2 * \defgroup clock Clock interface
4 * The clock interface is the interface between the \ref timer "timer library"
5 * and the platform specific clock functionality. The clock
6 * interface must be implemented for each platform that uses the \ref
7 * timer "timer library".
9 * The clock interface does only one this: it measures time. The clock
10 * interface provides a macro, CLOCK_SECOND, which corresponds to one
11 * second of system time.
13 * \sa \ref timer "Timer library"
19 * Copyright (c) 2004, Swedish Institute of Computer Science.
20 * All rights reserved.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. Neither the name of the Institute nor the names of its contributors
31 * may be used to endorse or promote products derived from this software
32 * without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * This file is part of the uIP TCP/IP stack
48 * Author: Adam Dunkels <adam@sics.se>
50 * $Id: clock.h,v 1.3 2008/08/28 19:43:32 andrewlxia Exp $
55 #include <geekos/ktypes.h>
56 #include <geekos/timer.h>
58 #define CLOCK_CONF_SECOND 1000
60 typedef ulong_t clock_time_t;
65 * Initialize the clock library.
67 * This function initializes the clock library and should be called
68 * from the main() function of the system.
71 //void clock_init(void);
74 * Get the current clock time.
76 * This function returns the current system clock time.
78 * \return The current clock time, measured in system ticks.
82 //defined in the geekos/timer.c
83 extern clock_time_t clock_time(void);
86 * A second, measured in system clock time.
90 #ifdef CLOCK_CONF_SECOND
91 #define CLOCK_SECOND CLOCK_CONF_SECOND
93 #define CLOCK_SECOND (clock_time_t)32
96 #endif /* __CLOCK_H__ */