| /****************************************************************************** |
| * |
| * Copyright(c) 2007 - 2017 Realtek Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| *****************************************************************************/ |
| #ifndef __CIRC_BUF_H_ |
| #define __CIRC_BUF_H_ 1 |
| |
| #define CIRC_CNT(head,tail,size) (((head) - (tail)) & ((size)-1)) |
| |
| #define CIRC_SPACE(head,tail,size) CIRC_CNT((tail),((head)+1),(size)) |
| |
| #endif //_CIRC_BUF_H_ |
| |