466 | return VOS_STATUS_E_FAULT; |
| 467 | } |
| 468 | |
| 469 | if ( list_empty(&pList->anchor) ) |
| 470 | { |
| 471 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_WARN, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 472 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 473 | mutex_unlock(&pList->lock); |
| 474 | return VOS_STATUS_E_EMPTY; |
| 475 | } |
| 476 | listptr = pList->anchor.prev; |
| 477 | *ppNode = listptr; |
| 478 | mutex_unlock(&pList->lock); |
| 479 | |
| 480 | return VOS_STATUS_SUCCESS; |
| 481 | } |
| 482 | |
| 483 | /*---------------------------------------------------------------------------- |
| 484 | |
| 485 | \brief vos_list_peek_next() - peek at the node after the specified node |
| 486 | |
| 487 | The vos_list_peek_next() API will return a pointer to the node following the |
| 488 | specified node on a properly initialized vOS List object. The node will |
| 489 | *not* be removed from the list. |
| 490 | |
| 491 | \param pList - Pointer to list object of the list to be 'peeked' |
| 492 | |
| 493 | \param pNode - Pointer to the node that is being 'peeked' |
| 494 | |
| 495 | \param ppNode - Pointer to a pointer to the list node that follows the |
| 496 | pNode node on the list. |
| 497 | |
| 498 | \return VOS_STATUS_SUCCESS - list node following pNode on the properly |
| 499 | initialized list is successfully returned. |
| 500 | |
| 501 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 502 | initialized list object. |
| 503 | |
| 504 | VOS_STATUS_E_EMPTY - There is no 'next' node (the input node is |
| 505 | at the back of the list). |
| 506 | |
| 507 | VOS_STATUS_E_FAULT - pList, pNode or ppNode is an invalid pointer. |
| 508 | |
| 509 | \sa vos_list_remove_back() |
| 510 | |
| 511 | --------------------------------------------------------------------------*/ |
| 512 | |
| 513 | VOS_STATUS vos_list_peek_next( vos_list_t *pList, vos_list_node_t *pNode, |
| 514 | vos_list_node_t **ppNode ) |
| 515 | { |
| 516 | struct list_head * listptr; |
| 517 | int rc, found = 0; |
| 518 | vos_list_node_t *tmp; |
| 519 | |
| 520 | if ( ( pList == NULL) || ( pNode == NULL) || (ppNode == NULL)) |
| 521 | { |
| 522 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 523 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 524 | return VOS_STATUS_E_FAULT; |
| 525 | } |
| 526 | |
| 527 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 528 | { |
| 529 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 530 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 531 | return VOS_STATUS_E_INVAL; |
| 532 | } |
| 533 | |
| 534 | rc = mutex_lock_interruptible(&pList->lock); |
| 535 | if (rc) |
| 536 | { |
| 537 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 538 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 539 | return VOS_STATUS_E_FAULT; |
| 540 | } |
| 541 | |
| 542 | if ( list_empty(&pList->anchor) ) |
| 543 | { |
| 544 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_INFO, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 545 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 546 | mutex_unlock(&pList->lock); |
| 547 | return VOS_STATUS_E_EMPTY; |
| 548 | } |
| 549 | |
| 550 | // verify that pNode is indeed part of list pList |
| 551 | list_for_each(tmp, &pList->anchor) |
| 552 | { |
| 553 | if (tmp == pNode) |
| 554 | { |
| 555 | found = 1; |
| 556 | break; |
| 557 | } |
| 558 | } |
| 559 | if (found == 0) |
| 560 | return VOS_STATUS_E_INVAL; |
| 561 | |
| 562 | listptr = pNode->next; |
| 563 | if (listptr == &pList->anchor) |
| 564 | { |
| 565 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_INFO, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 566 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 567 | mutex_unlock(&pList->lock); |
| 568 | return VOS_STATUS_E_EMPTY; |
| 569 | } |
| 570 | |
| 571 | *ppNode = listptr; |
| 572 | mutex_unlock(&pList->lock); |
| 573 | |
| 574 | return VOS_STATUS_SUCCESS; |
| 575 | } |
| 576 | |
