| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2002 by Björn Stenberg |
| * |
| * All files in this archive are subject to the GNU General Public License. |
| * See the file COPYING in the source tree root for full license agreement. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #ifndef _KERNEL_H_ |
| #define _KERNEL_H_ |
| |
| /* wrap-safe macros for tick comparison */ |
| #define TIME_AFTER(a,b) ((long)(b) - (long)(a) < 0) |
| #define TIME_BEFORE(a,b) TIME_AFTER(b,a) |
| |
| #define HZ 100 /* number of ticks per second */ |
| |
| /* global tick variable */ |
| extern long current_tick; |
| |
| /* kernel functions */ |
| extern void yield(void); |
| extern void sleep(int ticks); |
| |
| |
| #endif |