le_doublyLinkedList.h

    1 /**
    2  * @page c_doublyLinkedList Doubly Linked List API
    3  *
    4  * @subpage le_doublyLinkedList.h "API Reference"
    5  *
    6  * <HR>
    7  *
    8  * A doubly linked list is a data structure consisting of a group of nodes linked together linearly.
    9  * Each node consists of data elements with links to the next node and previous nodes.  The main
   10  * advantage of linked lists (over simple arrays) is the nodes can be inserted and removed
   11  * anywhere in the list without reallocating the entire array. Linked list nodes don't
   12  * need to be stored contiguously in memory, but nodes then you can't access by
   13  * index, you have to be access by traversing the list.
   14  *
   15  * @section dls_createList Creating and Initializing Lists
   16  *
   17  * To create and initialize a linked list the user must create a le_dls_List_t typed list and assign
   18  * LE_DLS_LIST_INIT to it.  The assignment of LE_DLS_LIST_INIT can be done either when the list is
   19  * declared or after its declared.  The list <b>must</b> be initialized before it can be
   20  * used.
   21  *
   22  * @code
   23  * // Create and initialized the list in the declaration.
   24  * le_dls_List_t MyList = LE_DLS_LIST_INIT;
   25  * @endcode
   26  *
   27  * Or
   28  *
   29  * @code
   30  * // Create list.
   31  * le_dls_List_t MyList;
   32  *
   33  * // Initialize the list.
   34  * MyList = LE_DLS_LIST_INIT;
   35  * @endcode
   36  *
   37  * <b> Elements of le_dls_List_t MUST NOT be accessed directly by the user. </b>
   38  *
   39  *
   40  * @section dls_createNode Creating and Accessing Nodes
   41  *
   42  * Nodes can contain any data in any format and is defined and created by the user.  The only
   43  * requirement for nodes is that it must contain a @c le_dls_Link_t link member. The link member must
   44  * be initialized by assigning LE_DLS_LINK_INIT to it before it can be used.  Nodes can then be
   45  * added to the list by passing their links to the add functions (le_dls_Stack(), le_dls_Queue(),
   46  * etc.).  For example:
   47  *
   48  * @code
   49  * // The node may be defined like this.
   50  * typedef struct
   51  * {
   52  *      dataType someUserData;
   53  *      ...
   54  *      le_dls_Link_t myLink;
   55  *
   56  * }
   57  * MyNodeClass_t;
   58  *
   59  * // Create and initialize the list.
   60  * le_dls_List_t MyList = LE_DLS_LIST_INIT;
   61  *
   62  * void foo (void)
   63  * {
   64  *     // Create the node.  Get the memory from a memory pool previously created.
   65  *     MyNodeClass_t* myNodePtr = le_mem_ForceAlloc(MyNodePool);
   66  *
   67  *     // Initialize the node's link.
   68  *     myNodePtr->myLink = LE_DLS_LINK_INIT;
   69  *
   70  *     // Add the node to the head of the list by passing in the node's link.
   71  *     le_dls_Stack(&MyList, &(myNodePtr->myLink));
   72  * }
   73  * @endcode
   74  *
   75  * The links in the nodes are actually added to the list and not the nodes themselves. This
   76  * allows a node to be included on multiple lists through links
   77  * added to different lists. It also allows linking different type nodes in a list.
   78  *
   79  * To obtain the node itself, use the @c CONTAINER_OF macro defined in
   80  * le_basics.h.  Here's a code sample using CONTAINER_OF to obtain the node:
   81  *
   82  * @code
   83  * // Assuming mylist has been created and initialized and is not empty.
   84  * le_dls_Link_t* linkPtr = le_dls_Peek(&MyList);
   85  *
   86  * // Now we have the link but still need the node to access user data.
   87  * // We use CONTAINER_OF to get a pointer to the node given the node's link.
   88  * if (linkPtr != NULL)
   89  * {
   90  *     MyNodeClass_t* myNodePtr = CONTAINER_OF(linkPtr, MyNodeClass_t, myLink);
   91  * }
   92  * @endcode
   93  *
   94  * The user is responsible for creating and freeing memory for all nodes; the linked list module
   95  * only manages the links in the nodes.  The node must be removed from all lists before its
   96  * memory can be freed.