| 577 | /*---------------------------------------------------------------------------- |
| 578 | |
| 579 | \brief vos_list_peek_prev() - peek at the node before the specified node |
| 580 | |
| 581 | The vos_list_peek_prev() API will return a pointer to the node before the |
| 582 | specified node on a properly initialized vOS List object. The node will |
| 583 | *not* be removed from the list. |
| 584 | |
| 585 | \param pList - Pointer to list object of the list to be 'peeked' |
| 586 | |
| 587 | \param pNode - Pointer to the node that is being 'peeked' |
| 588 | |
| 589 | \param ppNode - Pointer to a pointer to the list node before the |
| 590 | pNode node on the list. |
| 591 | |
| 592 | \return VOS_STATUS_SUCCESS - list node before pNode on the properly |
| 593 | initialized list is successfully returned. |
| 594 | |
| 595 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 596 | initialized list object. |
| 597 | |
| 598 | VOS_STATUS_E_EMPTY - There is no 'previous' node (the input node is |
| 599 | at the front of the list). |
| 600 | |
| 601 | VOS_STATUS_E_FAULT - pList, pNode or ppNode is an invalid pointer. |
| 602 | |
| 603 | \sa vos_list_remove_back() |
| 604 | |
| 605 | --------------------------------------------------------------------------*/ |
| 606 | |
| 607 | VOS_STATUS vos_list_peek_prev( vos_list_t *pList, vos_list_node_t *pNode, |
| 608 | vos_list_node_t **ppNode ) |
| 609 | { |
| 610 | struct list_head * listptr; |
| 611 | int rc, found = 0; |
| 612 | vos_list_node_t *tmp; |
| 613 | |
| 614 | if ( ( pList == NULL) || ( pNode == NULL) || (ppNode == NULL) ) |
| 615 | { |
| 616 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 617 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 618 | return VOS_STATUS_E_FAULT; |
| 619 | } |
| 620 | |
| 621 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 622 | { |
| 623 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 624 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 625 | return VOS_STATUS_E_INVAL; |
| 626 | } |
| 627 | |
| 628 | rc = mutex_lock_interruptible(&pList->lock); |
| 629 | if (rc) |
| 630 | { |
| 631 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 632 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 633 | return VOS_STATUS_E_FAULT; |
| 634 | } |
| 635 | |
| 636 | if ( list_empty(&pList->anchor) ) |
| 637 | { |
| 638 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_WARN, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 639 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 640 | mutex_unlock(&pList->lock); |
| 641 | return VOS_STATUS_E_EMPTY; |
| 642 | } |
| 643 | |
| 644 | // verify that pNode is indeed part of list pList |
| 645 | list_for_each(tmp, &pList->anchor) |
| 646 | { |
| 647 | if (tmp == pNode) |
| 648 | { |
| 649 | found = 1; |
| 650 | break; |
| 651 | } |
| 652 | } |
| 653 | if (found == 0) |
| 654 | return VOS_STATUS_E_INVAL; |
| 655 | |
| 656 | listptr = pNode->prev; |
| 657 | |
| 658 | if (listptr == &pList->anchor) |
| 659 | { |
| 660 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_WARN, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 661 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 662 | mutex_unlock(&pList->lock); |
| 663 | return VOS_STATUS_E_EMPTY; |
| 664 | } |
| 665 | |
| 666 | *ppNode = listptr; |
| 667 | mutex_unlock(&pList->lock); |
| 668 | |
| 669 | return VOS_STATUS_SUCCESS; |
| 670 | } |
| 671 | |
| 672 | /*---------------------------------------------------------------------------- |
| 673 | |
| 674 | \brief vos_list_insert_before() - insert node at front of a specified |
| 675 | list node |
| 676 | |
| 677 | The vos_list_insert_before() API will insert a node onto a properly |
| 678 | initialized vOS List object in front of the specified list node. |
| 679 | |
| 680 | \param pList - Pointer to list object where the node will be inserted |
| 681 | |
| 682 | \param pNodeToInsert - Pointer to the list node to be inserted into the list. |
| 683 | |
