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89 lines
2.8 KiB
89 lines
2.8 KiB
15 years ago
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/**
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* \defgroup clock Clock interface
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*
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* The clock interface is the interface between the \ref timer "timer library"
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* and the platform specific clock functionality. The clock
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* interface must be implemented for each platform that uses the \ref
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* timer "timer library".
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*
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* The clock interface does only one this: it measures time. The clock
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* interface provides a macro, CLOCK_SECOND, which corresponds to one
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* second of system time.
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*
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* \sa \ref timer "Timer library"
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*
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* @{
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*/
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/*
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* Copyright (c) 2004, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the uIP TCP/IP stack
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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* $Id: clock.h,v 1.3 2006/06/11 21:46:39 adam Exp $
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*/
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#ifndef __CLOCK_H__
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#define __CLOCK_H__
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#include "clock-arch.h"
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/**
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* Initialize the clock library.
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*
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* This function initializes the clock library and should be called
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* from the main() function of the system.
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*
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*/
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void clock_init(void);
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/**
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* Get the current clock time.
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*
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* This function returns the current system clock time.
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*
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* \return The current clock time, measured in system ticks.
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*/
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clock_time_t clock_time(void);
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/**
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* A second, measured in system clock time.
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*
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* \hideinitializer
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*/
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#ifdef CLOCK_CONF_SECOND
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#define CLOCK_SECOND CLOCK_CONF_SECOND
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#else
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#define CLOCK_SECOND (clock_time_t)32
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#endif
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#endif /* __CLOCK_H__ */
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/** @} */
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