   97  *
   98  * <b>The elements of @c le_dls_Link_t MUST NOT be accessed directly by the user.</b>
   99  *
  100  *
  101  * @section dls_add Adding Links to a List
  102  *
  103  * To add nodes to a list, pass the node's link to one of these functions:
  104  *
  105  * - @c le_dls_Stack() - Adds the link to the head of the list.
  106  * - @c le_dls_Queue() - Adds the link to the tail of the list.
  107  * - @c le_dls_AddAfter() - Adds the link to a list after another specified link.
  108  * - @c le_dls_AddBefore() - Adds the link to a list before another specified link.
  109  *
  110  *
  111  * @section dls_remove Removing Links from a List
  112  *
  113  * To remove nodes from a list, use one of these functions:
  114  *
  115  * - @c le_dls_Pop() - Removes and returns the link at the head of the list.
  116  * - @c le_dls_PopTail() - Removes and returns the link at the tail of the list.
  117  * - @c le_dls_Remove() - Remove a specified link from the list.
  118  *
  119  *
  120  * @section dls_peek Accessing Links in a List
  121  *
  122  * To access a link in a list without removing the link, use one of these functions:
  123  *
  124  * - @c le_dls_Peek() - Returns the link at the head of the list without removing it.
  125  * - @c le_dls_PeekTail() - Returns the link at the tail of the list without removing it.
  126  * - @c le_dls_PeekNext() - Returns the link next to a specified link without removing it.
  127  * - @c le_dls_PeekPrev() - Returns the link previous to a specified link without removing it.
  128  *
  129  *
  130  * @section dls_swap Swapping Links
  131  *
  132  * To swap two links, use:
  133  *
  134  * - @c le_dls_Swap() - Swaps the position of two links in a list.
  135  *
  136  * @section dls_sort Sorting Lists
  137  *
  138  * To sort a list use:
  139  *
  140  * @c le_dls_Sort() - Sorts a list
  141  *
  142  * @section dls_query Querying List Status
  143  *
  144  * These functions can be used to query a list's current status:
  145  *
  146  * - @c le_dls_IsEmpty() - Checks if a given list is empty.
  147  * - @c le_dls_IsInList() - Checks if a specified link is in the list.
  148  * - @c le_dls_IsHead() - Checks if a specified link is at the head of the list.
  149  * - @c le_dls_IsTail() - Checks if a specified link is at the tail of the list.
  150  * - @c le_dls_NumLinks() - Checks the number of links currently in the list.
  151  * - @c le_dls_IsListCorrupted() - Checks if the list is corrupted.
  152  *
  153  *
  154  * @section dls_fifo Queues and Stacks
  155  *
  156  * This implementation of linked lists can be used for either queues or stacks.
  157  *
  158  * To use the list as a queue, restrict additions to the list to @c le_dls_Queue() and removals
  159  * from the list to @c le_dls_Pop().
  160  *
  161  * To use the list as a stack,  restrict additions to the list to @c le_dls_Stack() and removals
  162  * from the list to @c le_dls_Pop().
  163  *
  164  *
  165  * @section dls_synch Thread Safety and Re-Entrancy
  166  *
  167  * All linked list function calls are re-entrant and thread safe themselves, but if the nodes and/or
  168  * list object are shared by multiple threads, explicit steps must be taken to maintain mutual
  169  * exclusion of access. If you're accessing the same list from multiple threads, you @e must use a
  170  * @ref c_mutex "mutex" or some other form of thread synchronization to ensure only one thread
  171  * accesses the list at a time.
  172  *
  173  * <HR>
  174  *
  175  * Copyright (C) Sierra Wireless Inc.
  176  */
  177 
  178 
  179 /** @file le_doublyLinkedList.h
  180  *
  181  * Legato @ref c_doublyLinkedList include file.
  182  *
  183  * Copyright (C) Sierra Wireless Inc.
  184  */
  185 
  186 #ifndef LEGATO_DOUBLY_LINKED_LIST_INCLUDE_GUARD
  187 #define LEGATO_DOUBLY_LINKED_LIST_INCLUDE_GUARD
  188 
  189 
  190 //--------------------------------------------------------------------------------------------------
  191 /**
  192  * This link object must be included in each user node.  The node's link object is used to add the
  193  * node to a list.  A node may have multiple link objects which would allow the node to be part of
  194  * multiple lists simultaneously.  This link object must be initialized by assigning
  195  * LE_DLS_LINK_INIT to it.
  196  *
  197  * @warning The structure's content MUST NOT be accessed directly.