| 684 | \param pNode - Pointer to the list node where pNodeToInsert will be inserted |
| 685 | in front of. |
| 686 | |
| 687 | \return VOS_STATUS_SUCCESS - list node was successfully inserted onto |
| 688 | the front of the list. |
| 689 | |
| 690 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 691 | initialized list object. |
| 692 | |
| 693 | VOS_STATUS_E_FAULT - pList, pNodeToInsert, or pNode are |
| 694 | invalid pointer(s) |
| 695 | |
| 696 | \sa |
| 697 | |
| 698 | --------------------------------------------------------------------------*/ |
| 699 | VOS_STATUS vos_list_insert_before( vos_list_t *pList, vos_list_node_t *pNodeToInsert, |
| 700 | vos_list_node_t *pNode ) |
| 701 | { |
| 702 | int rc, found = 0; |
| 703 | vos_list_node_t *tmp; |
| 704 | |
| 705 | if ( ( pList == NULL) || ( pNode == NULL) || (pNodeToInsert == NULL)) |
| 706 | { |
| 707 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 708 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 709 | return VOS_STATUS_E_FAULT; |
| 710 | } |
| 711 | |
| 712 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 713 | { |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 714 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 715 | return VOS_STATUS_E_INVAL; |
| 716 | } |
| 717 | |
| 718 | rc = mutex_lock_interruptible(&pList->lock); |
| 719 | if (rc) |
| 720 | { |
| 721 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 722 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 723 | return VOS_STATUS_E_FAULT; |
| 724 | } |
| 725 | |
| 726 | if ( list_empty(&pList->anchor) ) |
| 727 | { |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 728 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 729 | mutex_unlock(&pList->lock); |
| 730 | return VOS_STATUS_E_EMPTY; |
| 731 | } |
| 732 | |
| 733 | // verify that pNode is indeed part of list pList |
| 734 | list_for_each(tmp, &pList->anchor) |
| 735 | { |
| 736 | if (tmp == pNode) |
| 737 | { |
| 738 | found = 1; |
| 739 | break; |
| 740 | } |
| 741 | } |
| 742 | if (found == 0) |
| 743 | return VOS_STATUS_E_INVAL; |
| 744 | |
| 745 | list_add(pNodeToInsert, pNode); |
| 746 | pList->count++; |
| 747 | mutex_unlock(&pList->lock); |
| 748 | |
| 749 | return VOS_STATUS_SUCCESS; |
| 750 | } |
| 751 | |
| 752 | |
| 753 | /*---------------------------------------------------------------------------- |
| 754 | |
| 755 | \brief vos_list_insert_after() - insert node behind a specified list node |
| 756 | |
| 757 | The vos_list_insert_after() API will insert a node onto a properly |
| 758 | initialized vOS List object after the specified list node. |
| 759 | |
| 760 | \param pList - Pointer to list object where the node will be inserted |
| 761 | |
| 762 | \param pNodeToInsert - Pointer to the list node to be inserted into the list. |
| 763 | |
| 764 | \param pNode - Pointer to the list node where pNodeToInsert will be inserted |
| 765 | after. |
| 766 | |
| 767 | \return VOS_STATUS_SUCCESS - list node was successfully inserted onto |
| 768 | the front of the list. |
| 769 | |
| 770 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 771 | initialized list object. |
| 772 | |
| 773 | VOS_STATUS_E_FAULT - pList, pNodeToInsert, or pNode are |
| 774 | invalid pointer(s) |
| 775 | |
| 776 | \sa |
| 777 | |
| 778 | --------------------------------------------------------------------------*/ |
| 779 | VOS_STATUS vos_list_insert_after( vos_list_t *pList, vos_list_node_t *pNodeToInsert, |
| 780 | vos_list_node_t *pNode ) |
| 781 | { |
| 782 | int rc, found = 0; |
| 783 | vos_list_node_t *tmp; |
| 784 | |
| 785 | if ( ( pList == NULL) || ( pNode == NULL) || (pNodeToInsert == NULL)) |
| 786 | { |
| 787 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 788 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 789 | return VOS_STATUS_E_FAULT; |
| 790 | } |
| 791 | |
| 792 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 793 | { |
| 794 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 795 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 796 | return VOS_STATUS_E_INVAL; |
