timediff16.nc

来自「tinyos2.0版本驱动」· NC 代码 · 共 40 行

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/* -*- mode:c++; indent-tabs-mode: nil -*- * Copyright (c) 2007, Technische Universitaet Berlin * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * - Redistributions of source code must retain the above copyright notice, *   this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright *   notice, this list of conditions and the following disclaimer in the *   documentation and/or other materials provided with the distribution. * - Neither the name of the Technische Universitaet Berlin nor the names *   of its contributors may be used to endorse or promote products derived *   from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES {} LOSS OF USE, DATA, * OR PROFITS {} OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *//** * Manipulate time differences, with overflow checking * @author: Andreas Koepke (koepke@tkn.tu-berlin.de */interface TimeDiff16 {    /** compute delta of two times (now - past),        checks for overflow assuming that now is always > past */    async command uint16_t computeDelta(uint16_t time_now, uint16_t time_past);}

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