  198  */
  199 //--------------------------------------------------------------------------------------------------
  200 typedef struct le_dls_Link
  201 {
  202     struct le_dls_Link* nextPtr;       ///< Next link pointer.
  203     struct le_dls_Link* prevPtr;       ///< Previous link pointer.
  204 }
  205 le_dls_Link_t;
  206 
  207 
  208 //--------------------------------------------------------------------------------------------------
  209 /**
  210  * This is the list object.  User must create this list object and initialize it by assigning
  211  * LE_DLS_LIST_INIT to it.
  212  *
  213  * @warning User MUST NOT access the contents of this structure directly.
  214  */
  215 //--------------------------------------------------------------------------------------------------
  216 typedef struct
  217 {
  218     le_dls_Link_t* headLinkPtr;        ///< Link to list head.
  219 }
  220 le_dls_List_t;
  221 
  222 
  223 //--------------------------------------------------------------------------------------------------
  224 /**
  225  * This is a comparator function for sorting a list.
  226  *
  227  * This must return true if @c a goes before @c b in the list.
  228  */
  229 //--------------------------------------------------------------------------------------------------
  230 typedef bool (*le_dls_LessThanFunc_t)(le_dls_Link_t* a, le_dls_Link_t* b);
  231 
  232 
  233 //--------------------------------------------------------------------------------------------------
  234 /**
  235  * When a list is created it must be initialized to this macro in the declaration,
  236  * or have @c LE_DLS_LIST_INIT assigned to it, before being used
  237  */
  238 //--------------------------------------------------------------------------------------------------
  239 #define LE_DLS_LIST_DECL_INIT {NULL}
  240 
  241 //--------------------------------------------------------------------------------------------------
  242 /**
  243  * When a list is created it must be initialized by assigning this macro to the list, or
  244  * initializing to @c LE_DLS_LIST_DECL_INIT in the declaration, before the list can be used.
  245  */
  246 //--------------------------------------------------------------------------------------------------
  247 #define LE_DLS_LIST_INIT (le_dls_List_t)LE_DLS_LIST_DECL_INIT
  248 
  249 
  250 //--------------------------------------------------------------------------------------------------
  251 /**
  252  * When a link is created it must be initialized by assigning this macro to the link before it can
  253  * be used.
  254  */
  255 //--------------------------------------------------------------------------------------------------
  256 #define LE_DLS_LINK_INIT (le_dls_Link_t){NULL, NULL}
  257 
  258 
  259 //--------------------------------------------------------------------------------------------------
  260 /**
  261  * Adds a link at the head of the list.
  262  */
  263 //--------------------------------------------------------------------------------------------------
  264 void le_dls_Stack
  265 (
  266     le_dls_List_t* listPtr,            ///< [IN] List to add to.
  267     le_dls_Link_t* newLinkPtr          ///< [IN] New link to add.
  268 );
  269 
  270 
  271 //--------------------------------------------------------------------------------------------------
  272 /**
  273  * Adds a link to the tail of the list.
  274  */
  275 //--------------------------------------------------------------------------------------------------
  276 void le_dls_Queue
  277 (
  278     le_dls_List_t* listPtr,            ///< [IN] List to add to.
  279     le_dls_Link_t* newLinkPtr          ///< [IN] New link to add.
  280 );
  281 
  282 
  283 //--------------------------------------------------------------------------------------------------
  284 /**
  285  * Adds a link after currentLinkPtr.  User must ensure that currentLinkPtr is in the list
  286  * otherwise the behaviour of this function is undefined.
  287  */
  288 //--------------------------------------------------------------------------------------------------
  289 void le_dls_AddAfter
  290 (
  291     le_dls_List_t* listPtr,            ///< [IN] List to add to.
  292     le_dls_Link_t* currentLinkPtr,     ///< [IN] New link will be inserted after this link.
  293     le_dls_Link_t* newLinkPtr          ///< [IN] New link to add.
  294 );
  295 
  296 
  297 //--------------------------------------------------------------------------------------------------
  298 /**
  299  * Adds a link after currentLinkPtr.  User must ensure that currentLinkPtr is in the list
  300  * otherwise the behaviour of this function is undefined.
  301  */
  302 //--------------------------------------------------------------------------------------------------
  303 void le_dls_AddBefore
  304 (
  305     le_dls_List_t* listPtr,            ///< [IN] List to add to.
  306     le_dls_Link_t* currentLinkPtr,     ///< [IN] New link will be inserted before this link.