| 797 | } |
| 798 | |
| 799 | rc = mutex_lock_interruptible(&pList->lock); |
| 800 | if (rc) |
| 801 | { |
| 802 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 803 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 804 | return VOS_STATUS_E_FAULT; |
| 805 | } |
| 806 | |
| 807 | |
| 808 | if ( list_empty(&pList->anchor) ) |
| 809 | { |
| 810 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 811 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 812 | mutex_unlock(&pList->lock); |
| 813 | return VOS_STATUS_E_EMPTY; |
| 814 | } |
| 815 | |
| 816 | // verify that pNode is indeed part of list pList |
| 817 | list_for_each(tmp, &pList->anchor) |
| 818 | { |
| 819 | if (tmp == pNode) |
| 820 | { |
| 821 | found = 1; |
| 822 | break; |
| 823 | } |
| 824 | } |
| 825 | if (found == 0) |
| 826 | return VOS_STATUS_E_INVAL; |
| 827 | |
| 828 | list_add_tail(pNodeToInsert, pNode); |
| 829 | pList->count++; |
| 830 | mutex_unlock(&pList->lock); |
| 831 | |
| 832 | return VOS_STATUS_SUCCESS; |
| 833 | } |
| 834 | |
| 835 | /*---------------------------------------------------------------------------- |
| 836 | |
| 837 | \brief vos_list_remove_node() - remove specified node from vOS list list |
| 838 | |
| 839 | The vos_list_remove_node() API will remove a specified node from the |
| 840 | properly initialized vOS List object. |
| 841 | |
| 842 | \param pList - Pointer to list object where the node will be removed |
| 843 | |
| 844 | \param ppNode - Pointer to the node to be removed from the list. |
| 845 | |
| 846 | \return VOS_STATUS_SUCCESS - list node was successfully removed from |
| 847 | the list. |
| 848 | |
| 849 | VOS_STATUS_E_INVAL - The value specified by pList is not a valid, |
| 850 | initialized list object. |
| 851 | |
| 852 | VOS_STATUS_E_EMPTY - The specified is empty so nodes cannot be |
| 853 | removed. |
| 854 | |
| 855 | |
| 856 | VOS_STATUS_E_FAULT - pList or pNodeToRemove is not a valid pointer |
| 857 | |
| 858 | \sa |
| 859 | |
| 860 | --------------------------------------------------------------------------*/ |
| 861 | VOS_STATUS vos_list_remove_node( vos_list_t *pList, vos_list_node_t *pNodeToRemove ) |
| 862 | { |
| 863 | int rc, found = 0; |
| 864 | vos_list_node_t *tmp; |
| 865 | |
| 866 | if ( ( pList == NULL ) || ( pNodeToRemove == NULL) ) |
| 867 | { |
| 868 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 869 | "%s: NULL pointer passed in", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 870 | return VOS_STATUS_E_FAULT; |
| 871 | } |
| 872 | |
| 873 | if ( pList->cookie != VOS_LIST_COOKIE ) |
| 874 | { |
| 875 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 876 | "%s: list not initialized", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 877 | return VOS_STATUS_E_INVAL; |
| 878 | } |
| 879 | |
| 880 | rc = mutex_lock_interruptible(&pList->lock); |
| 881 | if (rc) |
| 882 | { |
| 883 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 884 | "%s: unable to lock list", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 885 | return VOS_STATUS_E_FAULT; |
| 886 | } |
| 887 | |
| 888 | if ( list_empty(&pList->anchor) ) |
| 889 | { |
| 890 | VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, |
Madan Mohan Koyyalamudi | 87054ba | 2012-11-02 13:24:12 -0700 | [diff] [blame] | 891 | "%s: list empty", __func__); |
Jeff Johnson | 295189b | 2012-06-20 16:38:30 -0700 | [diff] [blame] | 892 | mutex_unlock(&pList->lock); |
| 893 | return VOS_STATUS_E_EMPTY; |
| 894 | } |
| 895 | |
| 896 | // verify that pNodeToRemove is indeed part of list pList |
| 897 | list_for_each(tmp, &pList->anchor) |
| 898 | { |
| 899 | if (tmp == pNodeToRemove) |
| 900 | { |
| 901 | found = 1; |
| 902 | break; |
| 903 | } |
| 904 | } |
| 905 | if (found == 0) |
| 906 | return VOS_STATUS_E_INVAL; |
| 907 | |
| 908 | list_del(pNodeToRemove); |
| 909 | pList->count--; |
| 910 | mutex_unlock(&pList->lock); |
| 911 | |
| 912 | return VOS_STATUS_SUCCESS; |
| 913 | } |