release/src-rt-6.x.4708/linux/linux-2.6.36/include/Common/Queue.h

   1 /*
   2 * Queue.h
   3 *
   4 *Copyright (C) 2010 Beceem Communications, Inc.
   5 *
   6 *This program is free software: you can redistribute it and/or modify
   7 *it under the terms of the GNU General Public License version 2 as
   8 *published by the Free Software Foundation.
   9 *
  10 *This program is distributed in the hope that it will be useful,but
  11 *WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13 *See the GNU General Public License for more details.
  14 *
  15 *You should have received a copy of the GNU General Public License
  16 *along with this program. If not, write to the Free Software Foundation, Inc.,
  17 *51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 *
  19 */
  20
  21
  22 #ifndef __QUEUE_H__
  23 #define __QUEUE_H__
  24
  25
  26
  27 #define ENQUEUEPACKET(_Head, _Tail,_Packet)     \
  28 do                                              \
  29 {                                               \
  30     if (!_Head) {                           \
  31                 _Head = _Packet;                \
  32         }                                       \
  33         else {                                  \
  34                 (_Tail)->next = _Packet;        \
  35         }                                       \
  36         (_Packet)->next = NULL;                 \
  37     _Tail = _Packet;                        \
  38 }while(0)
  39 #define DEQUEUEPACKET(Head, Tail )              \
  40 do                                              \
  41 {   if(Head)                    \
  42         {                                            \
  43         if (!Head->next) {                      \
  44                 Tail = NULL;                    \
  45         }                                       \
  46         Head = Head->next;                      \
  47         }               \
  48 }while(0)
  49 #endif  //__QUEUE_H__