  307     le_dls_Link_t* newLinkPtr          ///< [IN] New link to add.
  308 );
  309 
  310 
  311 //--------------------------------------------------------------------------------------------------
  312 /**
  313  * Removes and returns the link at the head of the list.
  314  *
  315  * @return
  316  *      Removed link.
  317  *      NULL if the link is not available because the list is empty.
  318  */
  319 //--------------------------------------------------------------------------------------------------
  320 le_dls_Link_t* le_dls_Pop
  321 (
  322     le_dls_List_t* listPtr             ///< [IN] List to remove from.
  323 );
  324 
  325 
  326 //--------------------------------------------------------------------------------------------------
  327 /**
  328  * Removes and returns the link at the tail of the list.
  329  *
  330  * @return
  331  *      The removed link.
  332  *      NULL if the link is not available because the list is empty.
  333  */
  334 //--------------------------------------------------------------------------------------------------
  335 le_dls_Link_t* le_dls_PopTail
  336 (
  337     le_dls_List_t* listPtr             ///< [IN] List to remove from.
  338 );
  339 
  340 
  341 //--------------------------------------------------------------------------------------------------
  342 /**
  343  * Removes the specified link from the list.  Ensure the link is in the list
  344  * otherwise the behaviour of this function is undefined.
  345  */
  346 //--------------------------------------------------------------------------------------------------
  347 void le_dls_Remove
  348 (
  349     le_dls_List_t* listPtr,             ///< [IN] List to remove from.
  350     le_dls_Link_t* linkToRemovePtr      ///< [IN] Link to remove.
  351 );
  352 
  353 
  354 //--------------------------------------------------------------------------------------------------
  355 /**
  356  * Returns the link at the head of the list without removing it from the list.
  357  *
  358  * @return
  359  *      Pointer to the head link if successful.
  360  *      NULL if the list is empty.
  361  */
  362 //--------------------------------------------------------------------------------------------------
  363 le_dls_Link_t* le_dls_Peek
  364 (
  365     const le_dls_List_t* listPtr            ///< [IN] The list.
  366 );
  367 
  368 
  369 //--------------------------------------------------------------------------------------------------
  370 /**
  371  * Returns the link at the tail of the list without removing it from the list.
  372  *
  373  * @return
  374  *      A pointer to the tail link if successful.
  375  *      NULL if the list is empty.
  376  */
  377 //--------------------------------------------------------------------------------------------------
  378 le_dls_Link_t* le_dls_PeekTail
  379 (
  380     const le_dls_List_t* listPtr            ///< [IN] The list.
  381 );
  382 
  383 
  384 //--------------------------------------------------------------------------------------------------
  385 /**
  386  * Checks if a list is empty.
  387  *
  388  * @return
  389  *      true if empty, false if not empty.
  390  */
  391 //--------------------------------------------------------------------------------------------------
  392 LE_DECLARE_INLINE bool le_dls_IsEmpty
  393 (
  394     const le_dls_List_t* listPtr            ///< [IN] The list.
  395 )
  396 //--------------------------------------------------------------------------------------------------
  397 {
  398     return (le_dls_Peek(listPtr) == NULL);
  399 }
  400 
  401 
  402 //--------------------------------------------------------------------------------------------------
  403 /**
  404  * Returns the link next to currentLinkPtr (i.e., the link beside currentLinkPtr that is closer to the
  405  * tail) without removing it from the list.  User must ensure that currentLinkPtr is in the list
  406  * otherwise the behaviour of this function is undefined.
  407  *
  408  * @return
  409  *      Pointer to the next link if successful.
  410  *      NULL if there is no link next to the currentLinkPtr (currentLinkPtr is at the tail of the
  411  *      list).
  412  */
  413 //--------------------------------------------------------------------------------------------------
  414 le_dls_Link_t* le_dls_PeekNext
  415 (
  416     const le_dls_List_t* listPtr,           ///< [IN] List containing currentLinkPtr.
  417     const le_dls_Link_t* currentLinkPtr     ///< [IN] Get the link that is relative to this link.
  418 );
  419 
  420 
  421 //--------------------------------------------------------------------------------------------------
  422 /**
  423  * Returns the link previous to currentLinkPtr without removing it from the list.  User must
  424  * ensure that currentLinkPtr is in the list otherwise the behaviour of this function is undefined.
  425  *
  426  * @return
  427  *      Pointer to the previous link if successful.
