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Show/hide line numbers uip_timer.h Source File

uip_timer.h

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00001 /**
00002  * \defgroup timer Timer library
00003  *
00004  * The timer library provides functions for setting, resetting and
00005  * restarting timers, and for checking if a timer has expired. An
00006  * application must "manually" check if its timers have expired; this
00007  * is not done automatically.
00008  *
00009  * A timer is declared as a \c struct \c timer and all access to the
00010  * timer is made by a pointer to the declared timer.
00011  *
00012  * \note The timer library uses the \ref clock "Clock library" to
00013  * measure time. Intervals should be specified in the format used by
00014  * the clock library.
00015  *
00016  * @{
00017  */
00018 /**
00019  * \file
00020  * Timer library header file.
00021  * \author
00022  * Adam Dunkels <adam@sics.se>
00023  */
00024 /*
00025  * Copyright (c) 2004, Swedish Institute of Computer Science.
00026  * All rights reserved.
00027  *
00028  * Redistribution and use in source and binary forms, with or without
00029  * modification, are permitted provided that the following conditions
00030  * are met:
00031  * 1. Redistributions of source code must retain the above copyright
00032  *    notice, this list of conditions and the following disclaimer.
00033  * 2. Redistributions in binary form must reproduce the above copyright
00034  *    notice, this list of conditions and the following disclaimer in the
00035  *    documentation and/or other materials provided with the distribution.
00036  * 3. Neither the name of the Institute nor the names of its contributors
00037  *    may be used to endorse or promote products derived from this software
00038  *    without specific prior written permission.
00039  *
00040  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00041  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00042  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00043  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00044  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00045  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00046  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00047  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00048  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00049  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00050  * SUCH DAMAGE.
00051  *
00052  * This file is part of the UIP TCP/IP stack
00053  *
00054  * Author: Adam Dunkels <adam@sics.se>
00055  *
00056  * $Id: timer.h,v 1.3 2006/06/11 21:46:39 adam Exp $
00057  */
00058 #ifndef __UIP_TIMER_H__
00059 #define __UIP_TIMER_H__
00060 
00061 #include "uip_clock.h"
00062 
00063 /**
00064  * A timer.
00065  *
00066  * This structure is used for declaring a timer. The timer must be set
00067  * with timer_set() before it can be used.
00068  *
00069  * \hideinitializer
00070  */
00071 struct uip_timer
00072 {
00073     clock_time_t    start;
00074     clock_time_t    interval;
00075 };
00076 
00077 void    uip_timer_set(struct uip_timer* t, clock_time_t interval);
00078 void    uip_timer_reset(struct uip_timer* t);
00079 void    uip_timer_restart(struct uip_timer* t);
00080 int     uip_timer_expired(struct uip_timer* t);
00081 #endif /* __UIP_TIMER_H__ */
00082 
00083 /** @} */