drivers/staging/rt2870/link_list.h

   1 /*
   2  *************************************************************************
   3  * Ralink Tech Inc.
   4  * 5F., No.36, Taiyuan St., Jhubei City,
   5  * Hsinchu County 302,
   6  * Taiwan, R.O.C.
   7  *
   8  * (c) Copyright 2002-2007, Ralink Technology, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify  *
  11  * it under the terms of the GNU General Public License as published by  *
  12  * the Free Software Foundation; either version 2 of the License, or     *
  13  * (at your option) any later version.                                   *
  14  *                                                                       *
  15  * This program is distributed in the hope that it will be useful,       *
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  18  * GNU General Public License for more details.                          *
  19  *                                                                       *
  20  * You should have received a copy of the GNU General Public License     *
  21  * along with this program; if not, write to the                         *
  22  * Free Software Foundation, Inc.,                                       *
  23  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  24  *                                                                       *
  25  *************************************************************************
  26  */
  27
  28 #ifndef __LINK_LIST_H__
  29 #define __LINK_LIST_H__
  30
  31 typedef struct _LIST_ENTRY
  32 {
  33         struct _LIST_ENTRY *pNext;
  34 } LIST_ENTRY, *PLIST_ENTRY;
  35
  36 typedef struct _LIST_HEADR
  37 {
  38         PLIST_ENTRY pHead;
  39         PLIST_ENTRY pTail;
  40         UCHAR size;
  41 } LIST_HEADER, *PLIST_HEADER;
  42
  43 static inline VOID initList(
  44         IN PLIST_HEADER pList)
  45 {
  46         pList->pHead = pList->pTail = NULL;
  47         pList->size = 0;
  48         return;
  49 }
  50
  51 static inline VOID insertTailList(
  52         IN PLIST_HEADER pList,
  53         IN PLIST_ENTRY pEntry)
  54 {
  55         pEntry->pNext = NULL;
  56         if (pList->pTail)
  57                 pList->pTail->pNext = pEntry;
  58         else
  59                 pList->pHead = pEntry;
  60         pList->pTail = pEntry;
  61         pList->size++;
  62
  63         return;
  64 }
  65
  66 static inline PLIST_ENTRY removeHeadList(
  67         IN PLIST_HEADER pList)
  68 {
  69         PLIST_ENTRY pNext;
  70         PLIST_ENTRY pEntry;
  71
  72         pEntry = pList->pHead;
  73         if (pList->pHead != NULL)
  74         {
  75                 pNext = pList->pHead->pNext;
  76                 pList->pHead = pNext;
  77                 if (pNext == NULL)
  78                         pList->pTail = NULL;
  79                 pList->size--;
  80         }
  81         return pEntry;
  82 }
  83
  84 static inline int getListSize(
  85         IN PLIST_HEADER pList)
  86 {
  87         return pList->size;
  88 }
  89
  90 static inline PLIST_ENTRY delEntryList(
  91         IN PLIST_HEADER pList,
  92         IN PLIST_ENTRY pEntry)
  93 {
  94         PLIST_ENTRY pCurEntry;
  95         PLIST_ENTRY pPrvEntry;
  96
  97         if(pList->pHead == NULL)
  98                 return NULL;
  99
 100         if(pEntry == pList->pHead)
 101         {
 102                 pCurEntry = pList->pHead;
 103                 pList->pHead = pCurEntry->pNext;
 104
 105                 if(pList->pHead == NULL)
 106                         pList->pTail = NULL;
 107
 108                 pList->size--;
 109                 return pCurEntry;
 110         }
 111
 112         pPrvEntry = pList->pHead;
 113         pCurEntry = pPrvEntry->pNext;
 114         while(pCurEntry != NULL)
 115         {
 116                 if (pEntry == pCurEntry)
 117                 {
 118                         pPrvEntry->pNext = pCurEntry->pNext;
 119
 120                         if(pEntry == pList->pTail)
 121                                 pList->pTail = pPrvEntry;
 122
 123                         pList->size--;
 124                         break;
 125                 }
 126                 pPrvEntry = pCurEntry;
 127                 pCurEntry = pPrvEntry->pNext;
 128         }
 129
 130         return pCurEntry;
 131 }
 132
 133 #endif // ___LINK_LIST_H__ //
 134