  428  *      NULL if there is no link previous to the currentLinkPtr (currentLinkPtr is at the head of
  429  *      the list).
  430  */
  431 //--------------------------------------------------------------------------------------------------
  432 le_dls_Link_t* le_dls_PeekPrev
  433 (
  434     const le_dls_List_t* listPtr,          ///< [IN] List containing currentLinkPtr.
  435     const le_dls_Link_t* currentLinkPtr    ///< [IN] Get the link that is relative to this link.
  436 );
  437 
  438 
  439 //--------------------------------------------------------------------------------------------------
  440 /**
  441  * Swaps the position of two links in the list. User must ensure that both links are in the
  442  * list otherwise the behaviour of this function is undefined.
  443  */
  444 //--------------------------------------------------------------------------------------------------
  445 void le_dls_Swap
  446 (
  447     le_dls_List_t* listPtr,         ///< [IN] List containing the links to swap.
  448     le_dls_Link_t* linkPtr,         ///< [IN] One of the two link pointers to swap.
  449     le_dls_Link_t* otherLinkPtr     ///< [IN] Other link pointer to swap.
  450 );
  451 
  452 
  453 //--------------------------------------------------------------------------------------------------
  454 /**
  455  * Sort a list in ascending order.
  456  */
  457 //--------------------------------------------------------------------------------------------------
  458 void le_dls_Sort
  459 (
  460     le_dls_List_t* listPtr,                 ///< [IN] List to sort
  461     le_dls_LessThanFunc_t comparatorPtr     ///< [IN] Comparator function for sorting
  462 );
  463 
  464 
  465 //--------------------------------------------------------------------------------------------------
  466 /**
  467  * Checks if a link is in the list.
  468  *
  469  * @return
  470  *      true if the link is in the list.
  471  *      false if the link is not in the list.
  472  */
  473 //--------------------------------------------------------------------------------------------------
  474 bool le_dls_IsInList
  475 (
  476     const le_dls_List_t* listPtr,    ///< [IN] List to check.
  477     const le_dls_Link_t* linkPtr     ///< [IN] Check if this link is in the list.
  478 );
  479 
  480 
  481 //--------------------------------------------------------------------------------------------------
  482 /**
  483  * Checks if a link is at the head of the list (next to be popped).
  484  *
  485  * @return
  486  *    - true if the link is at the head of the list.
  487  *    - false if not.
  488  */
  489 //--------------------------------------------------------------------------------------------------
  490 LE_DECLARE_INLINE bool le_dls_IsHead
  491 (
  492     const le_dls_List_t* listPtr,    ///< [IN] List to check.
  493     const le_dls_Link_t* linkPtr     ///< [IN] Check if this link is at the head of the list.
  494 )
  495 {
  496     return (le_dls_Peek(listPtr) == linkPtr);
  497 }
  498 
  499 
  500 //--------------------------------------------------------------------------------------------------
  501 /**
  502  * Checks if a link is at the tail of the list (last to be popped).
  503  *
  504  * @return
  505  *    - true if the link is at the tail of the list.
  506  *    - false if not.
  507  */
  508 //--------------------------------------------------------------------------------------------------
  509 LE_DECLARE_INLINE bool le_dls_IsTail
  510 (
  511     const le_dls_List_t* listPtr,    ///< [IN] List to check.
  512     const le_dls_Link_t* linkPtr     ///< [IN] Check if this link is at the tail of the list.
  513 )
  514 {
  515     return (le_dls_PeekTail(listPtr) == linkPtr);
  516 }
  517 
  518 
  519 //--------------------------------------------------------------------------------------------------
  520 /**
  521  * Returns the number of links in a list.
  522  *
  523  * @return
  524  *      Number of links.
  525  */
  526 //--------------------------------------------------------------------------------------------------
  527 size_t le_dls_NumLinks
  528 (
  529     const le_dls_List_t* listPtr       ///< [IN] List to count.
  530 );
  531 
  532 
  533 //--------------------------------------------------------------------------------------------------
  534 /**
  535  * Checks if the list is corrupted.
  536  *
  537  * @return
  538  *      true if the list is corrupted.
  539  *      false if the list is not corrupted.
  540  */
  541 //--------------------------------------------------------------------------------------------------
  542 bool le_dls_IsListCorrupted
  543 (
  544     const le_dls_List_t* listPtr    ///< [IN] List to check.
  545 );
  546 
  547 //--------------------------------------------------------------------------------------------------
  548 /**
  549  * Simple iteration through a doubly linked list
  550  */
  551 //--------------------------------------------------------------------------------------------------
  552 #define LE_DLS_FOREACH(listPtr, iteratorPtr, type, member)              \
  553     for ((iteratorPtr) = CONTAINER_OF(le_dls_Peek(listPtr), type, member); \
  554          &((iteratorPtr)->member);                                      \
  555          (iteratorPtr) = CONTAINER_OF(le_dls_PeekNext((listPtr),&((iteratorPtr)->member)), \
  556                                       type, member))
  557 
  558 
  559 #endif  // LEGATO_DOUBLY_LINKED_LIST_INCLUDE_GUARD
le_dls_PeekPrev
le_dls_Link_t * le_dls_PeekPrev(const le_dls_List_t *listPtr, const le_dls_Link_t *currentLinkPtr)
le_dls_PeekTail
le_dls_Link_t * le_dls_PeekTail(const le_dls_List_t *listPtr)
le_dls_IsEmpty
LE_DECLARE_INLINE bool le_dls_IsEmpty(const le_dls_List_t *listPtr)
Definition: le_doublyLinkedList.h:393
le_dls_AddBefore
void le_dls_AddBefore(le_dls_List_t *listPtr, le_dls_Link_t *currentLinkPtr, le_dls_Link_t *newLinkPtr)
le_dls_Queue
void le_dls_Queue(le_dls_List_t *listPtr, le_dls_Link_t *newLinkPtr)
le_dls_LessThanFunc_t
bool(* le_dls_LessThanFunc_t)(le_dls_Link_t *a, le_dls_Link_t *b)
Definition: le_doublyLinkedList.h:230
le_dls_IsListCorrupted
bool le_dls_IsListCorrupted(const le_dls_List_t *listPtr)
le_dls_List_t::headLinkPtr
le_dls_Link_t * headLinkPtr
Link to list head. 
Definition: le_doublyLinkedList.h:218
le_dls_AddAfter
void le_dls_AddAfter(le_dls_List_t *listPtr, le_dls_Link_t *currentLinkPtr, le_dls_Link_t *newLinkPtr)
le_dls_Remove
void le_dls_Remove(le_dls_List_t *listPtr, le_dls_Link_t *linkToRemovePtr)
le_dls_PeekNext
le_dls_Link_t * le_dls_PeekNext(const le_dls_List_t *listPtr, const le_dls_Link_t *currentLinkPtr)
le_dls_Pop
le_dls_Link_t * le_dls_Pop(le_dls_List_t *listPtr)
le_dls_Stack
void le_dls_Stack(le_dls_List_t *listPtr, le_dls_Link_t *newLinkPtr)
le_dls_NumLinks
size_t le_dls_NumLinks(const le_dls_List_t *listPtr)
le_dls_Link_t::nextPtr
struct le_dls_Link * nextPtr
Next link pointer. 
Definition: le_doublyLinkedList.h:202
le_dls_Swap
void le_dls_Swap(le_dls_List_t *listPtr, le_dls_Link_t *linkPtr, le_dls_Link_t *otherLinkPtr)
le_dls_PopTail
le_dls_Link_t * le_dls_PopTail(le_dls_List_t *listPtr)
le_dls_Link_t
Definition: le_doublyLinkedList.h:200
le_dls_IsHead
LE_DECLARE_INLINE bool le_dls_IsHead(const le_dls_List_t *listPtr, const le_dls_Link_t *linkPtr)
Definition: le_doublyLinkedList.h:491
le_dls_List_t
Definition: le_doublyLinkedList.h:216
le_dls_Link_t::prevPtr
struct le_dls_Link * prevPtr
Previous link pointer. 
Definition: le_doublyLinkedList.h:203
le_dls_Sort
void le_dls_Sort(le_dls_List_t *listPtr, le_dls_LessThanFunc_t comparatorPtr)
LE_DECLARE_INLINE
#define LE_DECLARE_INLINE
Definition: le_basics.h:330
le_dls_Peek
le_dls_Link_t * le_dls_Peek(const le_dls_List_t *listPtr)
le_dls_IsInList
bool le_dls_IsInList(const le_dls_List_t *listPtr, const le_dls_Link_t *linkPtr)
le_dls_IsTail
LE_DECLARE_INLINE bool le_dls_IsTail(const le_dls_List_t *listPtr, const le_dls_Link_t *linkPtr)
Definition: le_doublyLinkedList.h:510